The Experts below are selected from a list of 1230 Experts worldwide ranked by ideXlab platform
Daoben Hua - One of the best experts on this subject based on the ideXlab platform.
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guanidine and Amidoxime cofunctionalized polypropylene nonwoven fabric for potential uranium seawater extraction with antifouling property
Industrial & Engineering Chemistry Research, 2018Co-Authors: Huijun Zhang, Lixia Zhang, Xiaoli Han, Liangju Kuang, Daoben HuaAbstract:Uranium seawater extraction is strategically important to the sustainable development of nuclear energy. Nevertheless, a challenge remains in uranium enrichment to overcome the microorganisms’ adhesion. In this article, we propose guanidine and Amidoxime cofunctionalized polypropylene nonwoven fabric for potential uranium seawater extraction with an antifouling property. Specifically, glycidyl methacrylate was first grafted onto polypropylene nonwoven fabric under γ-ray irradiation, and then reacted with dicyandiamide, and followed by amidoximation to give the functionalized sorbents. The effect of sorbent dose, contact time, and coexisting ions on uranium adsorption and antibacterial assay were investigated. The sorption equilibrium could be reached with a capacity of 112 mg/g within 5 h at pH 8.0 and 298.15 K. The uranium sorption was not affected by other coexisting ions. The antibacterial assay indicated guanidine and Amidoxime cofunctionalized fabric could efficiently inhibit the adhesion of Gram-neg...
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Guanidine and Amidoxime Cofunctionalized Polypropylene Nonwoven Fabric for Potential Uranium Seawater Extraction with Antifouling Property
2018Co-Authors: Huijun Zhang, Lixia Zhang, Xiaoli Han, Liangju Kuang, Daoben HuaAbstract:Uranium seawater extraction is strategically important to the sustainable development of nuclear energy. Nevertheless, a challenge remains in uranium enrichment to overcome the microorganisms’ adhesion. In this article, we propose guanidine and Amidoxime cofunctionalized polypropylene nonwoven fabric for potential uranium seawater extraction with an antifouling property. Specifically, glycidyl methacrylate was first grafted onto polypropylene nonwoven fabric under γ-ray irradiation, and then reacted with dicyandiamide, and followed by amidoximation to give the functionalized sorbents. The effect of sorbent dose, contact time, and coexisting ions on uranium adsorption and antibacterial assay were investigated. The sorption equilibrium could be reached with a capacity of 112 mg/g within 5 h at pH 8.0 and 298.15 K. The uranium sorption was not affected by other coexisting ions. The antibacterial assay indicated guanidine and Amidoxime cofunctionalized fabric could efficiently inhibit the adhesion of Gram-negative E. coli and have bactericidal functions. In addition, it could be regenerated with high efficiency of uranium adsorption after five cycles. This work indicates that guanidine and Amidoxime cofunctionalized polypropylene nonwoven fabric may be a promising material for uranium seawater extraction
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cationically charged poly Amidoxime grafted polypropylene nonwoven fabric for potential uranium extraction from seawater
Industrial & Engineering Chemistry Research, 2015Co-Authors: Zehua Zeng, Yanqi Wei, Liang Shen, Daoben HuaAbstract:The development of sorbent for uranium seawater extraction is critical for guaranteeing future uranium resources for nuclear energy. An Amidoxime-based cationically charged fibrous sorbent is reported here for potential uranium extraction from seawater. Specially, poly(1-vinylimidazole) was grafted onto polypropylene nonwoven fabric under γ-ray irradiation and was followed by quaternization and amidoximation to give the fibrous sorbent. The sorption could reach equilibrium with a capacity of 119.76 mg U/g within 50 h at pH 8.0 and 298.15 K. Compared with the uncharged sorbent, the cationic sorbent showed faster kinetics, higher selectivity, and larger capacity for uranium extraction. This work indicates that the cationically charged poly(Amidoxime)-grafted nonwoven fabric may be a potential promising sorbent to extract uranium from seawater.
Amol Gupte - One of the best experts on this subject based on the ideXlab platform.
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Microwave Assisted Synthesis of 3,5-Disubstituted 1,2,4-Oxadiazoles from Substituted Amidoximes and Benzoyl Cyanides.
ChemInform, 2013Co-Authors: Shivaji Kandre, Pundlik Rambhau Bhagat, Rajiv Sharma, Amol GupteAbstract:The simple protocol renders possible the synthesis of oxadiazoles including the complex structure (V) via O-carboxyphenyl Amidoxime intermediates.
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Microwave assisted synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from substituted Amidoximes and benzoyl cyanides
Tetrahedron Letters, 2013Co-Authors: Shivaji Kandre, Pundlik Rambhau Bhagat, Rajiv Sharma, Amol GupteAbstract:Abstract We report herein the synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from Amidoximes and substituted or unsubstituted benzoyl cyanides under microwave irradiation. Substituted or unsubstituted O -carboxyphenyl Amidoxime is a key intermediate of this alternative method developed for the synthesis of these heterocycles. These reactions employ simple synthetic protocols devoid of lengthy purification procedures and proceed with good yield.
Wenkai Zhang - One of the best experts on this subject based on the ideXlab platform.
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base mediated one pot synthesis of 1 2 4 oxadiazoles from nitriles aldehydes and hydroxylamine hydrochloride without addition of extra oxidant
Organic and Biomolecular Chemistry, 2016Co-Authors: Wei Wang, Yuanqing Xu, Wenkai Zhang, Tao Ding, Hao Xu, Haibo ChangAbstract:A simple base-mediated one-pot synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from nitriles, aldehydes and hydroxylamine hydrochloride has been developed, in which the aldehydes act as both substrates and oxidants. The reactions include three sequential procedures: base-promoted intermolecular addition of hydroxylamine to nitrile to lead to Amidoxime, treatment of the Amidoxime with an aldehyde to form 4,5-dihydro-1,2,4-oxadiazole, and oxidization of the 4,5-dihydro-1,2,4-oxadiazole by using another aldehyde to afford 1,2,4-oxadiazole. This method represents a direct and simple protocol for the synthesis of 3,5-disubstituted 1,2,4-oxadiazoles.
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copper catalyzed one pot synthesis of 1 2 4 triazoles from nitriles and hydroxylamine
Journal of Organic Chemistry, 2015Co-Authors: Tao Ding, Xiaomi Fang, Wenkai ZhangAbstract:A simple and efficient copper-catalyzed one-pot synthesis of substituted 1,2,4-triazoles through reactions of two nitriles with hydroxylamine has been developed. The protocol uses simple and readily available nitriles and hydroxylamine hydrochloride as the starting materials and inexpensive Cu(OAc)2 as the catalyst, and the corresponding 1,2,4-triazole derivatives are obtained in moderate to good yields. The reactions include sequential intermolecular addition of hydroxylamine to one nitrile to provide Amidoxime, copper-catalyzed treatment of the Amidoxime with another nitrile, and intramolecular dehydration/cyclization. This finding provides a new and useful strategy for synthesis of 1,2,4-triazole derivatives.
Haibo Chang - One of the best experts on this subject based on the ideXlab platform.
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base mediated one pot synthesis of 1 2 4 oxadiazoles from nitriles aldehydes and hydroxylamine hydrochloride without addition of extra oxidant
Organic and Biomolecular Chemistry, 2016Co-Authors: Wei Wang, Yuanqing Xu, Wenkai Zhang, Tao Ding, Hao Xu, Haibo ChangAbstract:A simple base-mediated one-pot synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from nitriles, aldehydes and hydroxylamine hydrochloride has been developed, in which the aldehydes act as both substrates and oxidants. The reactions include three sequential procedures: base-promoted intermolecular addition of hydroxylamine to nitrile to lead to Amidoxime, treatment of the Amidoxime with an aldehyde to form 4,5-dihydro-1,2,4-oxadiazole, and oxidization of the 4,5-dihydro-1,2,4-oxadiazole by using another aldehyde to afford 1,2,4-oxadiazole. This method represents a direct and simple protocol for the synthesis of 3,5-disubstituted 1,2,4-oxadiazoles.
Shivaji Kandre - One of the best experts on this subject based on the ideXlab platform.
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Microwave Assisted Synthesis of 3,5-Disubstituted 1,2,4-Oxadiazoles from Substituted Amidoximes and Benzoyl Cyanides.
ChemInform, 2013Co-Authors: Shivaji Kandre, Pundlik Rambhau Bhagat, Rajiv Sharma, Amol GupteAbstract:The simple protocol renders possible the synthesis of oxadiazoles including the complex structure (V) via O-carboxyphenyl Amidoxime intermediates.
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Microwave assisted synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from substituted Amidoximes and benzoyl cyanides
Tetrahedron Letters, 2013Co-Authors: Shivaji Kandre, Pundlik Rambhau Bhagat, Rajiv Sharma, Amol GupteAbstract:Abstract We report herein the synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from Amidoximes and substituted or unsubstituted benzoyl cyanides under microwave irradiation. Substituted or unsubstituted O -carboxyphenyl Amidoxime is a key intermediate of this alternative method developed for the synthesis of these heterocycles. These reactions employ simple synthetic protocols devoid of lengthy purification procedures and proceed with good yield.