期刊
JOURNAL OF MEMBRANE SCIENCE
卷 564, 期 -, 页码 35-43出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2018.03.077
关键词
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资金
- National Key Research and Development Program of China [2017YFB0306901]
- National Natural Science Foundation of China [21676139]
- Higher Education Natural Science Foundation of Jiangsu Province [15KJA530001]
- State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201604]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- China Regenerative Medicine International (CRMI)
A simple and scalable method was proposed for the preparation of mesoporous membranes by assembling two-dimensional (2D) MXene nanosheets and TiO2 nanoparticles (NPs) on a macroporous support. MXene nanosheets were introduced into TiO2 hydrosol, and then the sol was transformed into gel for fabrication of mesoporous TiO2-MXene membranes. Characterization results confirmed that an assembled structure of TiO2-MXene nanosheets was formed, benefiting from the nanosheets as 'floor tiles', thereby successfully inhibited the sol infiltration to the porous support. As a result, the hydrosols could be directly coated on macroporous substrates (with only one single cycle of aging and calcination) such as a disc support with an average pore size of similar to 100 nm and a four-channel hollow fiber with an average pore size of similar to 00 nm. Filtration experiments revealed the resulted membranes, in particular of the hollow fiber TiO2-MXene membranes, had a narrow pore size distribution, desirable rejection characteristics of dextran and high water permeate flux. The 2D nanosheet assisted TiO2 NPs assembly proposed in this work promises a simple, feasible and scalable approach for fabricating high-performance mesoporous TiO2 membranes.
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