G. Padhye - Academia.edu (original) (raw)

Papers by G. Padhye

Research paper thumbnail of Comprehensive Analysis of g -Radiation Impact on PVA-PTh Composite Films for Enhanced Battery Functionality

Indian journal of science and technology, Dec 21, 2023

Objectives: This research serves to explore the dynamic interaction between γradiation and PVA-PT... more Objectives: This research serves to explore the dynamic interaction between γradiation and PVA-PTh (Polyvinyl alcohol-Polythiophene) composite films with the intent to revolutionize the field of rechargeable batteries. The objective of this study is synthesis of PVA-PTh films and to comprehend the impacts of γ-radiation at various dosage rates with greater emphasis to their electrical characteristics. Methods: Our methodology encompasses the application of a chemical oxidative technique to form PVA-PTh nanocomposite films, followed by an enlightening analysis through SEM, FTIR, AAS, and electrical conductivity measurements after γ-radiation. The fascinating outcomes extend beyond the lab, with the PVA-PTh composite films and their γ-radiated counterparts venturing into the realm of battery development. Findings: The results unveiled are captivating. SEM analysis reveals the emergence of smaller, intricately structured flakes in γ-radiated PVA-PTh composite films, indicating significant morphological changes. FTIR results showcase shifts and new absorption bands at 788 cm-1 and 1031 cm-1 , evidence of chain crosslinking and scission processes triggered by γ-radiation. Surprisingly, although this radiation reduces the iron (Fe) ion content in PVA-PTh films, the electrical conductivities remain unwavering, even when exposed to 30 kGy (kilo Grays) dose. This steadfastness extends to consistent open circuit voltage (Voc) of 0.30 volts, which persists for astonishing duration of approximately 35 minutes in PVA-PTh conducting films. This exceptional stability paves the way for integration of films into cutting-edge polymer battery systems. Novelty: This research unlocks opportunities for innovative applications, invites further exploration across diverse fields by providing groundbreaking insights into the morphology, chemical composition, electrical behavior of PVA-PTh composite films. The exceptional stability of electrical conductivity in γ-radiated PTh samples, even under the harshest radiation conditions, offering testament to their reliability and resilience. These results point towards modern polymer battery systems with consistent Voc and enduring current flow, supporting the PVA-PTh composite films in battery applications.

Research paper thumbnail of Preparation and electrical characterization of a silicone elastomer composite charged with multi-wall carbon nanotubes functionalized with 7-octenyltrichlorosilane

Composites Science and Technology, 2007

A Composite materials from Zn-titanate/borosilicate glass of 10/0(ZT10), 9/1(ZT9), 7/3(ZT7) and 5... more A Composite materials from Zn-titanate/borosilicate glass of 10/0(ZT10), 9/1(ZT9), 7/3(ZT7) and 5/5(ZT5) ratios were prepared. Their XRD, SEM / EDX, electrical and dielectric properties were investigated. Willemite, rutile and Zn 2 TiO 4 composite materials were developed through the sintering process. The incorporation of glass enhances the formation of willemite. The SEM micrographs show clear euhedral micro-size crystals of Zn 2 TiO 4 spinel and willemite embedded in glassy groundmass. The EDX microanalysis shows the incorporation of Al-element into the structure of the formed phases. Both conductivity (σ ac) and dielectric constant (ε), measured within frequency range 0.2 kHz-1 MHz, and temperature range 298-573 (K). Glass-free sample showed the highest σ ac and ε. Although, 5/5 sample exhibited relative higher values than those with 9/1 and 7/3. The dielectric constant of 9/1 and 7/3 and 5/5 samples show almost an independent behavior over a wide range of temperatures which was attributed to the micro-sized grains of crystalline phases and restraining effect of rigid glassy matrix. The results of ac conductivity may indicate the dominance of electronic conduction over the ionic transfer one in the studied samples. Therefore they may present good candidates for semiconductor materials in electronic devices.

Research paper thumbnail of Polypyrrole-silver Nanocomposite : Synthesis and Characterization

Polypyrrole-Silver (PPy-Ag) nanocomposite has been successfully synthesized by the chemical oxida... more Polypyrrole-Silver (PPy-Ag) nanocomposite has been successfully synthesized by the chemical oxidative polymerization of pyrrole with iron (III) chloride as an oxidant, in the presence of a colloidal suspension of silver nanoparticles. Turkevich method (Citrate reduction method) was used for the synthesis of silver nanoparticles (Ag NPs). The silver nanoparticles were characterized by UV-Visible spectroscopy which showed an absorption band at 423 nm confirming the formation of nanoparticles. PPy-Ag nanocomposite was characterized by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) techniques for morphological and structural confirmations. TEM and SEM images revealed that the silver nanoparticles were well dispersed in the PPy matrix. XRD pattern showed that PPy is amorphous but the presence of the peaks at 2θ values of 38.24°, 44.57°, 64.51° and 78.45° corresponding to a cubic phase ...

Research paper thumbnail of Fabrication of a Novel Flexible Room Temperature Hydrogen Sulfide (H2S) Gas Sensor based on Polypyrrole Films

International Journal of Science and Research (IJSR)

Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chl... more Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chloride (FeCl 3) as an oxidant and Pyrrole as a monomer. The ratio of oxidant to monomer was 2.5:1. The polymerization was carried out at ~ 5 °C. The materials were characterized by using SEM, FTIR and XRD. The electrical conductivity was measured by two probe method and was found to be 1.389 × 10-2 S/cm at room temperature. H 2 S gas sensor was fabricated by casting thin films of Polypyrrole on the integrated electrodes, at room temperature. Sensing experiments were performed on these films with the injection of 10 ppm to 100 ppm level H 2 S at room temperature. The response and recovery time were obtained. It was found that, response time decreased from 64 sec to 13 sec as the concentration of H 2 S increased from 10 ppm to 100 ppm, while the recovery time increased from 192 sec to 644 sec. The possible response mechanism is discussed.

Research paper thumbnail of Fabrication of a Novel Flexible Room Temperature Hydrogen Sulfide (H 2 S) Gas Sensor based on Polypyrrole Films

Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chl... more Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chloride (FeCl 3) as an oxidant and Pyrrole as a monomer. The ratio of oxidant to monomer was 2.5:1. The polymerization was carried out at ~ 5 °C. The materials were characterized by using SEM, FTIR and XRD. The electrical conductivity was measured by two probe method and was found to be 1.389 × 10-2 S/cm at room temperature. H 2 S gas sensor was fabricated by casting thin films of Polypyrrole on the integrated electrodes, at room temperature. Sensing experiments were performed on these films with the injection of 10 ppm to 100 ppm level H 2 S at room temperature. The response and recovery time were obtained. It was found that, response time decreased from 64 sec to 13 sec as the concentration of H 2 S increased from 10 ppm to 100 ppm, while the recovery time increased from 192 sec to 644 sec. The possible response mechanism is discussed.

Research paper thumbnail of Comprehensive Analysis of g -Radiation Impact on PVA-PTh Composite Films for Enhanced Battery Functionality

Indian journal of science and technology, Dec 21, 2023

Objectives: This research serves to explore the dynamic interaction between γradiation and PVA-PT... more Objectives: This research serves to explore the dynamic interaction between γradiation and PVA-PTh (Polyvinyl alcohol-Polythiophene) composite films with the intent to revolutionize the field of rechargeable batteries. The objective of this study is synthesis of PVA-PTh films and to comprehend the impacts of γ-radiation at various dosage rates with greater emphasis to their electrical characteristics. Methods: Our methodology encompasses the application of a chemical oxidative technique to form PVA-PTh nanocomposite films, followed by an enlightening analysis through SEM, FTIR, AAS, and electrical conductivity measurements after γ-radiation. The fascinating outcomes extend beyond the lab, with the PVA-PTh composite films and their γ-radiated counterparts venturing into the realm of battery development. Findings: The results unveiled are captivating. SEM analysis reveals the emergence of smaller, intricately structured flakes in γ-radiated PVA-PTh composite films, indicating significant morphological changes. FTIR results showcase shifts and new absorption bands at 788 cm-1 and 1031 cm-1 , evidence of chain crosslinking and scission processes triggered by γ-radiation. Surprisingly, although this radiation reduces the iron (Fe) ion content in PVA-PTh films, the electrical conductivities remain unwavering, even when exposed to 30 kGy (kilo Grays) dose. This steadfastness extends to consistent open circuit voltage (Voc) of 0.30 volts, which persists for astonishing duration of approximately 35 minutes in PVA-PTh conducting films. This exceptional stability paves the way for integration of films into cutting-edge polymer battery systems. Novelty: This research unlocks opportunities for innovative applications, invites further exploration across diverse fields by providing groundbreaking insights into the morphology, chemical composition, electrical behavior of PVA-PTh composite films. The exceptional stability of electrical conductivity in γ-radiated PTh samples, even under the harshest radiation conditions, offering testament to their reliability and resilience. These results point towards modern polymer battery systems with consistent Voc and enduring current flow, supporting the PVA-PTh composite films in battery applications.

Research paper thumbnail of Preparation and electrical characterization of a silicone elastomer composite charged with multi-wall carbon nanotubes functionalized with 7-octenyltrichlorosilane

Composites Science and Technology, 2007

A Composite materials from Zn-titanate/borosilicate glass of 10/0(ZT10), 9/1(ZT9), 7/3(ZT7) and 5... more A Composite materials from Zn-titanate/borosilicate glass of 10/0(ZT10), 9/1(ZT9), 7/3(ZT7) and 5/5(ZT5) ratios were prepared. Their XRD, SEM / EDX, electrical and dielectric properties were investigated. Willemite, rutile and Zn 2 TiO 4 composite materials were developed through the sintering process. The incorporation of glass enhances the formation of willemite. The SEM micrographs show clear euhedral micro-size crystals of Zn 2 TiO 4 spinel and willemite embedded in glassy groundmass. The EDX microanalysis shows the incorporation of Al-element into the structure of the formed phases. Both conductivity (σ ac) and dielectric constant (ε), measured within frequency range 0.2 kHz-1 MHz, and temperature range 298-573 (K). Glass-free sample showed the highest σ ac and ε. Although, 5/5 sample exhibited relative higher values than those with 9/1 and 7/3. The dielectric constant of 9/1 and 7/3 and 5/5 samples show almost an independent behavior over a wide range of temperatures which was attributed to the micro-sized grains of crystalline phases and restraining effect of rigid glassy matrix. The results of ac conductivity may indicate the dominance of electronic conduction over the ionic transfer one in the studied samples. Therefore they may present good candidates for semiconductor materials in electronic devices.

Research paper thumbnail of Polypyrrole-silver Nanocomposite : Synthesis and Characterization

Polypyrrole-Silver (PPy-Ag) nanocomposite has been successfully synthesized by the chemical oxida... more Polypyrrole-Silver (PPy-Ag) nanocomposite has been successfully synthesized by the chemical oxidative polymerization of pyrrole with iron (III) chloride as an oxidant, in the presence of a colloidal suspension of silver nanoparticles. Turkevich method (Citrate reduction method) was used for the synthesis of silver nanoparticles (Ag NPs). The silver nanoparticles were characterized by UV-Visible spectroscopy which showed an absorption band at 423 nm confirming the formation of nanoparticles. PPy-Ag nanocomposite was characterized by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) techniques for morphological and structural confirmations. TEM and SEM images revealed that the silver nanoparticles were well dispersed in the PPy matrix. XRD pattern showed that PPy is amorphous but the presence of the peaks at 2θ values of 38.24°, 44.57°, 64.51° and 78.45° corresponding to a cubic phase ...

Research paper thumbnail of Fabrication of a Novel Flexible Room Temperature Hydrogen Sulfide (H2S) Gas Sensor based on Polypyrrole Films

International Journal of Science and Research (IJSR)

Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chl... more Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chloride (FeCl 3) as an oxidant and Pyrrole as a monomer. The ratio of oxidant to monomer was 2.5:1. The polymerization was carried out at ~ 5 °C. The materials were characterized by using SEM, FTIR and XRD. The electrical conductivity was measured by two probe method and was found to be 1.389 × 10-2 S/cm at room temperature. H 2 S gas sensor was fabricated by casting thin films of Polypyrrole on the integrated electrodes, at room temperature. Sensing experiments were performed on these films with the injection of 10 ppm to 100 ppm level H 2 S at room temperature. The response and recovery time were obtained. It was found that, response time decreased from 64 sec to 13 sec as the concentration of H 2 S increased from 10 ppm to 100 ppm, while the recovery time increased from 192 sec to 644 sec. The possible response mechanism is discussed.

Research paper thumbnail of Fabrication of a Novel Flexible Room Temperature Hydrogen Sulfide (H 2 S) Gas Sensor based on Polypyrrole Films

Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chl... more Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using Ferric Chloride (FeCl 3) as an oxidant and Pyrrole as a monomer. The ratio of oxidant to monomer was 2.5:1. The polymerization was carried out at ~ 5 °C. The materials were characterized by using SEM, FTIR and XRD. The electrical conductivity was measured by two probe method and was found to be 1.389 × 10-2 S/cm at room temperature. H 2 S gas sensor was fabricated by casting thin films of Polypyrrole on the integrated electrodes, at room temperature. Sensing experiments were performed on these films with the injection of 10 ppm to 100 ppm level H 2 S at room temperature. The response and recovery time were obtained. It was found that, response time decreased from 64 sec to 13 sec as the concentration of H 2 S increased from 10 ppm to 100 ppm, while the recovery time increased from 192 sec to 644 sec. The possible response mechanism is discussed.