ZnO/BiOCl/GO/PVDF复合膜去除水溶性污染物性能研究

摘要/Abstract

摘要： 本文通过浸没沉淀相转换法制备了具有整体式结构的氧化锌/氯氧化铋/氧化石墨烯/聚偏氟乙烯(ZnO/BiOCl/GO/PVDF)复合膜,以亚甲基蓝(MB)、罗丹明(RhB)和四环素(TC)为目标污染物验证了复合膜的光催化降解性能,通过XRD、SEM等测试方法对复合膜进行测试。结果表明,氯氧化铋(BiOCl)的薄片结构提供更多的活性位点,氧化石墨烯(GO)的褶皱状结构有利于ZnO的结合,有助于光催化效果的提升。同时ZnO与BiOCl形成p-n异质结,扩大复合材料的可见光响应范围,在可见光照射下,180 min时对RhB的去除率达95.5%,140 min时对TC的去除率达93.1%以上,能够基本去除污染物;循环使用5次后,复合膜对MB的降解率仍达97.8%。在“双碳”背景下,本文制备的具有整体式结构的ZnO/BiOCl/GO/PVDF复合膜可作为一种环保、稳定、经济的光催化剂,用于去除MB等水溶性污染物,该复合膜在整体式结构催化剂降解水溶性污染物废水中具有广阔的应用前景。

关键词: ZnO, BiOCl, 整体式结构, 复合膜, 双碳, 光催化, 水溶性污染物

Abstract: In this work, monolithic zinc oxide/bismuth oxychloride/graphite oxide/polyvinylidene fluoride (ZnO/BiOCl/GO/PVDF) composite membrane was prepared by immersion precipitation phase transition method. The photocatalytic degradation performance of the composite membrane was verified by using methylene blue (MB), rhodamine (RhB) and tetracycline (TC) as target pollutants, and the composite membrane was tested by XRD, SEM and other testing methods. The results show that the thin sheet structure of bismuth oxychloride (BiOCl) provides more active sites, the fold-like structure of graphene oxide (GO) facilitates the adhesion of ZnO, which contributes to the improvement of photocatalytic effect. Meanwhile, ZnO combines with BiOCl to form p-n heterojunction structure, expanding the visible light response range of the composite material. Under the irradiation of visible light, the removal rate of RhB reaches 95.5% at 180 min, and the removal rate of TC reaches more than 93.1% at 140 min, which can achieve the basic removal of pollutants. The degradation rate of MB by the composite membrane still reaches 97.8% after 5 times of recycling. Under the background of “double carbon”, the monolithic ZnO/BiOCl/GO/PVDF composite membrane prepared in this work can be used as an environmentally friendly, stable and economical photocatalyst for the removal of water-soluble pollutants such as MB, and the composite membrane has a broad application prospect in the degradation of water-soluble pollutant wastewater by monolithic catalyst.

Key words: ZnO, BiOCl, monolithic structure, composite membrane, double carbon, photocatalysis, water-soluble pollutant

中图分类号:

X703

李雪英, 张利, 关杰, 陈思邈, 于伟. ZnO/BiOCl/GO/PVDF复合膜去除水溶性污染物性能研究[J]. 硅酸盐通报, 2023, 42(8): 2994-3004.

LI Xueying, ZHANG Li, GUAN Jie, CHEN Simiao, YU Wei. Performance of ZnO/BiOCl/GO/PVDF Composite Membrane to Remove Water-Soluble Pollutants[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(8): 2994-3004.

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