Al掺杂TiO2的制备及酸化处理对其光催化活性的影响

J4 ›› 2010, Vol. 45 ›› Issue (9): 113-116.

Al掺杂TiO₂的制备及酸化处理对其光催化活性的影响

张国强,刘燕,周爱秋,许效红*

山东大学化学与化工学院, 山东济南 250100

收稿日期:2009-11-17 出版日期:2010-09-16 发布日期:2010-10-12
通讯作者: 许效红(1964-),女,博士,教授,主要从事催化与光催化材料的研究.
作者简介:张国强(1982-),男,硕士研究生,主要从事光催化材料的制备及研究.Email: stdaqiang@163.com
基金资助:
国家自然科学基金资助项目(20776079);山东省自然科学基金资助项目(Y2006F25)

Preparation of Al-doping TiO₂ and effect of acid treatment on its photocatalytic activity

ZHANG Guo-qiang, LIU Yan, ZHOU Ai-qiu, XU Xiao-hong*

School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China

Received:2009-11-17 Online:2010-09-16 Published:2010-10-12

摘要/Abstract

摘要：

锐钛矿相TiO2的光催化活性高于金红石相。采用化学溶液分解法制备了Al掺杂锐钛矿TiO₂,并用硝酸对其进行酸化处理。利用TG-DTA、XRD、FTIR、BET和UV-vis等手段对样品进行了表征,通过对甲基橙的降解分析了酸化处理对Al掺杂TiO₂光催化活性的影响。结果表明:掺杂Al能有效抑制TiO2由锐钛矿向金红石转变。酸化处理因能增大Al掺杂TiO₂的比表面积而使其光催化活性提高。Al／Ti掺杂比为1∶4的样品在酸化处理后具有的光催化活性最高,60min后对甲基橙的降解达到100％。

关键词: 二氧化钛;铝掺杂;相变;酸化处理;光催化

Abstract:

Anatase phase has a far higher photocatalytic activity than the rutile phase. Al doped TiO₂ photocatalysts were prepared by a chemical solution decomposition method and treated with concentrated nitric acid. The samples were characterized by TG-DTA, XRD, FTIR, BET and UV-Vis, and the effects of acid treatment on the photocatalytic activities of the Al doped TiO₂ samples were analyzed by degradation of methyl orange. The results suggested that Al-doping could effectively inhibit the phase transformation from anatase to rutile. The specific surface area and photocatalytic activity of Al doped TiO2 were increased by acid treatment. The Al doped TiO₂ (Al∶ Ti=1∶ 4) by acid treatment delivered the highest photocatalytic activity, and the degradation ratio of methyl orange was 100％ after 60 min.

Key words: titania; Al doping; phase transformation; acid treatment; photocatalysis

张国强,刘燕,周爱秋,许效红*. Al掺杂TiO₂的制备及酸化处理对其光催化活性的影响[J]. J4, 2010, 45(9): 113-116.

ZHANG Guo-qiang, LIU Yan, ZHOU Ai-qiu, XU Xiao-hong*. Preparation of Al-doping TiO₂ and effect of acid treatment on its photocatalytic activity[J]. J4, 2010, 45(9): 113-116.

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Al掺杂TiO₂的制备及酸化处理对其光催化活性的影响

Preparation of Al-doping TiO₂ and effect of acid treatment on its photocatalytic activity

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