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环境化学  2015 

TiO2,ZnO光催化降解庚烷的活性研究

Keywords: 二氧化钛,氧化锌,庚烷,光催化反应,超细粉

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Abstract:

采用XRD,SPS,XPS,BET技术对TiO2和ZnO超细粉进行了结构、性能测试。考察了不同粒径的超细粉和普通商品(体相)TiO2,ZnO对庚烷的气相光催化反应。结果表明,TiO2(锐钛矿型)光催化活性大于ZnO,锐钛矿型TiO2光催化活性较金红石型TiO2好。对于同一结构的粒子来说,粒径愈小,带隙能愈大,表面羟基含量愈高,光催化活性愈高。通过反应产物的分析,探讨了反应机理。

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