水流驱动的MoS<sub>2</sub>/PVDF多孔膜降解水中四环素机理

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摘要以过氧单硫酸盐(PMS)为基础的高级氧化工艺(AOPs)中,高效活化和利用PMS是去除有机污染物的一个重要目标.因此,本研究将水流驱动的压电效应引入到PMS活化中,利用制备的MoS₂/PVDF膜作为压电催化膜,以去除水中的四环素(TC).结果表明,在60min内,MoS₂/PVDF膜对TC的降解效率为77.9%,反应速率常数为0.0231min^-1,高于单独的MoS₂(0.0135min^-1)和PVDF(0.0085min^-1).通过牺牲剂实验结合LC-MS探究TC降解过程的中间产物并分析反应机理.在循环实验中,MoS₂/PVDF膜表现出优异的可重用性和可回收性.上述结果表明,在水流的机械漩涡力作用下,MoS₂/PVDF膜可以触发压电电位并产生丰富的自由电子来激活PMS,从而产生各种活性物质来降解有机污染物.

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	王玥璐
	海士坤
	韩佳骏
	张锦晓
	翟圆梦

关键词 ：过氧单硫酸盐, 压电效应, 四环素, 聚偏二氟乙烯

Abstract：In advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS), efficient activation and utilization of PMS was considered to be an important goal for the removal of organic pollutants. The piezoelectric effect driven by water flow was introduced into PMS activation in this study, using the prepared MoS₂/PVDF membrane as a piezoelectric membrane to remove tetracycline (TC) from water. The degradation efficiency of TC by MoS₂/PVDF membrane was 77.9% within 60min was showed in the results, with a reaction rate constant of 0.0231min^-1, which was higher than that of MoS₂ (0.0135min^-1) and PVDF (0.0085min^-1). Sacrificial agent experiments combined with LC-MS were used to explore the intermediates of the TC degradation process and analyze the reaction mechanism. In cycling experiments, the excellent reusability and recyclability was exhibited in MoS₂/PVDF membranes. These results indicated that under the mechanical vortex force of water flow, MoS₂/PVDF membrane can trigger piezoelectric potential and generate abundant free electrons to activate PMS, thereby producing various active substances to degrade organic pollutants.

Key words： peroxymonosulfate piezoelectric effect tetracycline polyvinylidene difluoride

收稿日期: 2024-07-01

PACS:

X703.5

基金资助:科技厅科技攻关项目(222102320188);河南省高等学校重点科研项目计划(21A430008)

通讯作者: 王玥璐,讲师,thnwyl@163.com E-mail: thnwyl@163.com

作者简介: 王玥璐(1982-),女,河南商丘人,讲师,硕士,主要从事化学化工.发表论文7篇.thnwyl@163.com.

引用本文:

王玥璐, 海士坤, 韩佳骏, 张锦晓, 翟圆梦. 水流驱动的MoS₂/PVDF多孔膜降解水中四环素机理[J]. 中国环境科学, 2025, 45(2): 795-802. WANG Yue-lu, HAI Shi-kun, HAN Jia-jun, ZHANG Jin-xiao, ZHAI Yuan-meng. Degradation mechanism of tetracycline in water by MoS₂/PVDF porous membrane driven by water flow. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(2): 795-802.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2025/V45/I2/795

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