Prashant Koli - Academia.edu (original) (raw)

Papers by Prashant Koli

Research paper thumbnail of Amalgamation of ZrO2-PANI Nanocomposite Polymeric Material: Characterization and Expeditious Photocatalytic Performance Towards Carbol Fuchsin (CF) Dye and Kinetic Study

Journal of Inorganic and Organometallic Polymers and Materials

Research paper thumbnail of The Augmentation of nanotechnology era: A concise review on fundamental concepts of nanotechnology and applications in material science and technology

Research paper thumbnail of Exploration of photocatalytic performance of TiO2, 5% Ni/TiO2, and 5% Fe/TiO2 for degradation of eosine blue dye: Comparative study

Research paper thumbnail of Nano 5% Fe–ZnO: A highly efficient and recyclable heterogeneous solid nano catalyst for the Biginelli reaction

Journal of the Indian Chemical Society

Research paper thumbnail of “Fe3+ modified zinc oxide nanomaterial as an efficient, multifaceted material for photocatalytic degradation of MB dye and ethanol gas sensor as part of environmental rectification”

Inorganic Chemistry Communications, 2022

Research paper thumbnail of Fe3+ modified zinc oxide nanomaterial as an efficient, multifaceted material for photocatalytic degradation of MB dye and ethanol gas sensor

In the present investigation, we report the preparation of 5% Fe/ZnO nanocatalyst for organic tra... more In the present investigation, we report the preparation of 5% Fe/ZnO nanocatalyst for organic transformations, gas sensing, and organic pollutant elimination applications via the CPT method. A broad range of analytical techniques was applied to attribute the successful modification of the nanocatalyst and to evaluate the structural and morphological properties, surface area, and chemical compositions by the x-ray diffraction, scanning electron microscopy, high resolution-transmission electron microscopy, Brunauer-Emmett-Teller, and energy dispersive spectroscopy techniques. The organic transformations of dihydropyrimidinones, gas sensing performance to ethanol and the photocatalytic degradation of methylene blue (MB) as organic pollutant were studied thoroughly. Compared with undoped ZnO and other nanocatalyst the 5 moles % Fe doped ZnO significantly shows the enhanced catalytic performance in the synthesis process of dihydropyrimidinones at high yield 98% and catalyst dose 10 mol% ...

Research paper thumbnail of Designing of LaCrO3 − TiO2 nanocomposites p: n heterojunction-based sensor material for the selective detection of volatile petrol vapors (PV) and CO2 gas vapors

Journal of the Indian Chemical Society, 2022

Research paper thumbnail of Green Synthesis of Ceria Nanoparticles Using Azadirachta Indica Plant Extract: Characterization, Gas Sensing and Antibacterial Studies

Material Science Research India, 2021

In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green ... more In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green route. While preparing the cerium dioxide nanoparticles by co-precipitation method, Neem leaf extract mixed into the precursor of cerium. The synthesized nanoparticles of CeO2 were used for the preparation of thick film sensor by using screen printing strategy. The fabricated CeO2 sensor was characterized by XRD, SEM, EDS and TEM techniques. The structural characteristics investigated by x-ray diffraction technique (XRD). XRD confirms the formation of cubic lattice of CeO2 material. The surface, texture, porosity characteristics were investigated from SEM analysis, while chemical composition of the material was analysed by EDS technique. The transmission electron microscopy (TEM) confirms the formation cubic lattice of the cerium dioxide material. The thickness of the films was calculated from mass difference method, the prepared film sensors belong to thick region. The fabricated materi...

Research paper thumbnail of Computational Insights on Molecular Structure, Electronic Properties, and Chemical Reactivity of (E)-3-(4-Chlorophenyl)-1-(2-Hydroxyphenyl)Prop-2-en-1-one

Material Science Research India, 2020

In the current examination, (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been st... more In the current examination, (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been studied to investigate geometrical entities, electronic properties, and chemical reactivity viewpoints. To inspect structural, spectroscopic, and chemical reactivity aspects, density functional theory method (DFT) at B3LYP/6-311G(d,p) basis set has been employed. The (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been synthesized and characterized by FT-IR, 1HNMR, and 13C NMR spectral techniques. The detailed investigation of bond lengths and bond angles is discussed to comprehend the geometrical framework. To explore its chemical behaviour, Mulliken atomic charges, molecular electrostatic potential surface, and electronic parameters are introduced. The imperative exploration of the electronic properties, such as HOMO and LUMO energies, was studied by the time-dependent DFT (TD-DFT) method. The dipole moment of the title molecule is 2.57 Debye with C1 point group symmetry. T...

Research paper thumbnail of Stannous Oxide Thick Film Nanosensors Design by Screen Printing Technology: Structural, Electrical Parameters and H2s Gas Detection Study

Material Science Research India, 2021

The present research deals with the fabrication of stannous oxide nanoparticles by conventional a... more The present research deals with the fabrication of stannous oxide nanoparticles by conventional and cost effective co precipitation method. The thick film sensors of SnO2 nanoparticles were prepared by standard screen-printing technique by photolithography. The prepared SnO2 material was characterized by several techniques to confirm the structural properties. Initially, the prepared nanoparticles of SnO2 were investigated by x-ray diffraction technique to confirm the synthesis of prepared material within nanoscale. From XRD data the average particle size of prepared thick films was found to be 21.87 nm calculated using Debye-Scherer formula. The material was further characterized by using scanning electron microscopy (SEM) to investigate the structural and surface characteristic of SnO2. SEM data clearly indicates the heterogeneous surface, and some voids present over the surface of SnO2 nanoparticles. The Fourier transfer infra red technique was employed to investigate the metal o...

Research paper thumbnail of Designing of screen-printed stannous oxide (SnO2) thick film sensors modified by cobalt and nitrogen elements for sensing some toxic gases and volatile organic compounds

Current Research in Green and Sustainable Chemistry, 2021

Research paper thumbnail of Designing of Screen-Printed Stannous Oxide Thick Film Sensors Modified by Cobalt and Nitrogen for Sensing Some Toxic Gases and Volatile Organic Compounds

SSRN Electronic Journal, 2021

The present deals with fabrication of undoped SnO2, transition metal Co2+ doped SnO2 and non-meta... more The present deals with fabrication of undoped SnO2, transition metal Co2+ doped SnO2 and non-metal nitrogen doped SnO2 nanostructures. These three materials were prepared by cost effective co-precipitation method. While the thick film sensor was design by screen printing photolithography technique. The fabricated materials were characterized by several techniques. The structural properties of the screen-printed thick films measured by X-ray diffractometer (XRD), which confirms the formation of tetragonal SnO2 nanoparticles with average particle size between 15 -17 nm. The morphological properties of fabricated thick of SnO2 were studied by scanning electron microscopy (SEM), and HR-TEM to get surface and lattice characteristics of prepared material. The EDS technique was utilized to get the elemental composition of the prepared thick film sensors. While the UV-DRS technique was used to get the band gap energy of undoped SnO2 and modified SnO2 sensors. Since, the sensors effectively work over the surface, hence the prepared sensors were investigated by BET) study, from BET results the cobalt modified SnO2 found to be higher surface area. These all-prepared sensors were applied for gas sensing results of NO2, LPG, CO and volatile organic compounds (VOC’S). The modified sensors found to be very effective at NO2 and VOC gas vapours with 80.23 % and 69.13% gas response for cobalt modified SnO2 was observed. The tested gases NO2 and VOC found to be very selective modified sensors. Reusability and recycling results demonstrate that Co2+ doped SnO2 is very efficient, long time stable and reproducible sensor at NO2 and VOC gases.

Research paper thumbnail of Transition metal incorporated, modified bismuth oxide (Bi2O3) nano photo catalyst for deterioration of rosaniline hydrochloride dye as resource for environmental rehabilitation

Journal of the Indian Chemical Society, 2021

Research paper thumbnail of Transition Metals Ni2+, Fe3+ Incorporated Modified ZnO Thick Film Sensors to Monitor the Environmental and Industrial Pollutant Gases

Oriental Journal Of Chemistry, 2020

Zinc oxide is known as multifaceted material due to its special physical and chemical properties.... more Zinc oxide is known as multifaceted material due to its special physical and chemical properties. Present research deals with the fabrication of undopedZnO, 1.5% Fe3+ doped ZnO, and 1.5% Ni2+ doped ZnOnanoparticles by low-cost co-precipitation method. These prepared materials were utilized to prepare thick film sensorsby employing a screen printing technique.The structuralconfirmations of these materials wereperformed by various nano-characterization techniques. The structural properties were investigated by XRD to confirm the nanoscaleZnO as well as the average crystal dimensions. The surface morphological properties of undoped and modified ZnO wereanalyzedby SEM and TEM methods. The average volume pores over prepared materials and surface area were concluded from the N2 adsorption-desorption experiment (BET analysis). The Fe3+ doped ZnO has the highest surface area among all the prepared sensors i.e. 23.55 m²/g. The Fe3+ doped ZnO and Ni2+ZnOnanomaterials were observed to show dec...

Research paper thumbnail of Transition metals Fe3+, Ni2+ modified titanium dioxide (TiO2) film sensors fabricated by CPT method to sense some toxic environmental pollutant gases

Journal of the Indian Chemical Society, 2021

Abstract The present investigation deals synthesis of undoped TiO2, Ni2+ doped TiO2, and Fe3+ dop... more Abstract The present investigation deals synthesis of undoped TiO2, Ni2+ doped TiO2, and Fe3+ doped TiO2 nanoparticles by low-cost co-precipitation (CPT) method. The thick film sensors of all the fabricated modified TiO2 nanoparticles were designed by a screen printing strategy. The prepared thick film sensors were characterized by various sophisticated techniques. The structural parameters of undoped TiO2 and modified TiO2 film sensors were characterized by X-Ray Diffraction (XRD) which confirmed anatase phase of TiO2 lattice. The surface morphological properties of all the prepared materials were confirmed by means of scanning electron microscope (SEM). The energy dispersive spectroscopy (EDS) confirms the elemental composition of all the prepared materials. High-Resolution Transmission Electron Microscopy (HR-TEM) was utilized to investigate the crystal lattice of fabricated TiO2 material. The HR-TEM results revealed the anatase phase crystal morphology of prepared material. The prepared TiO2 materials were also characterized by means of X-Ray photoelectron spectroscopy (XPS) to confirm the surface doping, specific biding energies, chemical states and elemental composition of modified TiO2 materials. The Brunauer–Emmett–Teller (BET) study was carried to investigate the specific surface area of all the prepared sensors. The Fe3+ doped TiO2 sensor found with enhanced surface area (83.10 ​m2/g) in comparison to Ni2+ doped TiO2 and bare TiO2 (67.34 ​m2/g). All the prepared materials were investigated for gas sensing characteristics. The NO2, SO2, and CO2 gases were investigated for all the prepared sensors. The reusability test confirms that the Fe3+ doped TiO2 is reproducible and stable sensor for long time repeated sensing of SO2 and NO2 vapors. Importantly, Fe3+ doped TiO2 sensor showed rapid response and recovery towards SO2 and NO2 vapors.

Research paper thumbnail of Microwave prompted solvent-free synthesis of new series of heterocyclic tagged 7-arylidene indanone hybrids and their computational, antifungal, antioxidant, and cytotoxicity study

Bioorganic Chemistry, 2021

In this study, we report the expeditious synthesis of ten new antifungal and antioxidant agents c... more In this study, we report the expeditious synthesis of ten new antifungal and antioxidant agents containing heterocyclic linked 7-arylidene indanone moiety. The solvent-free microwave technique, ample substrate scope, superfast synthesis, and very simple operation are noteworthy features of this protocol. Antifungal activities of the newly synthesized compounds were evaluated against four fungal strains namely Rhizophus oryzae, Mucor mucido, Aspergillus niger, and Candida albicans. Most of the compounds were shown strong inhibition of the investigated fungal agents. In vitro, antioxidant potential against DPPH and OH radicals affirmed that the synthesized compounds are good to excellent radicals scavenging agents. The cytotoxicity data of the synthesized compounds towards HL-60 cells uncovered that the synthesized compounds display very low to negligible cytotoxicity. The structural and quantum chemical parameters of the synthesized compounds were explored by employing density functional theory (DFT) at B3LYP functional using 6-311G(d,p) basis set. The compound 3a is discussed in detail for the theoretical and experimental correlation. Time-dependent density functional theory (TD-DFT) at CAM-B3LYP functional with 6-311G(d,p) basis set was used for the electronic absorption study in the gas phase and indichloromethane and benzene solvents. The UV-Visible absorption peaks and fundamental vibrational wavenumbers were computed and a good agreement between observed and theoretical results has been achieved. From the DFT and antifungal activity correlation, it has been found that the 7-heteroarylidene indanones with more stabilized LUMO energy levels display good antifungal potential.

Research paper thumbnail of Design, fabrication, antitubercular, antibacterial, antifungal and antioxidant study of silver doped ZnO and CuO nano candidates: A comparative pharmacological study

Current Research in Green and Sustainable Chemistry, 2021

In the present study, ZnO, CuO, CuO/ZnO, 5% Ag/CuO, 10% Ag/CuO, 5%Ag/ZnO, and 10% Ag/ZnO NPs were... more In the present study, ZnO, CuO, CuO/ZnO, 5% Ag/CuO, 10% Ag/CuO, 5%Ag/ZnO, and 10% Ag/ZnO NPs were synthesized to develop bio-nano medicines with potent antibacterial, antifungal, and antioxidant properties. XRD, HR-SEM, EDAX, and HR-TEM spectral analyses were used to establish the structural characteristics of the synthesized NPs. According to the XRD study, the average particle size for CuO NPs was 23.42 nm, for ZnO NPs it was 28.00 nm, and for CuO/ZnO nanocomposite; 25.58 nm. The agglomeration of NPs in ZnO and CuO NPs, as well as the presence of agglomeration and nanorods in the CuO-ZnO nanocomposite, were identified using HR-SEM. In the present study, CuO NPs have a cubic crystal structure, whereas ZnO NPs have a hexagonal crystal structure, as confirmed by HR-TEM. Both cubic and hexagonal crystal lattices were found in the CuO/ZnO nanocomposites. The Ag incorporation into the ZnO and CuO NPs was confirmed using the EDAX. Disc diffusion assay was used to access the antibacterial and antifungal activities whereas REMA assay was used to establish MIC values. Antibacterial analyses were performed against S. aureus, B. subtilis, B. megaterium, Escherichia coli, and M. tuberculosis, while antifungal studies were conducted on R. oryzae, M. mucido, A. niger, and C.albicans. The antimicrobial activities of ZnO NPs were found to be more influenced by Ag incorporation than CuO NPs. The optimal dopant for enhancing the antimicrobial activities of the synthesized ZnO NPs was found to be 5% Ag. Furthermore, DPPH and OH radical scavenging results uncovered that synthesized NPs possessed good antioxidant potential.

Research paper thumbnail of Sol-Gel Fabricated Transition Metal Cr3+, Co2+ Doped Lanthanum Ferric Oxide (LFO-LaFeO3) Thin Film Sensors for the Detection of Toxic, Flammable Gases: A Comparative Study

Material Science Research India, 2020

In this investigation we are reporting the rapid preparation of Perovskite LaFeO3 thin films prep... more In this investigation we are reporting the rapid preparation of Perovskite LaFeO3 thin films prepared by sol-gel synthesis followed by spin coating method. The structural properties of the spin coated LaFeO3 thin films measured by X-ray Diffractometer which confirms the formation of monophasic, orthorhombic, Perovskite LaFeO3 material. The morphological features of the films were explore by the ease of scanning electron microscopy, where the crystalline LaFeO3 nanoparticles were observed. Energy dispersive spectroscopy was utilized for the determination of elemental composition. The electrical properties were carried out to confirm the typical semiconducting behaviour of LaFeO3 p- type semiconductor. The thin films were subjected for gas sensing study, the material was found to be very efficient gas sensors for LPG, petrol vapour, CO2, methanol, ethanol, acetone gases. The main object was to discuss comparative study, means, what changes in parameters may be observed due to doping e...

Research paper thumbnail of The binary oxide NiO-CuO nanocomposite based thick film sensor for the acute detection of Hydrogen Sulphide gas vapours

Material Science Research India, 2020

The present research deals with the synthesis of copper oxide and nickel oxide nanoparticles. The... more The present research deals with the synthesis of copper oxide and nickel oxide nanoparticles. The nano powder of both NiO-CuO was utilized to fabricate the thick films.Thick films fabricated by screen printing method on glass substrate. The ex-situ doping method was followed for mixing the concentration of nickel oxide in copper oxide lattice. Calculated stoichiometric amount of NiO was loaded during thick film synthesis of CuO.The structure morphology of prepared CuO-NiO nanocomposite thick films was confirmed from x-ray diffraction technique, whichapproves cubic and crystalline CuO-NiO binary nanocomposite. The surface characteristics of the prepared films investigated byscanning electron microscopy that shows homogeneous, porous CuO-NiO nanoparticles with varying dimensions.The prepared thick films of CuO-NiO nanoparticles were analysed for electrical parameter, that assured the prepared material has a semiconducting nature. Further, these thick films promoted for gas sensing int...

Research paper thumbnail of Screen Print Fabricated In3+ Decorated Perovskite Lanthanum Chromium Oxide (LaCrO3) Thick Film Sensors for Selective Detection of Volatile Petrol Vapors

Journal of Inorganic and Organometallic Polymers and Materials, 2020

The present work deals with the fabrication of undoped lanthanum chromium oxide and indium doped ... more The present work deals with the fabrication of undoped lanthanum chromium oxide and indium doped lanthanum chromium oxide material by cost effective sol-gel method. The four sensors were fabricated by screen printing technique. The indium ion concentration was varied for LaCrO 3 material from 0.1 M% to 0.7 M% to access the comparative gas sensing results. All the prepared materials were characterized by XRD, SEM, EDAX, TEM and IR to confirm their structural and chemical composition. The prepared sensors viz. 0.1 M% In 3+ doped LaCrO 3 , 0.3 M% In 3+ doped LaCrO 3 , 0.5 M% In 3+ doped LaCrO 3 and 0.7 M% In 3+ doped LaCrO 3 were investigated for gas sensing mechanism for selected gases such as petrol vapours, ethanol, ammonia, NO 2 , H2S and CO 2 gases. The optimum response was recorded for tested gases for all the prepared sensors. The 0.3 M% In 3+ doped LaCrO 3 found to be exceptional for petrol vapour and highest response was recorded for petrol vapors for 0.3 M% In 3+ doped LaCrO 3 thick film sensor. All the indium doped are found to be good sensors for petrol vapours and moderate for other tested gases. The prime parameters for the sensors such as selectivity, response and recovery and reproducibility were recorded for the prepared sensor. The response and recovery was very rapid for 0.3 M% In 3+ doped LaCrO 3 sensor. The gas sensing mechanism for petrol vapours has been established for 0.3 M% In 3+ doped LaCrO 3 sensor via hole accumulation layer mechanism.

Research paper thumbnail of Amalgamation of ZrO2-PANI Nanocomposite Polymeric Material: Characterization and Expeditious Photocatalytic Performance Towards Carbol Fuchsin (CF) Dye and Kinetic Study

Journal of Inorganic and Organometallic Polymers and Materials

Research paper thumbnail of The Augmentation of nanotechnology era: A concise review on fundamental concepts of nanotechnology and applications in material science and technology

Research paper thumbnail of Exploration of photocatalytic performance of TiO2, 5% Ni/TiO2, and 5% Fe/TiO2 for degradation of eosine blue dye: Comparative study

Research paper thumbnail of Nano 5% Fe–ZnO: A highly efficient and recyclable heterogeneous solid nano catalyst for the Biginelli reaction

Journal of the Indian Chemical Society

Research paper thumbnail of “Fe3+ modified zinc oxide nanomaterial as an efficient, multifaceted material for photocatalytic degradation of MB dye and ethanol gas sensor as part of environmental rectification”

Inorganic Chemistry Communications, 2022

Research paper thumbnail of Fe3+ modified zinc oxide nanomaterial as an efficient, multifaceted material for photocatalytic degradation of MB dye and ethanol gas sensor

In the present investigation, we report the preparation of 5% Fe/ZnO nanocatalyst for organic tra... more In the present investigation, we report the preparation of 5% Fe/ZnO nanocatalyst for organic transformations, gas sensing, and organic pollutant elimination applications via the CPT method. A broad range of analytical techniques was applied to attribute the successful modification of the nanocatalyst and to evaluate the structural and morphological properties, surface area, and chemical compositions by the x-ray diffraction, scanning electron microscopy, high resolution-transmission electron microscopy, Brunauer-Emmett-Teller, and energy dispersive spectroscopy techniques. The organic transformations of dihydropyrimidinones, gas sensing performance to ethanol and the photocatalytic degradation of methylene blue (MB) as organic pollutant were studied thoroughly. Compared with undoped ZnO and other nanocatalyst the 5 moles % Fe doped ZnO significantly shows the enhanced catalytic performance in the synthesis process of dihydropyrimidinones at high yield 98% and catalyst dose 10 mol% ...

Research paper thumbnail of Designing of LaCrO3 − TiO2 nanocomposites p: n heterojunction-based sensor material for the selective detection of volatile petrol vapors (PV) and CO2 gas vapors

Journal of the Indian Chemical Society, 2022

Research paper thumbnail of Green Synthesis of Ceria Nanoparticles Using Azadirachta Indica Plant Extract: Characterization, Gas Sensing and Antibacterial Studies

Material Science Research India, 2021

In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green ... more In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green route. While preparing the cerium dioxide nanoparticles by co-precipitation method, Neem leaf extract mixed into the precursor of cerium. The synthesized nanoparticles of CeO2 were used for the preparation of thick film sensor by using screen printing strategy. The fabricated CeO2 sensor was characterized by XRD, SEM, EDS and TEM techniques. The structural characteristics investigated by x-ray diffraction technique (XRD). XRD confirms the formation of cubic lattice of CeO2 material. The surface, texture, porosity characteristics were investigated from SEM analysis, while chemical composition of the material was analysed by EDS technique. The transmission electron microscopy (TEM) confirms the formation cubic lattice of the cerium dioxide material. The thickness of the films was calculated from mass difference method, the prepared film sensors belong to thick region. The fabricated materi...

Research paper thumbnail of Computational Insights on Molecular Structure, Electronic Properties, and Chemical Reactivity of (E)-3-(4-Chlorophenyl)-1-(2-Hydroxyphenyl)Prop-2-en-1-one

Material Science Research India, 2020

In the current examination, (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been st... more In the current examination, (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been studied to investigate geometrical entities, electronic properties, and chemical reactivity viewpoints. To inspect structural, spectroscopic, and chemical reactivity aspects, density functional theory method (DFT) at B3LYP/6-311G(d,p) basis set has been employed. The (E)-3-(4-chlorophenyl)-1-(2-hydroxyphenyl)prop-2-en-1-one has been synthesized and characterized by FT-IR, 1HNMR, and 13C NMR spectral techniques. The detailed investigation of bond lengths and bond angles is discussed to comprehend the geometrical framework. To explore its chemical behaviour, Mulliken atomic charges, molecular electrostatic potential surface, and electronic parameters are introduced. The imperative exploration of the electronic properties, such as HOMO and LUMO energies, was studied by the time-dependent DFT (TD-DFT) method. The dipole moment of the title molecule is 2.57 Debye with C1 point group symmetry. T...

Research paper thumbnail of Stannous Oxide Thick Film Nanosensors Design by Screen Printing Technology: Structural, Electrical Parameters and H2s Gas Detection Study

Material Science Research India, 2021

The present research deals with the fabrication of stannous oxide nanoparticles by conventional a... more The present research deals with the fabrication of stannous oxide nanoparticles by conventional and cost effective co precipitation method. The thick film sensors of SnO2 nanoparticles were prepared by standard screen-printing technique by photolithography. The prepared SnO2 material was characterized by several techniques to confirm the structural properties. Initially, the prepared nanoparticles of SnO2 were investigated by x-ray diffraction technique to confirm the synthesis of prepared material within nanoscale. From XRD data the average particle size of prepared thick films was found to be 21.87 nm calculated using Debye-Scherer formula. The material was further characterized by using scanning electron microscopy (SEM) to investigate the structural and surface characteristic of SnO2. SEM data clearly indicates the heterogeneous surface, and some voids present over the surface of SnO2 nanoparticles. The Fourier transfer infra red technique was employed to investigate the metal o...

Research paper thumbnail of Designing of screen-printed stannous oxide (SnO2) thick film sensors modified by cobalt and nitrogen elements for sensing some toxic gases and volatile organic compounds

Current Research in Green and Sustainable Chemistry, 2021

Research paper thumbnail of Designing of Screen-Printed Stannous Oxide Thick Film Sensors Modified by Cobalt and Nitrogen for Sensing Some Toxic Gases and Volatile Organic Compounds

SSRN Electronic Journal, 2021

The present deals with fabrication of undoped SnO2, transition metal Co2+ doped SnO2 and non-meta... more The present deals with fabrication of undoped SnO2, transition metal Co2+ doped SnO2 and non-metal nitrogen doped SnO2 nanostructures. These three materials were prepared by cost effective co-precipitation method. While the thick film sensor was design by screen printing photolithography technique. The fabricated materials were characterized by several techniques. The structural properties of the screen-printed thick films measured by X-ray diffractometer (XRD), which confirms the formation of tetragonal SnO2 nanoparticles with average particle size between 15 -17 nm. The morphological properties of fabricated thick of SnO2 were studied by scanning electron microscopy (SEM), and HR-TEM to get surface and lattice characteristics of prepared material. The EDS technique was utilized to get the elemental composition of the prepared thick film sensors. While the UV-DRS technique was used to get the band gap energy of undoped SnO2 and modified SnO2 sensors. Since, the sensors effectively work over the surface, hence the prepared sensors were investigated by BET) study, from BET results the cobalt modified SnO2 found to be higher surface area. These all-prepared sensors were applied for gas sensing results of NO2, LPG, CO and volatile organic compounds (VOC’S). The modified sensors found to be very effective at NO2 and VOC gas vapours with 80.23 % and 69.13% gas response for cobalt modified SnO2 was observed. The tested gases NO2 and VOC found to be very selective modified sensors. Reusability and recycling results demonstrate that Co2+ doped SnO2 is very efficient, long time stable and reproducible sensor at NO2 and VOC gases.

Research paper thumbnail of Transition metal incorporated, modified bismuth oxide (Bi2O3) nano photo catalyst for deterioration of rosaniline hydrochloride dye as resource for environmental rehabilitation

Journal of the Indian Chemical Society, 2021

Research paper thumbnail of Transition Metals Ni2+, Fe3+ Incorporated Modified ZnO Thick Film Sensors to Monitor the Environmental and Industrial Pollutant Gases

Oriental Journal Of Chemistry, 2020

Zinc oxide is known as multifaceted material due to its special physical and chemical properties.... more Zinc oxide is known as multifaceted material due to its special physical and chemical properties. Present research deals with the fabrication of undopedZnO, 1.5% Fe3+ doped ZnO, and 1.5% Ni2+ doped ZnOnanoparticles by low-cost co-precipitation method. These prepared materials were utilized to prepare thick film sensorsby employing a screen printing technique.The structuralconfirmations of these materials wereperformed by various nano-characterization techniques. The structural properties were investigated by XRD to confirm the nanoscaleZnO as well as the average crystal dimensions. The surface morphological properties of undoped and modified ZnO wereanalyzedby SEM and TEM methods. The average volume pores over prepared materials and surface area were concluded from the N2 adsorption-desorption experiment (BET analysis). The Fe3+ doped ZnO has the highest surface area among all the prepared sensors i.e. 23.55 m²/g. The Fe3+ doped ZnO and Ni2+ZnOnanomaterials were observed to show dec...

Research paper thumbnail of Transition metals Fe3+, Ni2+ modified titanium dioxide (TiO2) film sensors fabricated by CPT method to sense some toxic environmental pollutant gases

Journal of the Indian Chemical Society, 2021

Abstract The present investigation deals synthesis of undoped TiO2, Ni2+ doped TiO2, and Fe3+ dop... more Abstract The present investigation deals synthesis of undoped TiO2, Ni2+ doped TiO2, and Fe3+ doped TiO2 nanoparticles by low-cost co-precipitation (CPT) method. The thick film sensors of all the fabricated modified TiO2 nanoparticles were designed by a screen printing strategy. The prepared thick film sensors were characterized by various sophisticated techniques. The structural parameters of undoped TiO2 and modified TiO2 film sensors were characterized by X-Ray Diffraction (XRD) which confirmed anatase phase of TiO2 lattice. The surface morphological properties of all the prepared materials were confirmed by means of scanning electron microscope (SEM). The energy dispersive spectroscopy (EDS) confirms the elemental composition of all the prepared materials. High-Resolution Transmission Electron Microscopy (HR-TEM) was utilized to investigate the crystal lattice of fabricated TiO2 material. The HR-TEM results revealed the anatase phase crystal morphology of prepared material. The prepared TiO2 materials were also characterized by means of X-Ray photoelectron spectroscopy (XPS) to confirm the surface doping, specific biding energies, chemical states and elemental composition of modified TiO2 materials. The Brunauer–Emmett–Teller (BET) study was carried to investigate the specific surface area of all the prepared sensors. The Fe3+ doped TiO2 sensor found with enhanced surface area (83.10 ​m2/g) in comparison to Ni2+ doped TiO2 and bare TiO2 (67.34 ​m2/g). All the prepared materials were investigated for gas sensing characteristics. The NO2, SO2, and CO2 gases were investigated for all the prepared sensors. The reusability test confirms that the Fe3+ doped TiO2 is reproducible and stable sensor for long time repeated sensing of SO2 and NO2 vapors. Importantly, Fe3+ doped TiO2 sensor showed rapid response and recovery towards SO2 and NO2 vapors.

Research paper thumbnail of Microwave prompted solvent-free synthesis of new series of heterocyclic tagged 7-arylidene indanone hybrids and their computational, antifungal, antioxidant, and cytotoxicity study

Bioorganic Chemistry, 2021

In this study, we report the expeditious synthesis of ten new antifungal and antioxidant agents c... more In this study, we report the expeditious synthesis of ten new antifungal and antioxidant agents containing heterocyclic linked 7-arylidene indanone moiety. The solvent-free microwave technique, ample substrate scope, superfast synthesis, and very simple operation are noteworthy features of this protocol. Antifungal activities of the newly synthesized compounds were evaluated against four fungal strains namely Rhizophus oryzae, Mucor mucido, Aspergillus niger, and Candida albicans. Most of the compounds were shown strong inhibition of the investigated fungal agents. In vitro, antioxidant potential against DPPH and OH radicals affirmed that the synthesized compounds are good to excellent radicals scavenging agents. The cytotoxicity data of the synthesized compounds towards HL-60 cells uncovered that the synthesized compounds display very low to negligible cytotoxicity. The structural and quantum chemical parameters of the synthesized compounds were explored by employing density functional theory (DFT) at B3LYP functional using 6-311G(d,p) basis set. The compound 3a is discussed in detail for the theoretical and experimental correlation. Time-dependent density functional theory (TD-DFT) at CAM-B3LYP functional with 6-311G(d,p) basis set was used for the electronic absorption study in the gas phase and indichloromethane and benzene solvents. The UV-Visible absorption peaks and fundamental vibrational wavenumbers were computed and a good agreement between observed and theoretical results has been achieved. From the DFT and antifungal activity correlation, it has been found that the 7-heteroarylidene indanones with more stabilized LUMO energy levels display good antifungal potential.

Research paper thumbnail of Design, fabrication, antitubercular, antibacterial, antifungal and antioxidant study of silver doped ZnO and CuO nano candidates: A comparative pharmacological study

Current Research in Green and Sustainable Chemistry, 2021

In the present study, ZnO, CuO, CuO/ZnO, 5% Ag/CuO, 10% Ag/CuO, 5%Ag/ZnO, and 10% Ag/ZnO NPs were... more In the present study, ZnO, CuO, CuO/ZnO, 5% Ag/CuO, 10% Ag/CuO, 5%Ag/ZnO, and 10% Ag/ZnO NPs were synthesized to develop bio-nano medicines with potent antibacterial, antifungal, and antioxidant properties. XRD, HR-SEM, EDAX, and HR-TEM spectral analyses were used to establish the structural characteristics of the synthesized NPs. According to the XRD study, the average particle size for CuO NPs was 23.42 nm, for ZnO NPs it was 28.00 nm, and for CuO/ZnO nanocomposite; 25.58 nm. The agglomeration of NPs in ZnO and CuO NPs, as well as the presence of agglomeration and nanorods in the CuO-ZnO nanocomposite, were identified using HR-SEM. In the present study, CuO NPs have a cubic crystal structure, whereas ZnO NPs have a hexagonal crystal structure, as confirmed by HR-TEM. Both cubic and hexagonal crystal lattices were found in the CuO/ZnO nanocomposites. The Ag incorporation into the ZnO and CuO NPs was confirmed using the EDAX. Disc diffusion assay was used to access the antibacterial and antifungal activities whereas REMA assay was used to establish MIC values. Antibacterial analyses were performed against S. aureus, B. subtilis, B. megaterium, Escherichia coli, and M. tuberculosis, while antifungal studies were conducted on R. oryzae, M. mucido, A. niger, and C.albicans. The antimicrobial activities of ZnO NPs were found to be more influenced by Ag incorporation than CuO NPs. The optimal dopant for enhancing the antimicrobial activities of the synthesized ZnO NPs was found to be 5% Ag. Furthermore, DPPH and OH radical scavenging results uncovered that synthesized NPs possessed good antioxidant potential.

Research paper thumbnail of Sol-Gel Fabricated Transition Metal Cr3+, Co2+ Doped Lanthanum Ferric Oxide (LFO-LaFeO3) Thin Film Sensors for the Detection of Toxic, Flammable Gases: A Comparative Study

Material Science Research India, 2020

In this investigation we are reporting the rapid preparation of Perovskite LaFeO3 thin films prep... more In this investigation we are reporting the rapid preparation of Perovskite LaFeO3 thin films prepared by sol-gel synthesis followed by spin coating method. The structural properties of the spin coated LaFeO3 thin films measured by X-ray Diffractometer which confirms the formation of monophasic, orthorhombic, Perovskite LaFeO3 material. The morphological features of the films were explore by the ease of scanning electron microscopy, where the crystalline LaFeO3 nanoparticles were observed. Energy dispersive spectroscopy was utilized for the determination of elemental composition. The electrical properties were carried out to confirm the typical semiconducting behaviour of LaFeO3 p- type semiconductor. The thin films were subjected for gas sensing study, the material was found to be very efficient gas sensors for LPG, petrol vapour, CO2, methanol, ethanol, acetone gases. The main object was to discuss comparative study, means, what changes in parameters may be observed due to doping e...

Research paper thumbnail of The binary oxide NiO-CuO nanocomposite based thick film sensor for the acute detection of Hydrogen Sulphide gas vapours

Material Science Research India, 2020

The present research deals with the synthesis of copper oxide and nickel oxide nanoparticles. The... more The present research deals with the synthesis of copper oxide and nickel oxide nanoparticles. The nano powder of both NiO-CuO was utilized to fabricate the thick films.Thick films fabricated by screen printing method on glass substrate. The ex-situ doping method was followed for mixing the concentration of nickel oxide in copper oxide lattice. Calculated stoichiometric amount of NiO was loaded during thick film synthesis of CuO.The structure morphology of prepared CuO-NiO nanocomposite thick films was confirmed from x-ray diffraction technique, whichapproves cubic and crystalline CuO-NiO binary nanocomposite. The surface characteristics of the prepared films investigated byscanning electron microscopy that shows homogeneous, porous CuO-NiO nanoparticles with varying dimensions.The prepared thick films of CuO-NiO nanoparticles were analysed for electrical parameter, that assured the prepared material has a semiconducting nature. Further, these thick films promoted for gas sensing int...

Research paper thumbnail of Screen Print Fabricated In3+ Decorated Perovskite Lanthanum Chromium Oxide (LaCrO3) Thick Film Sensors for Selective Detection of Volatile Petrol Vapors

Journal of Inorganic and Organometallic Polymers and Materials, 2020

The present work deals with the fabrication of undoped lanthanum chromium oxide and indium doped ... more The present work deals with the fabrication of undoped lanthanum chromium oxide and indium doped lanthanum chromium oxide material by cost effective sol-gel method. The four sensors were fabricated by screen printing technique. The indium ion concentration was varied for LaCrO 3 material from 0.1 M% to 0.7 M% to access the comparative gas sensing results. All the prepared materials were characterized by XRD, SEM, EDAX, TEM and IR to confirm their structural and chemical composition. The prepared sensors viz. 0.1 M% In 3+ doped LaCrO 3 , 0.3 M% In 3+ doped LaCrO 3 , 0.5 M% In 3+ doped LaCrO 3 and 0.7 M% In 3+ doped LaCrO 3 were investigated for gas sensing mechanism for selected gases such as petrol vapours, ethanol, ammonia, NO 2 , H2S and CO 2 gases. The optimum response was recorded for tested gases for all the prepared sensors. The 0.3 M% In 3+ doped LaCrO 3 found to be exceptional for petrol vapour and highest response was recorded for petrol vapors for 0.3 M% In 3+ doped LaCrO 3 thick film sensor. All the indium doped are found to be good sensors for petrol vapours and moderate for other tested gases. The prime parameters for the sensors such as selectivity, response and recovery and reproducibility were recorded for the prepared sensor. The response and recovery was very rapid for 0.3 M% In 3+ doped LaCrO 3 sensor. The gas sensing mechanism for petrol vapours has been established for 0.3 M% In 3+ doped LaCrO 3 sensor via hole accumulation layer mechanism.