高等学校化学学报

高等学校化学学报

• 研究快报 • 上一篇    下一篇

熔盐中熟化处理提高BiFeO3的可见光催化活性

孙尚梅1,2, 庞广生1, 李春光1, 黄玉亮1, 冯守华1   

    1. 吉林大学无机合成与制备化学国家重点实验室, 长春 130012;
    2. 延边大学理学院化学系, 延吉 133002
  • 收稿日期:2007-06-29 修回日期:1900-01-01 出版日期:2007-10-10 发布日期:2007-10-10
  • 通讯作者: 庞广生

Enhancing the Visible-light Photocatalytic Activity of BiFeO3 by Heating in Molten Salt

SUN Shang-Mei1,2, PANG Guang-Sheng1*, LI Chun-Guang1, HUANG Yu-Liang1, FENG Shou-Hua1   

    1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China;
    2. Department of Chemistry, College of Science, Yanbian University, Yanji 133002, China
  • Received:2007-06-29 Revised:1900-01-01 Online:2007-10-10 Published:2007-10-10
  • Contact: PANG Guang-Sheng

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摘要： 研究发现, 通过熔盐中熟化处理可以显著地提高BiFeO3的可见光催化活性.

关键词: 钙钛矿, 融盐法, 光催化

Abstract: The visible-light photocatalytic activity of BiFeO3 can be enhanced by treating in LiNO3 molten salt. BiFeO3 is prepared by pyrolysis of tartaric acid complex. The as-prepared BiFeO3 is mixed with LiNO3 salt by ball milling for 4 h with the molar ratio 12∶1 of LiNO3 to BiFeO3. The mixture was heated at 270 ℃ for 12 h, and LiNO3 was removed from the product by washing with distilled water. The visible light photocatalytic activity is evaluated by measuring the decoloratation of Congo red aqueous solution. After heating in LiNO3 molten salt, the decoloratation of Congo red aqueous solutions increased significantly from 31.6% to 95.4%. The enhancement of the photocatalytic activity is attributed to surface modification of BiFeO3 by treating in LiNO3 molten Salt.

Key words: Perovskite, Molten salt method, Photocatalytic activity

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