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环境化学  2015 

DOI:10.7524/j.issn.0254-6108.2014.04.022

Keywords: 磺胺甲噁唑,磷钨酸/二氧化钛,光催化

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Abstract:

以典型抗生素类药物磺胺甲噁唑(SMZ)为目标物,模拟太阳光下研究其在磷钨酸/二氧化钛(H3PW12O40/TiO2)复合膜上的光催化降解行为,并对其可能的降解机理进行探讨.通过一系列的条件实验确定H3PW12O40/TiO2复合膜光催化降解SMZ的最佳实验条件为H3PW12O40掺杂量为7.7%、污染物初始浓度为50mg·L-1、溶液pH值为5.5.此时,H3PW12O40/TiO2复合膜表现出最强的光催化活性,其动力学常数为0.453h-1,为纯TiO2膜的3.0倍;模拟太阳光照射12h后,复合膜对SMZ的矿化度可达66.6%,是纯TiO2膜的1.25倍.

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