TiO2·Al2O3/beads光活性的研究

doi:10.7517/j.issn.1674-0475.2001.02.88

影像科学与光化学 ›› 2001, Vol. 19 ›› Issue (2): 88-95.DOI: 10.7517/j.issn.1674-0475.2001.02.88

TiO₂·Al₂O₃/beads光活性的研究

张新荣¹, 杨平², 赵梦月²

1. 哈尔滨工业大学应用化学系, 哈尔滨150001;
2. 郑州工业大学化工学院, 郑州450002

收稿日期:2000-07-12 修回日期:2000-11-02 出版日期:2001-05-20 发布日期:2001-05-20
通讯作者: 张新荣(1971-), 女, 哈尔滨工业大学在读博士研究生, 主要从事光电化学及其应用的研究.
基金资助:
国家科委重点科技攻关项目(920-05-02)

A STUDY ON THE PHOTOACTIVITY OF TiO₂·Al₂O₃/beads

ZHANG Xin-rong¹, YANG Ping², ZHAO Meng-yue²

1. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, P.R. China;
2. College of Chemical Engineering, Zhengzhou University of Technology, Zhengzhou 450002, P.R. China

Received:2000-07-12 Revised:2000-11-02 Online:2001-05-20 Published:2001-05-20

摘要/Abstract

摘要： 研究以空心玻璃微球为载体,用溶胶凝胶法制备附载型复合光催化剂的过程.对TiO₂·Al₂O₃/beads光催化活性进行评价,并利用XRD、TEM、SEM对附载型复合光催化剂进行表征,同时对TiO₂·Al₂O₃/beads的吸附性和比表面进行测试.结果表明,附载型复合光催化剂TiO₂·Al₂O₃/beads光活性显著提高且组分摩尔比存在最佳值.当n(TiO₂)/m (Al₂O₃) =97/3时,其最高光解率为同样降解条件下,同样含量Degussa P-25TiO₂ 光解率的 15倍左右.探讨了TiO₂·Al₂O₃/beads光活性提高的主要因素,认为纳米尺寸TiO₂ 和TiO₂·Al₂O₃/beads吸附性是光活性提高的最主要因素,另外,活化条件和比表面也是影响光活性的主要因素.

关键词: TiO₂·Al₂O₃, 复合光催化剂, 玻璃微球, 光活性

Abstract: The composite photocatalysts of TiO₂·Al₂O₃ attached to the hollow glass microbeads were prepared by a Sol gel technique. The photocatalyst was characterized by XRD, TEM, SEM and nitrogen adsorption, and the catalyst’s photoactivity was evaluated by the photodegradation of a organophosphorous pesticide DDW. The results show that the photocatalytic activity is affected by the mole ratio of the composite photocatalysts. The best photocatalyst among those studied 13 the one which has a mole ratio of 97/3(TiO₂:Al₂O₃), and its photoactivity is 1.5 times as that of Degussa P25 TiO₂. The results suggest that the nano particles TiO₂ and the adsorption of TiO₂·Al₂O₃/beads are the primary factors that improve photoactivity, while the calcination conditions and surface area are the second factors.

Key words: TiO₂·Al₂O₃, composite photocatalyst, microbeads, photoactivity

中图分类号:

张新荣, 杨平, 赵梦月. TiO₂·Al₂O₃/beads光活性的研究[J]. 影像科学与光化学, 2001, 19(2): 88-95.

ZHANG Xin-rong, YANG Ping, ZHAO Meng-yue. A STUDY ON THE PHOTOACTIVITY OF TiO₂·Al₂O₃/beads[J]. Imaging Science and Photochemistry, 2001, 19(2): 88-95.

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TiO₂·Al₂O₃/beads光活性的研究

A STUDY ON THE PHOTOACTIVITY OF TiO₂·Al₂O₃/beads

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