高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (4): 663.

• 研究简报 • 上一篇    下一篇

钙钛矿(ABO3)型复合氧化物的光催化活性变化趋势与分析

白树林, 傅希贤, 桑丽霞, 杨秋华, 王俊珍, 曾淑兰   

  1. 天津大学理学院化学系, 天津 300072
  • 收稿日期:2000-04-04 出版日期:2001-04-24 发布日期:2001-04-24
  • 通讯作者: 傅希贤(1943年出生),女,教授,主要从事光催化材料的研究.E-mail:chem@tju.edu.cn E-mail:chem@tju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:5977019)资助

Change Tendency of Photocatalytic Activity in System of Perovskite(ABO3) Type Oxide and Analysis

BAI Shu-Lin, FU Xi-Xian, SANG Li-Xia, YANG Qiu-Hua, WANG Jun-Zhen, ZENG Shu-Lan   

  1. Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
  • Received:2000-04-04 Online:2001-04-24 Published:2001-04-24

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关键词: 钙钛矿型复合氧化物, 光催化活性, Allred-Rochow电负性, 能隙

Abstract: The perovskite(ABO3) type oxides have a photocatalytic activity that can be characterized with decolorization of some organic dyes under irradiation of mercury lamp. The experimental results show that the photocatalytic activity of ABO3 increases with increasing atomic number of atom B(Ti—Co) when A-site atom keeps constant. It is connected with the rise of Allred Rochow electronegativity of atom B, the decrease of ABO3 energy gap(energy defference between the filled p bands of O2- and the unoccupied 3 d band of neighboring atom B) and the increase of the third atomic ionizaton potentials of atom B. It has been also proved that the photocatalytic activity of ABO3 compounds increases with increasing χARof atom A(Ca, Cd, Pb).

Key words: Perovskite type oxide, Photocatalytic activity, Allred-Rochow electronegativity, Energy gap

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