期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 144, 期 14, 页码 6483-6492出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c01263
关键词
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资金
- National Key Research and Development Plan of China [2020YFA0211002]
- Innovative Research Groups of the National Natural Science Foundation of China [21921006]
- Fok Ying Tung Education Foundation [171062]
- Jiangsu Provincial Natural Science Foundation [BK20190037, BK20211261]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
This study utilizes the host-guest recognition properties of CB[7] to protect viologen derivatives and assemble them into a smart nanofiltration membrane. The resulting membrane shows improved rejection performance, recovery accuracy, and anti-fouling properties.
Smart voltage-gated nanofiltration membranes haveenormous potential for on-demand and precise separation ofsimilar molecules, which is an essential element of sustainable waterpurification and resource recovery. However, the existing voltage-gated membranes are hampered by limited selectivity, stability, andscalability due to electroactive monomer dimerization. Here, for thefirst time, the host-guest recognition properties of cucurbit[7]uril(CB[7]) are used to protect the viologen derivatives and promotetheir assembly into the membrane by interfacial polymerization.Viologen functions as a voltage switch, whereas CB[7] complex-ation prevents its dimerization and improves its redox stability. Theinhibited diffusion of the CB[7]-viologen complex enables theprecise patterning of the surface structure. The resultant voltage-gated membrane displays 80% improved rejection performance, excellent recovery accuracy for similar molecules, and anti-foulingproperties. This work not only provides an innovative strategy for the preparation of voltage-gated smart nanofiltration membranesbut also opens up new avenues for ion-selective transmission in water treatment, bionic ion channels, and energy conversion.
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