期刊
JOURNAL OF MEMBRANE SCIENCE
卷 650, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2022.120402
关键词
Biomimetic membrane; Dual-functional zone; Organic solvent nanofiltration; High permeance; High stability
资金
- National Natural Science Foundation of China [51978239, 52070068]
- Fundamental Research Funds for the Central Universities
- WorldClass Universities (Disciplines)
- Characteristic Development Guidance Funds for the Central Universities
- National Key Research and Development Project
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
This research successfully constructed a heterostructured dual-functional zone in a lamellar membrane by incorporating MoS2 quantum dots into graphene oxide, which can simultaneously absorb and discharge different solvents, thereby improving the efficiency of solvent transport and demonstrating excellent stability.
Graphene oxide lamellar 2D membranes are widely researched for ion separation and molecular sieving in aqueous solution. Extension of the research of GO-based membranes for organic solvent nanofiltration has drawn much attention but is still in its infancy. The relatively low solvent permeability remains a difficult problem to overcome. Inspired by the shell of the Namib Desert beetle, a heterostructured lamellar membrane was prepared by incorporating MoS2 quantum dots (MQDs) into the graphene oxide membrane. A dual-functional zone was formed, where hydrophilic areas exhibited excellent absorption performance for polar solvents and hydrophobic regions were propitious to the discharge of polar solvents when incorporating a moderate amount (10%) MQDs, denoted as GM-10 (nonpolar solvents presented the opposite performance). The synergistic effects of the dual functional zone successfully improved the transport efficiency for various solvents, and the flux of various solvents for GM-10 was over three times higher than that of the pure GO membrane. Simultaneously, the composite biomimetic membrane showed excellent stability. This paper provides a novel strategy for constructing a heterostructured dual-functional zone for 2D lamellar membrane modification without the sacrifice of rejection, revealing the potential for further optimization of separation performance and membrane stability.
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