焙烧的P-25TiO_2微结构特性和光催化活性

查看全文 作　　者：[1]李玉光;[2]PorterJohnF;[3]ChanChakK

机构地区：[1]中山大学化学与化工学院,广州510275;[2]DepartmentofChemicalEngineering,HongKong;[3]UniversityofScienceandTechnology,HongKong

出　　处：《物理化学学报》索引1999年第15卷第1期,共5页

摘　　要：The microstructural characteristics of P-25 TiO2 photocatalysts calcined at 600, 650,700, 750, 800, 900 and 1000℃ have been studied using XRD, TEM and BET. The photocatalytic activity of the samples were also examined using the degradation of phenol as a model reaction.The results indicate that the calcination significantly affects both microstructural characteristics and photoactivity, and there is an apparent relationship between photocatalytic activity and centain mocrostructural characteristics.Over the range of calcination temperatures and durations studied, the sample calcined at 650℃ for 3 h revealed the highest photoreactivity, which can be ascribed to an improvement in crystallinity on calcination.The increase in the rutile content and grain size caused by the calcination at higher temperatures were observed to decrease the photocatalytic activities of the TiO2 samples. 关键词：氧化污水处理二氧化钛光催化剂

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焙烧的P-25TiO_2微结构特性和光催化活性

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