Study on Preparation and Catalytic Properties of Hydrophobic ZnS/PVDF Composite Membrane Materials

ZHANG Qiong, ZHI Fangfang

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (02) : 86-90. DOI: 10.15925/j.cnki.issn1005-3360.2025.02.016
Processing and Application

Study on Preparation and Catalytic Properties of Hydrophobic ZnS/PVDF Composite Membrane Materials

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Abstract

In this study, ZnS/PVDF composite membrane materials were prepared by blending and modifying a certain amount of Zinc sulfide (ZnS) photocatalyst on a hydrophobic polyvinylidene fluoride (PVDF) membrane, and their hydrophilicity, catalytic activity and catalytic mechanism were discussed. The results showed that the composite membrane material with 6% mass fraction of ZnS (ZnS/PVDF-3) had the best performance in terms of hydrophilicity, permeability, separation performance and anti-fouling performance, and its pure water flux could reach 302.5 L/(m2‧h), and the rejection rate of bovine serum protein (BSA) could reach 92.5%. In terms of anti-fouling performance, ZnS/PVDF-3 is able to achieve a flux recovery rate of 70.6%. In the photocatalytic degradation performance test, compared with pure PVDF membranes, ZnS/PVDF-3 can also maintain excellent degradation effects, with degradation rates of 90.2% and 91.1% for methyl orange and Congo red dyes, respectively. In the durability test, the ZnS/PVDF-3 showed excellent cycle catalytic effect and acid and alkali resistance, and the degradation rate of more than 75% could be maintained after five cycles or under the condition of solution pH value of 2~14. The study indicates that ZnS/PVDF composite membrane material can be widely used in degrading dye wastewater.

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ZnS / PVDF composite membrane / Photocatalysis / Durability

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ZHANG Qiong , ZHI Fangfang. Study on Preparation and Catalytic Properties of Hydrophobic ZnS/PVDF Composite Membrane Materials. Plastics Science and Technology. 2025, 53(02): 86-90 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.02.016

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