文献类型：期刊文献

英文题名：Synthesis of ZIF-8 and ZIF-67 nanocrystals with well-controllable size distribution through reverse microemulsions

作者：Sun, Weizhen[1];Zhai, Xiangsu[1];Zhao, Ling[1,2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：289

起止页码：59

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20160201773111);WOS:【SCI-EXPANDED(收录号:WOS:000371559900007)】；

基金：The financial support by the Scientific Research Foundation for the Returned Overseas Chinese Scholars and the 111 Project (B08021) is gratefully acknowledged.

语种：英文

外文关键词：Zeolite imidazole framework; Nano particles; Microemulsion

摘要：With the particles size down to nanoscale, porous materials with well-controllable dimension will have more promising applications in biologically relevant fields and even in the areas of traditional selective separation and catalysis. By using reverse microemulsions the nanoscale zeolitic imidazolate frameworks (ZIFs) such as ZIF-8 and ZIF-67 were synthesized at room temperature with uniform grain size distribution and extremely small crystal dimension (mean particle size less than 5 nm). The ZIF-8 and ZIF-67 synthesized by reverse microemulsion have much larger surface areas and micropores volume than samples obtained from water, but are comparative to those obtained from methanol. The thermal stability of the synthesized ZIF-8 and ZIF-67 by microemulsion is also excellent. The DLS characterization revealed that it is the size of micelles in microemulsion that controls the dimension of ZIF crystals. This is different comparing to the controlling mechanisms of other common synthesis methods of MOFs. We believe that the microemulsion method developed in this work can enrich the synthesis strategies of other nanoscale ZIF or MOF particles. (C) 2015 Elsevier B.V. All rights reserved.