期刊
CHEMICAL ENGINEERING JOURNAL
卷 435, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135159
关键词
2D materials; Interfaces; Membranes; pH-responsive; Tungsten selenide
资金
- National Natural Science Foundation of China (NSFC) [22005012, 22175007, 21975007, 21774005, 51772010]
- National Postdoctoral Program for Innovative Talents [BX20190027]
- China Postdoctoral Science Foundation [2019M650431]
- Shandong Province Natu-ral Science Foundation [ZR2019MEM008]
- National Natural Science Foundation for Outstanding Youth Foundation [B14009]
- Fundamental Research Funds for the Central Universities
- National Program for Support of Top-notch Young Professionals
- Open Project Program of CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry
In this study, a smart pH-responsive nanogating membrane is developed, which allows controllable separation of mixed molecules by regulating the pH-dependent nanochannel size. The membrane exhibits ultrafast water permeability and enhanced antifouling property.
Separation membrane with tunable nanochannels displays desirable performance in water treatment. While designing nanogating membranes with superior permeability and antifouling properties still remains a challenge. Here, we report a smart pH-responsive nanogating membrane by assembling two-dimensional polyacrylic acid (PAA) grafted tungsten selenide (WSe2) nanosheets. The nanochannel size of WSe2/PAA membrane varies with the swell or shrink of PAA chains that are regulated by pH, therefore leads to controllable separation capabilities towards mixed molecules solution. The membrane exhibits ultrafast water permeability because of the expanded interlayer space between WSe2 nanosheets and weak interaction between WSe2 and water molecules. Moreover, by virtue of the photocatalytic characteristic of WSe2, the membrane shows enhanced antifouling property. This WSe2/PAA nanogating membrane has great potential applications in nanofluidics system and complex chemical separation.
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