管壳式中空纤维膜反应器制备金属有机化合物及其CO_2吸附性能研究  

Synthesis of metal organic framework with enhanced CO_2 adsorption properties using hollow fiber ultrafiltration membrane as nanoreactors

作　　者：郭俊[1] 张春芳[1] 白云翔[1] 顾瑾[1] 孙余凭[1] 

机构地区：[1]江南大学食品胶体与生物技术教育部重点实验室化学与材料工程学院,江苏无锡214122

出　　处：《现代化工》2015年第5期92-95,97,共5页Modern Chemical Industry

基　　金：江苏省产学研前瞻性联合研究项目(BY2013015-06)

摘　　要：采用管壳式中空纤维膜反应器,以去离子水为溶剂,制备了ZIF-8,通过XRD、SEM、BET和CO2吸附实验研究了不同静置时间、反应物配比对ZIF-8粒子晶型、形貌、粒径、比表面积及CO2吸附性能的影响。结果表明:增加Hmim/Zn2+摩尔比有利于ZIF-8粒子的晶型完整,但比表面积则呈现先增加后降低的趋势,在n(Hmim)∶n(Zn2+)=6∶1时达到最大;延长静置时间,ZIF-8粒径逐渐增大,而比表面积与微孔体积则逐渐减小,未静置的ZIF-8粒子具有最优的CO2吸附性能,其平衡吸附量可达0.47 g/g。A method for the synthesis of ZIF-8 by using shell and tube hollow fiber membrane as nanoreactor in DI aqueous solution is introduced. The effects of standing time and the ratios of precursors to the ZIF-8 crystal type, shape and surface area are investigated by XRD, SEM, BET and CO2 gas adsorption experiment. The results indicate that by increasing the mole ratio of Hmim/Znz ＋ , the crystal integrity of ZIF-8 is enhanced. However,the surface area of ZIF-8 is increased at first and then decreased. A maxium value of surface area is obtained when the mole ratio of Hmim/Zn2 ＋ is 6 ： 1. On the other hand, with increasing the stand time, the partical size of ZIF-8 is increased while the surface area and the microporous volume are decreased. The best CO2 gas adsorption performance of ZIF-8 is 0. 47 g/g without standing time.

关 键 词：ZIF 粒子 管壳式 中空纤维膜 CO2吸附 

分 类 号：O643.36[理学—物理化学]