文献类型：期刊文献

英文题名：High-throughput droplet microfluidic synthesis of hierarchical metal-organic framework nanosheet microcapsules

作者：Wu, Songting[1];Xin, Zhong[1];Zhao, Shicheng[1];Sun, Shengtong[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Donghua Univ, Natl Engn Res Ctr Dyeing & Finishing Text, Ctr Adv Low Dimens Mat, 2999 North Renmin Rd, Shanghai 201620, Peoples R China

年份：2019

卷号：12

期号：11

起止页码：2736

外文期刊名：NANO RESEARCH

收录：;EI(收录号：20193707416820);WOS:【SCI-EXPANDED(收录号:WOS:000494681100007)】；

语种：英文

外文关键词：metal-organic framework nanosheet; droplet microfluidics; microcapsule; hierarchical structure

摘要：Using two-dimensional (2D) metal-organic framework (MOF) nanosheets as new building blocks to create more complex architectures at the mesoscopic/macroscopic scale has attracted extensive interest in recent years. Nevertheless, it remains a great challenge to assemble MOF nanosheets into hierarchical hollow structures so far. In this paper, we describe a successful example of hierarchical MOF nanosheet microcapsules, with precisely controlled sizes, produced on large scale within minutes with a continuous droplet microfluidic strategy. Following a reaction/diffusion growth mechanism, the microcapsule shells feature a continuous smooth inner layer and a porous outer layer. Such hierarchical structure enables the encapsulation of magnetite nanoparticles inside and loading of dense gold nanoparticles outside the microcapsules, which exhibit highly efficient heterogeneous catalytic activity and easy recyclability. The present microfluidic assembly method offers a new pathway for preparing hierarchical MOF nanosheet structures, with the potential for extension to the formation of other 2D nanosheets in general.