静电直写PVDF/MoS_(3)膜的制备及光催化性能  

Preparation and Photocatalytic Properties of Electrostatically Direct-written PVDF/MoS_(3)Membranes

作　　者：郝绍菊 马竞[2] 翟圆梦 谢佳瑶 HAO Shaoju;MA Jing;ZHAI Yuanmeng;XIE Jiayao(Architectural Engineering Institute,Henan Open University,Zhengzhou 450000,China;School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450000,China;School of Materials Engineering,Henan University of Engineering,Zhengzhou 450000,China)

机构地区：[1]河南开放大学建筑工程学院,河南郑州450000 [2]郑州大学力学与安全工程学院,河南郑州450000 [3]河南工程学院材料工程学院,河南郑州450000

出　　处：《环境科学与技术》2025年第4期12-21,共10页Environmental Science & Technology

摘　　要：基于过氧单硫酸盐(PMS)活化的高级氧化工艺已成为一种很有前景的有机污染物去除技术。该研究以聚偏二氟乙烯(PVDF)膜为骨架,包裹具有手风琴状结构的三硫化钼(MoS_(3)),采用静电直写技术制备了网格均匀、高比表面积和高暴露活性位点的PVDF/MoS_(3)复合膜。在最佳条件下,PVDF/MoS_(3)膜在70 min内实现了98.7%的四环素(TC)去除率。密度泛函理论计算进一步证实,PMS和TC在PVDF/MoS_(3)膜上较低的吸附能垒有利于TC的富集和PMS的活化。机理研究表明,自由基(·OH、SO_(4)^(•-)、·O_(2)^(-))和非自由基(^(1)O_(2))都参与了降解过程。PVDF/MoS_(3)/PMS/光系统显示出优异的抗污性和循环稳定性,突出了复合膜去除持久性有机污染物的潜力。Advanced oxidation processes based on peroxymonosulfate(PMS)activation have become a promising technology for the removal of organic pollutants.In this study,the polyvinylidene difluoride(PVDF)membrane was used as a backbone to encapsulate molybdenum trisulfide(MoS_(3))with an accordion-like structure.The PVDF/MoS_(3)composite films with uniform grid,high specific surface area and highly exposed active sites were prepared using electrostatic direct writing technology.Under the optimal conditions,the PVDF/MoS_(3)membrane achieved 98.7%hydrochloride(TC)removal efficiency within 70 min.Density functional theory calculations further confirmed that the lower adsorption energy barriers of PMS and TC on PVDF/MoS_(3)facilitated TC enrichment and PMS activation.Mechanistic studies demonstrated the involvement of both radical(·OH,SO_(4)^(•-),·O_(2)^(-))and nonradical(^(1)O_(2))pathways in the degradation process.The PVDF/MoS_(3)/PMS/light system displayed excellent fouling resistance and cyclic stability,highlighting the potential of composite membranes in removing persistent organic pollutants.

关 键 词：过氧单硫酸盐 静电直写技术 聚偏二氟乙烯 三硫化钼 四环素 

分 类 号：X703.1[环境科学与工程—环境工程]