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环境化学  2015 

水热法制备PbMoO4微晶体及其光催化降解灭幼脲

Keywords: 光催化降解,PbMoO4,灭幼脲,动力学,反应机理

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Abstract:

以水热法合成的PbMoO4微晶体为催化剂,考察了反应溶液pH、污染物初始浓度和催化剂用量对光催化降解灭幼脲的影响,研究了光催化降解过程的反应动力学和作用机理.结果表明,最佳反应溶液pH6.0、污染物初始浓度20mg·L-1、催化剂用量0.4g·L-1.反应4h灭幼脲降解率达99.96%,矿化率达66.4%,降解反应符合一级动力学.通过加入自由基清除剂对比实验发现,PbMoO4微晶体主要通过空穴和·OH的氧化作用使灭幼脲降解,其中空穴起主要作用.

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