双金属有机骨架材料的制备及其吸附性能研究  

Preparation and adsorption properties of bimetallic organic framework materials

作　　者：孔乾乾 鲁金明[1] 张集 刘毅[1] 杨建华 张艳[1] 王金渠[1] KONG Qian-qian;LU Jin-ming;ZHANG Ji;LIU Yi;YANG Jian-hua;ZHANG Yan;WANG Jin-qu(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《高校化学工程学报》2021年第2期348-354,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：中央高校基本科研业务费(DUT15ZD(G)03,DUT16RC(3)103);国家自然科学基金(21776031)。

摘　　要：为了考察制备方法对双金属有机骨架材料氢气吸附性能的影响,通过直接合成法和金属离子交换法,制备CoNi-MOF-74,利用X射线衍射仪(XRD)、扫描电镜(SEM)、电感耦合等离子发射光谱仪(ICP)和N2物理吸附对材料的结构、形貌等进行表征,测定了77K、100kPa下的氢气吸附性能。结果表明,该制备方法对材料的氢气吸附性能具有重要影响,由直接合成法制备的材料中,当原料液Co、Ni质量比m(Co):m(Ni)为1:1时合成的CoNi-MOF-74具有最佳的氢气吸附量,达到2.12%;比Ni-MOF-74氢气吸附量提高了24.7%,比金属离子交换法制备的最佳材料氢气吸附量高3.4%;该制备工艺简便高效,有利于实现双金属有机骨架材料的规模化制备。In order to investigate the effect of preparation methods on hydrogen adsorption of bimetallic organic frameworks,CoNi-MOF-74 was prepared by direct synthesis and post-synthetic ion exchange methods,respectively.The structure and morphology of the prepared CoNi-MOF-74 were characterized by XRD,SEM,ICP and N2 physical adsorption-desorption isotherm.In addition,hydrogen adsorption performance was further measured at 77 K and 100 kPa.The results show that the preparation method has significant effects on hydrogen adsorption.The hydrogen adsorption capacity of the CoNi-MOF-74 prepared by one-pot synthesis was up to 2.12%(m(Co):m(Ni)=1;1),which was 24.7%higher than Ni-MOF-74 and 3.4%higher than CoNi-MOF-74 prepared by post-synthetic ion exchange.This preparation process is simple and efficient,which is beneficial for large-scale production.

关 键 词：CoNi-MOF-74 直接合成法 金属离子交换法 氢气吸附性能 再生性能 

分 类 号：TQ9[化学工程]