Herein,a dendritic fibrous nanosilica(DFNS)-based adsorbent was constructed through bio-inspired bifunctional stimulation as a rapid and efficient trap for uranium(VI).Amino-amidoxime bifunctional polyacrylonitrile(AO...Herein,a dendritic fibrous nanosilica(DFNS)-based adsorbent was constructed through bio-inspired bifunctional stimulation as a rapid and efficient trap for uranium(VI).Amino-amidoxime bifunctional polyacrylonitrile(AOPNI-NH_(2))firmly adhered to the DFNS substrate through the polymerization of musselinspired dopamine(DA)with a large amount of amine and carbonyl groups.Meanwhile,the amine group of the introduced AOPNI-NH_(2)not only suppressed the ring-closing reaction of amidoxime groups to increase the active sites,but also improved their adsorption rate.The adsorption amount of U(VI)on asprepared DFNS/pDA/AOPNI-NH_(2)reached q_(m)=678 mg g^(-1),which represented a 118%increase compared with the original DFNS under the same conditions.Finally,the adsorption capacity demonstrated the potential for the application of this adsorbent in a seawater environment.展开更多
基金National Natural Science Foundation of China[NSFC 51872057]Application Technology Research and Development Plan of Heilongjiang Province[GX16A009]+1 种基金Fundamental Research Funds of the Central University[HEUCFZ]Natural Science Foundation of Heilongjiang Province[QC2018010]。
文摘Herein,a dendritic fibrous nanosilica(DFNS)-based adsorbent was constructed through bio-inspired bifunctional stimulation as a rapid and efficient trap for uranium(VI).Amino-amidoxime bifunctional polyacrylonitrile(AOPNI-NH_(2))firmly adhered to the DFNS substrate through the polymerization of musselinspired dopamine(DA)with a large amount of amine and carbonyl groups.Meanwhile,the amine group of the introduced AOPNI-NH_(2)not only suppressed the ring-closing reaction of amidoxime groups to increase the active sites,but also improved their adsorption rate.The adsorption amount of U(VI)on asprepared DFNS/pDA/AOPNI-NH_(2)reached q_(m)=678 mg g^(-1),which represented a 118%increase compared with the original DFNS under the same conditions.Finally,the adsorption capacity demonstrated the potential for the application of this adsorbent in a seawater environment.
