期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 618, 期 -, 页码 483-495出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.03.106
关键词
Magnetic Ni@UiO-66; Magnetic field; Membrane fouling; Photocatalytic self-cleaning; XDLVO theory
资金
- Zhejiang Outstanding Youth Fund [LR22E080007]
- National Natural Science Foundation of China [52070170, 51978628]
- Zhejiang Provincial Ten Thousand Talent Program [ZJWR0302055]
In this study, a PES-Ni@UiO-66 membrane was prepared by coating UiO-66 with magnetic Ni and incorporating it into the PES membrane matrix. The distribution of magnetic Ni@UiO-66 was controlled by an external magnetic field, and the hydrophilic Ni@UiO-66 was pulled onto the membrane surface, resulting in a membrane with higher hydrophilicity and superior water permeability. Moreover, the membrane exhibited excellent photocatalytic self-cleaning ability and antifouling performance due to the photocatalytic activity of the exposed Ni@UiO-66 on the membrane surface.
Metal-organic frameworks (MOFs) have been considered as promising nanofillers to fabricate mixed matrix membranes for water treatment. However, manipulating distribution of MOFs nanoparticles in the membrane matrix remains a great challenge. In this study, UiO-66 was firstly coated by magnetic Ni via an in-situ reduction reaction, and then incorporated into polyethersulfone (PES) membrane matrix to prepare PES-Ni@UiO-66 membrane. The magnetic Ni allowed to manipulate the distribution of magnetic Ni@UiO-66 in the phase-inversion process by an external magnetic field. The hydrophilic Ni@UiO-66 can be pulled onto membrane surface by the magnetic force, endowing the prepared membrane with rather higher hydrophilicity. The prepared membrane exhibited superior water permeability with a pure water flux of 611.5 +/- 19.8 L.m(-2)h(-1) and improved antifouling performance. Moreover, benifiting from photocatalytic activity of the exposed Ni@UiO-66 on membrane surface, the obtained PES-Ni@UiO-66 membrane demonstrated excellent photocatalytic self-cleaning ability with a flux recovery rate (FRR) higher than 95% under UV irradiation. Analyzing by extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory indicated that the improved antifouling performance could be attributed to less attractive or even repulsive interaction between the prepared membrane and pollutants. This work provided valuable guidance for structural regulation and development of high-performance MOFs-based membranes for water treatment. (C) 2022 Published by Elsevier Inc.
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