高等学校化学学报

高等学校化学学报

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ABO3型钙钛矿结构的可见光光催化剂LaCo0.5Ti0.5O3的设计与合成

杨立滨1,2, 井立强1, 李姝丹1, 蒋保江1, 付薇1, 付宏刚1   

    1. 黑龙江大学化学化工与材料学院物理化学实验室, 哈尔滨 150080;
    2. 佳木斯大学化学与药学院, 佳木斯 154007
  • 收稿日期:2006-09-28 修回日期:1900-01-01 出版日期:2007-03-10 发布日期:2007-03-10
  • 通讯作者: 井立强

Design and Synthesis of a Visible Light Driven Photocatalyst LaCo0.5Ti0.5O3 with ABO3-type Perovskite Structure

YANG Li-Bin1,2, JING Li-Qiang1, LI Shu-Dan1, JIANG Bao-Jiang1, FU Wei1, FU Hong-Gang1   

    1. Laboratory of Physical Chemistry, School of Chemistry and Material Sciences,Heilongjiang University, Harbin 150080, China;
    2. College of Chemistry and Pharmacology, Jiamusi University, Jiamusi 154007, China
  • Received:2006-09-28 Revised:1900-01-01 Online:2007-03-10 Published:2007-03-10
  • Contact: JING Li-Qiang

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摘要： 采用溶胶-凝胶法在较低温度条件下设计合成了新型的具有ABO3型钙钛矿结构的三元金属复合氧化物LaCo0.5Ti0.5O3. 通过TG-DTA, XRD, XPS, UV-Vis DRS等测试技术和可见光光催化活性测试对其进行了表征. 结果表明, 与LaCoO3和La2Ti2O7相比, LaCo0.5Ti0.5O3样品表现出相对较高的可见光光催化活性, 并且合成温度较低. 这是由于原料中的Co2+和Ti4+离子通过电荷补偿作用使产物B位的两种金属均以+3价氧化态分布所致.

关键词: 钙钛矿, LaCo0.5Ti0.5O3, 溶胶-凝胶法, 可见光光催化

Abstract: A novel ternary metal complex oxide, LaCo0.5Ti0.5O3, with ABO3-type perovskite structure was designed and synthesized by a sol-gel method at relatively low temperature, and were characterized by means of several testing techniques such as TG-DTA, XRD, XPS and UV-Vis DRS spectra. The results show that, compared with LaCoO3 and La2Ti2O7, the as-prepared sample exhibits a higher photocatalytic activity under visible light irradiation, and can be obtained at lower temperature. It can be proposed that the charge compensation effects make Co2+ and Ti4+ ions in raw material co-occupy uniformly B site in perovskite both as the forms of +3 valence, which is responsible for the lower temperature synthesis.

Key words: Perovskite, LaCo0.5Ti0.5O3, Sol-gel method, Visible light photocatalysis

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