文献类型：期刊文献

英文题名：Ionic liquid-assisted growth of Cu3(BTC)2 nanocrystals on graphene oxide sheets: Towards both high capacity and high rate for CO2 adsorption

作者：Bian, Zijun;Zhu, Xiang;Jin, Tian;Gao, Jie;Hu, Jun[1];Liu, Honglai

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2014

卷号：200

起止页码：159

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20151000619392);WOS:【SCI-EXPANDED(收录号:WOS:000343630100021)】；

基金：This work is supported by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (Nos. 21176066, 21376074, 91334203), the 111 Project of Ministry of Education of China (No. B08021), the program of FP7-PEOPLE-2013-IRSES (PIRSES-GA-2013-612230) and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：GO-IL/MOF composite; CO2 adsorption separation; Adsorption capacity; Adsorption rate; Stability

摘要：Hierarchical porous metal organic framework (MOF) composites are highly demanded because they can keep the high activity and good transport property simultaneously. A novel method of ionic liquidassisted growth of Cu-3(BTC)(2) on graphene oxide (GO) sheets was proposed and applied to improve both CO2 adsorption capacity and adsorption rate. Three ionic liquids (ILs) of triethylene tetramine acetate (TETA-Ac), triethylene tetramine tetrafluoroborate (TETA-BF4) and 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) were used to investigate the effects of cations and anions of ILs on the structure of GO-IL/MOF composite. With amine or imidazole cations adsorbed at the surface of GO and the contrary anions closely attached, GO-ILs can provide a lot of active sites for the absorption of Cu2+ cations through the coordination. Just like a bridge, ILs assisted the initial growth of the first seed layer of Cu-3(BTC)(2) on the surface of GO. Among various GO-IL/MOP composites, GO-TAc/MOF-60 sample showed a superimposed structure, which lead to more accessible adsorption activity sites and shorten the transfer distance. Also, the GO sheets in GO-IL/MOF provide channels for faster transfer. It showed a high CO2 adsorption capability of 5.62 mmol/g at 25 degrees C and 100 kPa, and a high CO2 kinetic separation performance as well. More importantly, the composite presented a quite good cyclic adsorption/desorption stability. The relations between the specific structures of the composites and the CO2 adsorption behaviors were tentatively demonstrated to reveal a convenient way for designing and fabricating hierarchical MOF composites. (C) 2014 Elsevier Inc. All rights reserved.