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Bimal K Banik - One of the best experts on this subject based on the ideXlab platform.
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Microwave-Induced Bismuth Nitrate-Catalyzed MichaelReaction of 3-Amino β-Lactams with Enones
Asian Journal of Chemistry, 2019Co-Authors: Ram Naresh Yadav, Ashok Kumar Srivastava, Bimal K BanikAbstract:Microwave-induced Bismuth Nitrate-catalyzed reaction of 3-amino β-lactams with unsaturated ketones is performed in order to obtain substituted amino β-lactams. Amino β-lactams were obtained through the strategy of [2+2] ketene-imine cycloaddition followed by deprotection of phthalimido β-lactams with ethylene diamine.
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Bismuth Nitrate-induced novel nitration of estradiol: An entry to new anticancer agents
European journal of medicinal chemistry, 2014Co-Authors: Debasish Bandyopadhyay, Gildardo Rivera, Jorge L. Sanchez, Jesse R. Rivera, Jose C. Granados, Adrian M. Guerrero, Fang Mei Chang, Robert K. Dearth, John D. Short, Bimal K BanikAbstract:Direct nitration of estradiol was carried out using metal Nitrates on solid surfaces under mild condition, and a combination of Bismuth Nitrate pentahydrate impregnated KSF clay was found to be the best reagent to synthesize 2- and 4-nitroestradiol effectively. Furthermore, various basic side chains were introduced, through O-linker at C-3, to these nitroestradiols. The ability of these derivatives to cause cytotoxicity in Estrogen Receptor (ER)-positive and ER-negative breast cancer cell lines, as well as cancer cell lines of other origins, was examined. Qualitative structure activity relationship (SAR) has also been studied. We found that a basic side chain containing either a piperidine or morpholine ring, when conjugated to 2-nitroestradiol, was particularly effective at causing cytotoxicity in each of the cancer cell lines examined. Surprisingly, this effective cytotoxicity was even seen in ER-negative breast cancer cells.
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Novel asymmetric synthesis of 3-pyrrole substituted β-lactams through Bismuth Nitrate-catalyzed reaction
2013Co-Authors: Aarif L. Shaikh, Bimal K BanikAbstract:Synthesis of 3-keto-β-lactams has been performed. The reaction of racemic α-keto-βlactams 5a-d with commercially available chiral compounds, trans-4-hydroxy L-proline (6a) and cis-4-hydroxy D-proline (6b) in the presence of catalytic amount of Bismuth Nitrate in ethanol has produced a diastereomeric mixture of β-lactams with a pyrrole ring at the C-3 position. Interestingly, four isomers are obtained with a high level of diastereoselectivity in good yield. The mechanism of the pyrrole-substituted βlactams formation has been proposed. This is the first synthesis of enantiomerically pure β-lactams with pyrrole substituent at C-3 position of azetidin-2-one ring in a single step. The absolute configuration of these β-lactams has been determined.
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Bismuth Nitrate-induced microwave-assisted expeditious synthesis of vanillin from curcumin
Organic and medicinal chemistry letters, 2012Co-Authors: Debasish Bandyopadhyay, Bimal K BanikAbstract:Background Curcumin and vanillin are the two useful compounds in food and medicine. Bismuth Nitrate pentahydrate is an economical and ecofriendly reagent.
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A microwave-assisted Bismuth Nitrate-catalyzed unique route toward 1,4-dihydropyridines.
Molecules (Basel Switzerland), 2012Co-Authors: Debasish Bandyopadhyay, Stephanie Maldonado, Bimal K BanikAbstract:The classical Hantzsch reaction is one of the simplest and most economical methods for the synthesis of biologically important and pharmacologically useful 1,4-dihydropyridine derivatives. Bismuth Nitrate pentahydrate under microwave irradiation is proven to act as a very efficient catalyst for a one-pot, three-component synthesis of 1,4-dihydropyridines in excellent yields from diverse amines/ammonium acetate, aldehydes and 1,3-dicarbonyl compounds within 1-3 min under solvent-free conditions. The present environmentally benign procedure for the synthesis of 1,4-dihydropyridines is suitable for library synthesis and it will find application in the synthesis of potent biologically active molecules. The excellent yield and extreme rapidity of the method is due to a concurrent effect of the catalyst and microwave irradiation.
Baoxue Zhou - One of the best experts on this subject based on the ideXlab platform.
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synthesis of wo3 bivo4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on wo3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B-environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
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Synthesis of WO3/BiVO4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B: Environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
Qingyi Zeng - One of the best experts on this subject based on the ideXlab platform.
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synthesis of wo3 bivo4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on wo3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B-environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
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Synthesis of WO3/BiVO4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B: Environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
Jing Bai - One of the best experts on this subject based on the ideXlab platform.
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synthesis of wo3 bivo4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on wo3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B-environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
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Synthesis of WO3/BiVO4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B: Environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
Ligang Xia - One of the best experts on this subject based on the ideXlab platform.
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synthesis of wo3 bivo4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on wo3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B-environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.
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Synthesis of WO3/BiVO4 photoanode using a reaction of Bismuth Nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation
Applied Catalysis B: Environmental, 2017Co-Authors: Qingyi Zeng, Jing Bai, Ligang Xia, Baoxue ZhouAbstract:Abstract In this work, we developed a novel, facile, cost-effective method based on a reaction of Bismuth Nitrate with peroxovanadate on WO3 nanoplate films to synthesize nanostructured WO3/BiVO4 photoanodes, which prevented the introduction of structural defects in the WO3 substrates that occurs in conventional deposition-annealing (DA) methods, for highly efficient photoelectrocatalytic (PEC) water splitting and degradation of organic pollutants. The method is also versatile, allowing dopants such as Mo to be easily incorporated into BiVO4 structures to improve the charge-transfer properties. Both the amount of BiVO4 and doping level can be tailored by modifying the preparation conditions. The PEC performance of the optimized WO3/BiVO4 photoanode was markedly improved with a photocurrent density of 2.83 mA cm−2, which was 9.43 times that of a BiVO4 photoanode and 2.19 times that of a WO3 photoanode. A Mo-doped WO3/BiVO4 (WO3/Mo-BiVO4) photoanode exhibited a further enhanced photocurrent density of 3.78 mA cm−2. Specifically, a cobalt–phosphate (Co–Pi) co-catalyst decorated WO3/Mo-BiVO4 photoanode showed the highest photocurrent density of 5.38 mA cm−2, which is comparable to the values of reported WO3/BiVO4 photoanodes, with stoichiometric H2 (94.7 μmol cm−2 h−1) and O2 (46.5 μmol cm−2 h−1) evolution. Furthermore, the WO3/Mo-BiVO4 photoanode exhibited efficient performance for PEC degradation of organic pollutants with rate constants of 0.683, 0.385, and 1.05 h−1 for tetracycline hydrochloride, phenol, and Congo red, respectively. Intensity-modulated photocurrent spectroscopy measurements indicated the WO3/BiVO4 photoanode should contain fewer nanostructural defects than the WO3/BiVO4 photoanode prepared using DA methods, possibly because the moderate preparation process avoids the harmful repeated heating-cooling process used in DA.