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    PVDF composite membrane with robust UV-induced self-cleaning performance for durable oil/water emulsions separation

    Year: 2020

    Journal: J. Taiwan Inst. Chem. Eng., Volume 110, MAY, page 130–139

    Authors: Wang, Qianqian; Cui, Jiuyun; Xie, Atian; Lang, Jihui; Li, Chunxiang; Yan, Yongsheng

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21776110, 51803080]; Natural Science Foundation of Jiangsu ProvinceNatural Science Foundation of Jiangsu Province [BK20180886, BK20171315, BK20181230, BK20181229, BK20180192]

    Keywords: ZnO nanorods; Hydrothermal reaction; Self-cleanable composite membrane; Oil/water emulsions separation

    Membranes with special wettability (superhydrophobic/superoleophilic or superhydrophilic/superoleophobic) had been introduced to separate oil/water emulsions. Nevertheless, the surface or pore canals of membrane easily fouled by oily wastewater are the tough challenges towards longtime application. In this work, a PVDF@PDA@ZnO membrane was firstly fabricated via growth of ZnO nanoparticles from ZnO seeds planted on the PVDF@PDA membrane. This PVDF@PDA@ZnO membrane showed good separation capability for various emulsions (which the separation efficiencies and fluxes were up to 99.1% and 654 L m(-2) h(-1) , respectively). The degradation rate of MB solution treated by the composite membrane was almost 100% attributing to the excellent photocatalytic ability of ZnO. Moreover, the composite membrane could maintain high efficiency (above 99.27%) after long-time emulsions separation/UV-light irradiation, which displayed superior UV-driven self-cleaning and oxidation resistance performance. This self-cleanable composite membrane possessed durability and held high promise for long-time oil/water emulsions separation. (C) 2020 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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