鈦酸四丁酯水解制備TiO_2光催化氧化五氯苯...

鈦酸四丁酯水解制備TiO_2光催化氧化五氯苯...

中國環境科學 2000,20(5)

2.蘭州鐵道學院環境工

程系,甘肅 蘭州 730071)

摘要

實用的TiO2半導體光催化劑,通過光催化氧化五氯苯酚鈉實驗,結合對催化劑晶型結構

溫度為650

pH值為6.5,TiO2投加量為2 g/L,光照強度為30W/m2時,五氯苯酚鈉2 h光催化氧化率達95.5%.

關鍵詞中圖分類號

燒結溫度

光催化氧化

A 文章編號

２．Ｄｅｐａｒｔｍｅｎｔ?。铮妗。牛睿觯椋颍铮睿恚澹睿簟。幔睿洹。牛睿纾椋睿澹澹颍椋睿?，?。蹋幔睿瑁铮酢。遥幔椋欤鳎幔?/p>

Ｉｎｓｔｉｔｕｔｅ，Ｌａｎｚｈｏｕ?。罚常埃埃罚?，?。茫瑁椋睿幔?China Environmental Science. 2000,20(5)

TiO2 powder were prepared by tetrabutyl titanate hydrolysis and two main influential factors, R(mol ratio of

water to tetrabutyl titauate) and caleinating temperarure were studied. The TiO2 photocatalysts prepared were comprehen-sively assessed through the photocatalytic cxperiment of sodium pentachlorophenolate(PCP-Na) and the indicated analysisof the crystal structure and the specific surface of the catalysts. The results indicate that the catalysts have better photo-catalytic activity and use life at conditions of R=100 and calcinateing temperature 650

tetrabutyl titanatesodium pentachlorophenolate (PCP-Na)

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,對TiO2的研究日趨廣

泛.利用鈦的化合物水解是制備半導體催化劑TiO2粉末的有效方法.其關鍵問題在于水解過程中如何促進晶核的生成,抑制晶核的長大與顆粒的凝聚,并形成一定晶型結構.這些與水解時R值及燒結溫度等關系極其密切.

本文將通過光催化降解五氯苯酚鈉實驗考察R值

收稿日期

國家科技攻關項目(96-909-05-02)

* 現為清華大學環境工程系在讀博士生

特征波長為365nm;pHS-3B精密pH計;DO

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