文献类型：期刊文献

英文题名：Two-dimensional heterogenous channels incorporated by enhanced-surface hydrophilic hollow ZIF-8 nanocrystals for ultrafast water permeation

作者：Dai, Liheng[1];Huang, Kang[2];Xiong, Zhaodi[1];Qu, Kai[1];Wang, Yixing[1];Pang, Sichen[1];Zhang, Dezhu[2];Xu, Fang[1];Lei, Linfeng[1];Guo, Xuhong[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Peoples R China

年份：2022

卷号：661

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20223512629836);WOS:【SCI-EXPANDED(收录号:WOS:000854235700006)】；

基金：Acknowledgements The authors gratefully acknowledge the research funding provided by National Key R & D Program of China (Grant Nos. 2021YFB3801301) and National Natural Science Foundation of China (Grant Nos. 22075076, 21908054, 21908098) .

语种：英文

外文关键词：Graphene oxide; Two-dimensional membrane; Water transport; Zeolitic imidazolate framework; Porous channels

摘要：Two-dimensional (2D) interlayer confined channels of graphene oxide (GO) membrane and their potential for ultrafast water molecules transport behavior have drawn substantial interest for advanced water-related membrane separation process. However, the water transfer pathways along the edge-to-edge slits to interlayer channels of adjacent GO nanosheets are still very tortuous, leading to low-efficiency water permeation. Herein, we designed and prepared hollow zeolitic imidazolate framework-8 nanocrystals with enhanced hydrophilic surface (DP@HZIF-8), and then they were incorporated into GO membrane to introduce more nanofluidic channels. More importantly, the enhanced-surface hydrophilicity could well capture water molecules and make them diffuse along the porous multi-pathways of DP@HZIF-8 and interlayer channels of GO, further reducing mass transfer resistance and improving water transfer efficiency under highly-water chemical potential driving force in membrane microregion. As-prepared DP@HZIF-8/GO membrane on polyethersulfone (PES) substrate with optimum structure showed the pure water flux as high as 32.11 kg m(-2) h(-1) at 323 K, and meanwhile exhibited superior pervaporation dehydration performance of butanol/water mixture with total flux of 5.32 kg m(-2) h(-1) and separation factor of 3567 at 343 K, respectively. This work strengthens the understanding of high-efficiency water transport along multi-dimensional heterogenous channels in advanced 2D separation membranes.