The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
Kajari Kargupta - One of the best experts on this subject based on the ideXlab platform.
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Lithium assisted enhanced hydrogenation of reduced graphene oxide-PANI nanocomposite at room temperature
Diamond and Related Materials, 2018Co-Authors: Shubhanwita Saha, Ananta Sarkar, Saibal Ganguly, Dipali Banerjee, Mousumi Mitra, Kajari KarguptaAbstract:Abstract Present study, first time, reveals that lithium and ethylenediamine assisted Benkeser Reaction enhanced the hydrogenation process where reduced graphene oxide-PANI (G-PANI) nanocomposites act as storage medium. Varying the weight ratio of graphene and PANI, several samples were synthesized and hydrogenated. The reduced graphene oxide-PANI (G-PANI) and hydrogenated reduced graphene oxide-PANI (HG-PANI) nanocomposites were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR) analysis and thermo gravimetric analysis (TGA). The electrical conductivity with the variation of temperature for the nanocomposites has also been studied. The reduced values of electrical conductivity and percent weight loss in TGA suggested that the hydrogenation occurs. The degree of hydrogenation of reduced graphene oxide-PANI estimated by TGA, revealed 11% (30% reduced graphene oxide-PANI) and 16.04% (50% reduced graphene oxide-PANI), hydrogen storage, which is considerably higher than the reported values of hydrogen storage in individual storage materials like, PANI, graphene and carbon nano tube.
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Hydrogen storage on graphene using Benkeser Reaction
International Journal of Energy Research, 2014Co-Authors: Ananta Sarkar, Shubhanwita Saha, Saibal Ganguly, Dipali Banerjee, Kajari KarguptaAbstract:SUMMARY Recently, graphene has received great attention as potential hydrogen storage media. Here, we report a new route to store/chemisorb high content of hydrogen on graphene by employing Benkeser Reaction. Graphene nanosheets are produced via a soft chemistry synthetic route involving oxidation of graphite using Improved method, ultrasonic exfoliation, and chemical reduction by using hydrazine with overnight heat treatment. Graphene is hydrogenated by using lithium in ethylenediamine under Benkeser Reaction at atmospheric pressure and 30 °C. Benkeser Reaction overcomes the liquid ammonia handling and produced multiple layer of graphene attached to the hydrogen atoms. High-resolution transmission electron microscopy and selected area electron diffraction analysis confirm the ordered graphite crystal structure of graphene and reveal the rough, corrugated hydrogenated graphene layers attached by hydrogen atoms. Fourier transformation infrared spectroscopy analysis confirms that hydrogen adsorption occurs at all the ortho, meta, and para positions of aromatic graphene. The degree of hydrogenation of graphene estimated by thermogravimetric analysis reveals 14.67% (weight %) hydrogen storage, which is considerably higher than the earlier reported values of percentage storage achieved using various physisorption and chemisorption techniques. Copyright © 2014 John Wiley & Sons, Ltd.
Ananta Sarkar - One of the best experts on this subject based on the ideXlab platform.
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Lithium assisted enhanced hydrogenation of reduced graphene oxide-PANI nanocomposite at room temperature
Diamond and Related Materials, 2018Co-Authors: Shubhanwita Saha, Ananta Sarkar, Saibal Ganguly, Dipali Banerjee, Mousumi Mitra, Kajari KarguptaAbstract:Abstract Present study, first time, reveals that lithium and ethylenediamine assisted Benkeser Reaction enhanced the hydrogenation process where reduced graphene oxide-PANI (G-PANI) nanocomposites act as storage medium. Varying the weight ratio of graphene and PANI, several samples were synthesized and hydrogenated. The reduced graphene oxide-PANI (G-PANI) and hydrogenated reduced graphene oxide-PANI (HG-PANI) nanocomposites were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR) analysis and thermo gravimetric analysis (TGA). The electrical conductivity with the variation of temperature for the nanocomposites has also been studied. The reduced values of electrical conductivity and percent weight loss in TGA suggested that the hydrogenation occurs. The degree of hydrogenation of reduced graphene oxide-PANI estimated by TGA, revealed 11% (30% reduced graphene oxide-PANI) and 16.04% (50% reduced graphene oxide-PANI), hydrogen storage, which is considerably higher than the reported values of hydrogen storage in individual storage materials like, PANI, graphene and carbon nano tube.
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Hydrogen storage on graphene using Benkeser Reaction
International Journal of Energy Research, 2014Co-Authors: Ananta Sarkar, Shubhanwita Saha, Saibal Ganguly, Dipali Banerjee, Kajari KarguptaAbstract:SUMMARY Recently, graphene has received great attention as potential hydrogen storage media. Here, we report a new route to store/chemisorb high content of hydrogen on graphene by employing Benkeser Reaction. Graphene nanosheets are produced via a soft chemistry synthetic route involving oxidation of graphite using Improved method, ultrasonic exfoliation, and chemical reduction by using hydrazine with overnight heat treatment. Graphene is hydrogenated by using lithium in ethylenediamine under Benkeser Reaction at atmospheric pressure and 30 °C. Benkeser Reaction overcomes the liquid ammonia handling and produced multiple layer of graphene attached to the hydrogen atoms. High-resolution transmission electron microscopy and selected area electron diffraction analysis confirm the ordered graphite crystal structure of graphene and reveal the rough, corrugated hydrogenated graphene layers attached by hydrogen atoms. Fourier transformation infrared spectroscopy analysis confirms that hydrogen adsorption occurs at all the ortho, meta, and para positions of aromatic graphene. The degree of hydrogenation of graphene estimated by thermogravimetric analysis reveals 14.67% (weight %) hydrogen storage, which is considerably higher than the earlier reported values of percentage storage achieved using various physisorption and chemisorption techniques. Copyright © 2014 John Wiley & Sons, Ltd.
Shubhanwita Saha - One of the best experts on this subject based on the ideXlab platform.
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Lithium assisted enhanced hydrogenation of reduced graphene oxide-PANI nanocomposite at room temperature
Diamond and Related Materials, 2018Co-Authors: Shubhanwita Saha, Ananta Sarkar, Saibal Ganguly, Dipali Banerjee, Mousumi Mitra, Kajari KarguptaAbstract:Abstract Present study, first time, reveals that lithium and ethylenediamine assisted Benkeser Reaction enhanced the hydrogenation process where reduced graphene oxide-PANI (G-PANI) nanocomposites act as storage medium. Varying the weight ratio of graphene and PANI, several samples were synthesized and hydrogenated. The reduced graphene oxide-PANI (G-PANI) and hydrogenated reduced graphene oxide-PANI (HG-PANI) nanocomposites were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR) analysis and thermo gravimetric analysis (TGA). The electrical conductivity with the variation of temperature for the nanocomposites has also been studied. The reduced values of electrical conductivity and percent weight loss in TGA suggested that the hydrogenation occurs. The degree of hydrogenation of reduced graphene oxide-PANI estimated by TGA, revealed 11% (30% reduced graphene oxide-PANI) and 16.04% (50% reduced graphene oxide-PANI), hydrogen storage, which is considerably higher than the reported values of hydrogen storage in individual storage materials like, PANI, graphene and carbon nano tube.
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Hydrogen storage on graphene using Benkeser Reaction
International Journal of Energy Research, 2014Co-Authors: Ananta Sarkar, Shubhanwita Saha, Saibal Ganguly, Dipali Banerjee, Kajari KarguptaAbstract:SUMMARY Recently, graphene has received great attention as potential hydrogen storage media. Here, we report a new route to store/chemisorb high content of hydrogen on graphene by employing Benkeser Reaction. Graphene nanosheets are produced via a soft chemistry synthetic route involving oxidation of graphite using Improved method, ultrasonic exfoliation, and chemical reduction by using hydrazine with overnight heat treatment. Graphene is hydrogenated by using lithium in ethylenediamine under Benkeser Reaction at atmospheric pressure and 30 °C. Benkeser Reaction overcomes the liquid ammonia handling and produced multiple layer of graphene attached to the hydrogen atoms. High-resolution transmission electron microscopy and selected area electron diffraction analysis confirm the ordered graphite crystal structure of graphene and reveal the rough, corrugated hydrogenated graphene layers attached by hydrogen atoms. Fourier transformation infrared spectroscopy analysis confirms that hydrogen adsorption occurs at all the ortho, meta, and para positions of aromatic graphene. The degree of hydrogenation of graphene estimated by thermogravimetric analysis reveals 14.67% (weight %) hydrogen storage, which is considerably higher than the earlier reported values of percentage storage achieved using various physisorption and chemisorption techniques. Copyright © 2014 John Wiley & Sons, Ltd.
Saibal Ganguly - One of the best experts on this subject based on the ideXlab platform.
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Lithium assisted enhanced hydrogenation of reduced graphene oxide-PANI nanocomposite at room temperature
Diamond and Related Materials, 2018Co-Authors: Shubhanwita Saha, Ananta Sarkar, Saibal Ganguly, Dipali Banerjee, Mousumi Mitra, Kajari KarguptaAbstract:Abstract Present study, first time, reveals that lithium and ethylenediamine assisted Benkeser Reaction enhanced the hydrogenation process where reduced graphene oxide-PANI (G-PANI) nanocomposites act as storage medium. Varying the weight ratio of graphene and PANI, several samples were synthesized and hydrogenated. The reduced graphene oxide-PANI (G-PANI) and hydrogenated reduced graphene oxide-PANI (HG-PANI) nanocomposites were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR) analysis and thermo gravimetric analysis (TGA). The electrical conductivity with the variation of temperature for the nanocomposites has also been studied. The reduced values of electrical conductivity and percent weight loss in TGA suggested that the hydrogenation occurs. The degree of hydrogenation of reduced graphene oxide-PANI estimated by TGA, revealed 11% (30% reduced graphene oxide-PANI) and 16.04% (50% reduced graphene oxide-PANI), hydrogen storage, which is considerably higher than the reported values of hydrogen storage in individual storage materials like, PANI, graphene and carbon nano tube.
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Hydrogen storage on graphene using Benkeser Reaction
International Journal of Energy Research, 2014Co-Authors: Ananta Sarkar, Shubhanwita Saha, Saibal Ganguly, Dipali Banerjee, Kajari KarguptaAbstract:SUMMARY Recently, graphene has received great attention as potential hydrogen storage media. Here, we report a new route to store/chemisorb high content of hydrogen on graphene by employing Benkeser Reaction. Graphene nanosheets are produced via a soft chemistry synthetic route involving oxidation of graphite using Improved method, ultrasonic exfoliation, and chemical reduction by using hydrazine with overnight heat treatment. Graphene is hydrogenated by using lithium in ethylenediamine under Benkeser Reaction at atmospheric pressure and 30 °C. Benkeser Reaction overcomes the liquid ammonia handling and produced multiple layer of graphene attached to the hydrogen atoms. High-resolution transmission electron microscopy and selected area electron diffraction analysis confirm the ordered graphite crystal structure of graphene and reveal the rough, corrugated hydrogenated graphene layers attached by hydrogen atoms. Fourier transformation infrared spectroscopy analysis confirms that hydrogen adsorption occurs at all the ortho, meta, and para positions of aromatic graphene. The degree of hydrogenation of graphene estimated by thermogravimetric analysis reveals 14.67% (weight %) hydrogen storage, which is considerably higher than the earlier reported values of percentage storage achieved using various physisorption and chemisorption techniques. Copyright © 2014 John Wiley & Sons, Ltd.
Dipali Banerjee - One of the best experts on this subject based on the ideXlab platform.
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Lithium assisted enhanced hydrogenation of reduced graphene oxide-PANI nanocomposite at room temperature
Diamond and Related Materials, 2018Co-Authors: Shubhanwita Saha, Ananta Sarkar, Saibal Ganguly, Dipali Banerjee, Mousumi Mitra, Kajari KarguptaAbstract:Abstract Present study, first time, reveals that lithium and ethylenediamine assisted Benkeser Reaction enhanced the hydrogenation process where reduced graphene oxide-PANI (G-PANI) nanocomposites act as storage medium. Varying the weight ratio of graphene and PANI, several samples were synthesized and hydrogenated. The reduced graphene oxide-PANI (G-PANI) and hydrogenated reduced graphene oxide-PANI (HG-PANI) nanocomposites were characterized by high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR) analysis and thermo gravimetric analysis (TGA). The electrical conductivity with the variation of temperature for the nanocomposites has also been studied. The reduced values of electrical conductivity and percent weight loss in TGA suggested that the hydrogenation occurs. The degree of hydrogenation of reduced graphene oxide-PANI estimated by TGA, revealed 11% (30% reduced graphene oxide-PANI) and 16.04% (50% reduced graphene oxide-PANI), hydrogen storage, which is considerably higher than the reported values of hydrogen storage in individual storage materials like, PANI, graphene and carbon nano tube.
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Hydrogen storage on graphene using Benkeser Reaction
International Journal of Energy Research, 2014Co-Authors: Ananta Sarkar, Shubhanwita Saha, Saibal Ganguly, Dipali Banerjee, Kajari KarguptaAbstract:SUMMARY Recently, graphene has received great attention as potential hydrogen storage media. Here, we report a new route to store/chemisorb high content of hydrogen on graphene by employing Benkeser Reaction. Graphene nanosheets are produced via a soft chemistry synthetic route involving oxidation of graphite using Improved method, ultrasonic exfoliation, and chemical reduction by using hydrazine with overnight heat treatment. Graphene is hydrogenated by using lithium in ethylenediamine under Benkeser Reaction at atmospheric pressure and 30 °C. Benkeser Reaction overcomes the liquid ammonia handling and produced multiple layer of graphene attached to the hydrogen atoms. High-resolution transmission electron microscopy and selected area electron diffraction analysis confirm the ordered graphite crystal structure of graphene and reveal the rough, corrugated hydrogenated graphene layers attached by hydrogen atoms. Fourier transformation infrared spectroscopy analysis confirms that hydrogen adsorption occurs at all the ortho, meta, and para positions of aromatic graphene. The degree of hydrogenation of graphene estimated by thermogravimetric analysis reveals 14.67% (weight %) hydrogen storage, which is considerably higher than the earlier reported values of percentage storage achieved using various physisorption and chemisorption techniques. Copyright © 2014 John Wiley & Sons, Ltd.