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Papers by mgh zaidi

IOP Conference Series: Materials Science and Engineering, 2020

In this investigation, surface treatment of ferrite nanoparticles were efficiently prepared by us... more In this investigation, surface treatment of ferrite nanoparticles were efficiently prepared by using amino propyl silane (APS). XRD which is a spectral analysis technique used for investigate the morphology and chemical structure of treated and normal ferrite nanoparticles. Ferrite nanoparticles epoxy composites were prepared by Modified ferrite nanoparticles (MFNs) with varying weight percentage and ferrite nanoparticles (FNs). XRD shown that MFNs was effectively modified with highly crystalline structure and silane surface treatment decreased the average particle size of FNs to ∼ 16.48 nm. Surface treatment of FNs enhanced the homogeneous dispersion of ferrite in epoxy resin and improved interfacial adhesiveness between MFNs and epoxy. Tribological property of Modified ferrite nanoparticles epoxy composite (MFNEs) compare to cured epoxy and normal ferrite nanoparticles epoxy composites (FNEs) has been enhanced due to surface treatment.

International Biodeterioration & Biodegradation, 2010

Superparamagnetic iron oxide nanoparticles (SPION) with size ranging 10.637.8 nm were synthesize... more Superparamagnetic iron oxide nanoparticles (SPION) with size ranging 10.637.8 nm were synthesized and characterized through XRD, FT-IR spectra, simultaneous TG-DTG-DTA, vibrational sample magnetometry (VSM) and transmission electron microscopy (TEM). ...

E-Journal of Chemistry, 2004

Cyclocondensation of a series of substituted phenoxy methylene carboxylic acids with thiosemoicar... more Cyclocondensation of a series of substituted phenoxy methylene carboxylic acids with thiosemoicarbazides afforded 2-Amino-5-Aryloxy Methylene –1,3,4 Thiadiazoles (Ia-Ie). The later were subsequently condensed with different phenoxymethylene carboxylic acid chlorides into 2- Aryloxy Methyleneamido-5-Aryloxy Methylene–1,3,4-Thiadiazoloyl Amides. The wood preservation efficiency of the both class of compounds was evaluated against a wood rotting fungusGleophyllum Straitumat different concentrations using food poison technique. In general phenoxy derivatives have shown more control over the growth ofGleophyllum Straitumthan their corresponding aminothiadiazoles at 500 ppm. The chlorophenoxy-substituted thiadiazoles among all have shown more activity then others againstGleophyllum Straitum.

Springer International Publishing eBooks, 2022

Nano-biotechnology for Waste Water Treatment

Oriental Journal Of Chemistry, 2021

This review highlights origin, symptoms, diagnosis, causative agents, mode of transmission and pe... more This review highlights origin, symptoms, diagnosis, causative agents, mode of transmission and persistence of coronavirus disease (COVID-19) through human activities. In the current scenario researchers, doctors and scientists are striving to combat the transmission of COVID-19 among society. Origin and growth of pandemic has raised the serious concern to address the causative agents, mode of transmission, persistence, preventive measures, diagnosis and possibilities of treatment. The broad-spectrum antiviral antiphrastic, complementary and alternative medicines are currently proposed for possible eradication of the pandemic. The current world is relying on, prevention and control of infection through sanitization and quarantine and onwards waiting for appropriate virucidal agents, sanitizers and strategic vaccination and immunization to combat the pandemic of SARS-CoV-2. Eradication of COVID-19 under stringent guidelines of WHO regarding social practices, intensive care, administra...

Advances in Materials Engineering and Manufacturing Processes, 2020

Epoxy-based ferrite nanoparticle composites are appropriate for various potential applications su... more Epoxy-based ferrite nanoparticle composites are appropriate for various potential applications such as energy storage devices, sensors and electronic device. But ferrite nanoparticle epoxy composites have some limitations. To maintain homogeneous dispersion and interfacial bonding strength between FNs and the epoxy resin is main concern in devolvement of epoxy-based ferrite nanoparticle composites (FNECs). In present research, modified ferrite nanoparticles (MFNs) were prepared by surface modification of normal ferrite particles (FNs) by the use of APTS as surface modification agent. MFNs with different concentration (0.0-2.0 wt%) and FNs (2 wt%) used as a filler for fabrication of ferrite epoxy composites. 0, 0.5, 1.0, 1.5 and 2 wt% are denoted as cured epoxy, MFNEs-I, MFNEs-II, MFNEs-III and MFNEs-IV, respectively, whereas ferrite nanoparticle epoxy composites are denoted as FNEs. FT-IR spectral characterization was shown successfully the surface modification of FNs by APTS. Impact of ferrite dispersion in epoxy matrix after surface modification of ferrite nanoparticle on electrical and magnetic behaviour of composites has been investigated by DC conductivity and VSM test, respectively. Magnetization of MFNEs was increased by 24.29% with respect to FNEs, whereas DC electrical conductivity was increased by 38.77%, 31.25% and 15.88% at 1 V, 10 V and 100 V, respectively.

International Journal of Polymer Analysis and Characterization, 2021

Abstract Polyindole (PIn) nanocomposites (PNCs) at different wt % of tungsten carbide (WC) were p... more Abstract Polyindole (PIn) nanocomposites (PNCs) at different wt % of tungsten carbide (WC) were prepared and characterized through various spectral, thermal and electrical methods. Formation of PNCs was ascertained through scanning electron microscopy (SEM), energy dispersive spectra and simultaneous thermogravimetric-differential thermal analysis (TG-DTA-DTG). PNCs with 15 wt % of WC has shown improved thermo-oxidative stability with TG onset at 200 °C and was decomposed to maximum at 340.2 µg/°C at 465 °C with DTA peak temperature at 458 °C. Electrodes were fabricated through deposition of PNCs over iron plate in presence of polyvinyl butyral (PVB) binder and investigated for DC conductance during their baking in the range of 50 °C. Microstructural variations during the backing of electrodes was monitored through SEM. Electrodes have shown linear current/potential (I/V) relationship with rise in electrical conductivity wt % of WC, applied voltage, temperatures and time. Eelectrodes derived from PNCs with 15 wt % of WC has shown electrical percolation threshold with intact morphology at 6 h at 50 °C. Present study reveals the synthesis of electrically conducting PNCs that withstand up to 200 °C and may serve as future as electrode materials in presence of potential polymeric binders for electronic and electrochemical applications. Graphical Abstract

SSRN Electronic Journal, 2021

Present investigation demonstrates application of pine leaves as green friendly source for produc... more Present investigation demonstrates application of pine leaves as green friendly source for production of biochar (BC) that could to transformed into graphene oxide (GO) for sustained electrochemical energy storage (EES) and corrosion protection in KOH (2.0 M). For this purpose, BC was prepared through pyrolysis of pine leaves (moisture content 78.09 %) at 750 o C over 3 h in nitrogen environment. GO was synthesized through modification in Hammer’s method. Formation of BC and GO was ascertained through Fourier transform infrared, Raman and X-ray diffraction spectra. Working electrodes (WE) were fabricated from BC (WE BC ) and GO (WE GO ) in presence of hydroxy methyl propyl cellulose as binder and their morphologies were compared through scanning electron microscopy. WE were electrochemically analyzed through cyclic voltammetry (CV), electrochemical impedance spectra (EIS) and potentiodynamic polarization in KOH (2.0 M). CV @ 0.005 V/s in potential window of -0.71 V to -0.21 V reveals 390.4 F/g of Cs of WE GO that was 24.49 % improved over WE BC . EIS in frequency response (KHz) ranging 1.0 × 10 -5 Hz to 100 at ± 0.005 V reveals stability of WE over 24 h. Potentiodynamic polarization in the potential ranging -1.5 to 1.0 @ 0.005 V/s reveals corrosion rate (mm/year) of WE GO @ 4.69 × 10 -4 that was much reduced over WE BC (2.27 × 10 -3 ) under identical conditions.

Materials Today: Proceedings, 2021

Abstract Haemoglobin (Hb) has been employed as naturally copious metal plagiaristic that attains ... more Abstract Haemoglobin (Hb) has been employed as naturally copious metal plagiaristic that attains the material with sustainable supercapacitance. Herein, a fabrication method in the course of interaction between macromolecule compound Hb with graphite has been reported over stainless steel electrode in the presence of sulphonated polysulphone (SPS) as a binder. The microstructure of fabricated Hb graphite stainless steel (SS) electrode has been ascertained through scanning electron microscopy (SEM). Electrochemical capacitance of electrodes has been examined in KOH solution (1.0 M) with reference to Ag/AgCl at a scan rate 0.001 to 0.2 Vs−1. Developed electrode has shown highest capacitance of 158.43 at scan rate of 0.001 Vs−1 along with energy and power densities of 3.86 Whkg−1 and 237.92 Whkg−1 respectively. In multiple cycles electrode rendered quite slow decrease in electrocapacitive during the first 1000 cycles (at scan rate of 0.1 Vs−1) indicating good charge–discharge with improved electrochemical cyclic stability.

IOP SciNotes, 2020

A microwave (MW) assisted process was evolved to synthesize a series of polymer nanocomposites (P... more A microwave (MW) assisted process was evolved to synthesize a series of polymer nanocomposites (PNCs) through 2,2-azobisisobutyronitrile (AIBN) initiated free radical in situ polymerization of acrylonitrile (AN) in presence of nanobariumtitanate (NBT). The reaction conditions were optimized and microwave power ranging 25 to 100 W over 10 min was found to be most suited for the synthesis of PNCs. Synthesis of PNCs has been ascertained through UV–vis, FTIR spectroscopy and microstructure were investigated through XRD and AFM. TG-DTA-DTG proclaims that PNCs acquire lower moisture content and higher heat resistance as compared to polyacrylonitrile (PAN). The synthesized PNCs have been applied as sensing material to develop electrochemical probe for detection of doxorubicin (DOX). The presence of DOX (0.01%, w/v) in phosphate buffer at pH 7.4 has shown a remarkable increase in the peak current at PNCs modified glassy carbon electrode (GCE). Cyclic voltammetric (CV) studies proof good acc...

$Research paper thumbnail of Modification in mechanical, tribological & electrical properties of epoxy at low weight fraction of multiwalled carbon nanotube$

Materials Today: Proceedings, 2020

Abstract Effect of weight fraction (WF, mg/dL) of multiwalled carbon nanotube (MWCNT) on mechanic... more Abstract Effect of weight fraction (WF, mg/dL) of multiwalled carbon nanotube (MWCNT) on mechanical properties, wear behavior and electrical conductance of epoxy nanocomposites (ENCs) was investigated. For this purpose, a series of ENCs was prepared through curing of epoxy resin with polyamine in presence of various WF of MWCNT ranging 1.0–300, followed by post curing under microwave irradiation to define the ENCs. Effect of WF on dispersion of MWCNT into epoxy matrix and onward formation of ENCs was revealed through spectra, microscopy, stress analysis and DC conductance. Loading of MWCNT up to 200 WF imparts ultimate improvements in Rockwell hardness, compressive, impact, tensile strength and wear resistance of ENCs. Whereas, electrical percolation threshold of ENCs was appeared at 10 WF of MWCNT with electrical insulation at 100 V. Stress analysis under diametric compression ranging 8–20 kgf reveals increase in fringe order of ENCs ranging 0.25–0.45 up to 20 WF of MWCNT. Stress analysis and atomic force microscopy reveals that ENCs with enhanced dispersion and reduced stress may be produced at 20 WF of MWCNT. Present study reveals that ENCs with improved dispersion and reduced internal stress may be produced through loading of 20WF of MWCNT. Whereas, loading of MWCNT up to 200 WF results ENCs with improved mechanical properties, electrical conductance and wear resistance.

Portugaliae Electrochimica Acta, 2020

Carbonaceous materials are used to generate composites for numerous purposes, due to their extrao... more Carbonaceous materials are used to generate composites for numerous purposes, due to their extraordinary properties. In this context, we have carried out a study on the modified properties, viz. thermal stability and specific capacitance of the composites fabricated by the introduction of a carbonaceous material (graphite and graphene oxide) into the Polyvinyl Butyral matrix. Since it has excellent adhesibility and dielectric permittivity, and it can be employed as an electrode in sensors, polyvinyl butyral is used in the current investigation, along with carbonaceous materials, for electrochemical and bandgap properties (HOMO-LUMO) studies. Spectroscopic FT-IR, XRD and SEM analyses remark the comprehensive entanglement of the two components. Various fabricated composites show an increased thermal stability, with a percentage of carbonaceous filler, as suggested by TGA. Cyclic voltammetry studies reveal that PVB acts as an excellent binder, and as a good matrix for the charge movement through it, because it has a good level of dielectric permittivity, thus enabling fabricated materials to be developed as good candidates for supercapacitive batteries.

e-Polymers, 2018

In the present work, a diglycidyl ether of bisphenol A (DGEBA)-based epoxy resin was modified wit... more In the present work, a diglycidyl ether of bisphenol A (DGEBA)-based epoxy resin was modified with the help of a liquid rubber (LR) obtained from the pyrolysis of rubber. Tensile tests on samples of rubber modified epoxy resins (REs) containing varying rubber volume fractions (RVF) were conducted to obtain their tensile properties. Fractographic analysis of fractured samples using field emission scanning electron microscopy (FESEM) revealed the presence of phase separated rubber zones characterized by microvoids, distributed uniformly in the epoxy domain. Young’s modulus and yield strength of REs were observed to drop with RVF. A three-dimensional (3D) finite element model was employed to predict the elastic properties and stress distributions in REs. Various stress distributions and their dependence on the properties of rubber were examined in detail through the model. The effect of rubber properties on bulk elastic properties of the REs were also studied. Lastly, the effective str...

Bulletin of Materials Science, 2019

Conducting polymers have recently been employed with metal derivative macromolecules that have le... more Conducting polymers have recently been employed with metal derivative macromolecules that have led to great improvement in the field of supercapacitor materials. The current work reports on the synthesis of a novel class of haemoglobin/polyindole composites (HPCs) through doping of haemoglobin (Hb) into a polyindole (PIN) matrix. HPCs with enhanced electrocapacitive performance were prepared through a cationic surfactant-assisted dilute solution polymerization of indole (IN) in the presence of Hb at various concentrations ranging from 10 to 30% (w/w) and ferric chloride (FeCl 3) as an oxidant. The HPCs were characterized through Fourier transform infrared spectra, scanning electron microscopy and simultaneous thermogravimetric analysis. Electrochemical capacitance (C s , F g −1) of graphite-based electrodes fabricated from HPCs over stainless steel in the presence of sulphonated polysulphone as a binder has been investigated in KOH solution (1.0 M) with reference to Ag/AgCl at a scan rate (V s −1) ranging from 0.001 to 0.2. HPCs with 30% (w/w) of Hb have shown the highest C s of 294.00 as compared with 112.00 for pure PIN at a scan rate of 0.001 V s −1. Successive scans of HPC electrodes show a capacitive decline of ∼2% during the first 1000 cycles at a scan rate of 0.1 V s −1 in KOH (1.0 M), which indicates the appreciable electrochemical cyclic stability of the HPCs over PIN. Thus, the fabricated HPCs may serve as potential electrode material for development of electrochemical supercapacitors.

Waste management (New York, N.Y.), 2018

The management of electronic waste (e-waste) becomes a global issue in this digital era. Existing... more The management of electronic waste (e-waste) becomes a global issue in this digital era. Existing conventional practices are harmful for dealing with the e-waste, therefore, indigenous soil bacteria were explored for e-waste treatment through enrichment culture approach followed by screening, identification and their bioformulation used for in situ investigation. Soil bacteria were enriched in the presence of e-waste after 30 days of incubation under standard laboratory conditions. This finding was established through λ values that were higher in the case of soil enrichment than the control. The biodegradation of e-waste by the selected strains during enrichment and in situ experiment was confirmed by FTIR, TG-DTG-DTA and SEM analysis. The FTIR spectra evidently support that microbial communities present in the enriched soil has affected the C-chain and used as carbon source for their growth. This chemical structural degradation of e-waste was further substantiated by thermal and SE...

Materials Today: Proceedings, 2018

In the present investigation, a DGEBA based epoxy has been modified by a novel liquid rubber (LR)... more In the present investigation, a DGEBA based epoxy has been modified by a novel liquid rubber (LR) (0-25 wt. %) obtained from the pyrolysis of scrap rubber. Mechanical characterizations viz. tensile, impact and fracture toughness were conducted on the prepared LR modified epoxies (LREs). A reduction in the Young's modulus and tensile strength was observed with LR concentration. Highest increase in impact strength (~ 73 %) and K IC (~79 %) at 15 wt. % LR concentrations was observed in the LREs. FESEM revealed the formation of biphasic morphology and cavitation followed by shear yielding to be the prevalent toughening mechanism. Thermogravimetric analysis revealed that LR addition has negligible effect on the thermal stabilities of epoxy.

Material Science Research India, 2007

In recent decades thermoplastic materials, because of their inherent physical properties and low ... more In recent decades thermoplastic materials, because of their inherent physical properties and low processing temperature have gained significant technological incentives and rapidly replaced more traditional materials such as steel and nonferrous metals, as well as natural polymers such as wood, cotton, and natural rubber. However, apart from a series of weak aspects including resistance against biodegradation, difficulties associated with recycling, melt processing, blending with other polymers, thermoplastic materials have well recognized over steel and other metals. Thermal, mechanical stability and enhanced electrical insulation of these materials impose their wide range of high temperature applications for defence, biomedical engineering, automobile, transportation, textiles and as commodity articles 1-4. Among a wide range of thermoplastic materials, the most widely used are polyethylene,

International Journal of Engineering Research and Applications, 2017

The aim of this article is to present morphological studies on the tensile fractured specimens of... more The aim of this article is to present morphological studies on the tensile fractured specimens of novel liquid rubber obtained from the pyrolysis of scrap rubber. Such a study is crucial for gaining useful insight into the toughening mechanisms existing in rubber modified systems. A DGEBA based epoxy resin was first modified with varying concentrations (0-15 wt. %) of the liquid rubber. Dogbone shaped specimens of the cast plaques of the modified epoxies were tested under uniaxial tensile loading. The fracture surface was elucidated with the help of scanning electron microscopy (SEM). It was observed that biphasic morphology characterized with continuous epoxy phase and microvoids distributed throughout the epoxy domain develop in the modified epoxies. Cavitation of rubber particles under crack tip stresses is the reason behind development of these microvoids. The diameter of these microvoids were analyzed using the image analysis technique and was observed to increase with the concentration of rubber. Prevalent toughening mechanisms were visualized in the SEM micrographs necessary for the development of tougher and more ductile rubber modified epoxy systems.

Materials Chemistry and Physics, 2016

h i g h l i g h t s There is an increase in cell parameters and strain with Ce-content. Samples s... more h i g h l i g h t s There is an increase in cell parameters and strain with Ce-content. Samples show the presence of secondary phase after 1.0% doping level. Ce-ions prefer octahedral sites and charge neutrality is accompanied by Fe þ3 / Fe þ2. Magnetization decreases due to weakening of the super exchange interactions. Squareness and coercivity start to increase with Ce content.