物理化学学报 >> 2007, Vol. 23 >> Issue (12): 1917-1921.doi: 10.3866/PKU.WHXB20071216

研究论文 上一篇    下一篇

氧缺位型TiO2的制备、表征及其光催化析氧活性

陈启元; 童海霞; 尹周澜; 胡慧萍; 李洁; 刘亮亮   

  1. 中南大学化学化工学院, 长沙 410083
  • 收稿日期:2007-06-14 修回日期:2007-08-27 发布日期:2007-11-30
  • 通讯作者: 陈启元 E-mail:cqy@mail.csu.edu.cn

Preparation, Characterization and Photo-catalytic Behavior of TiO2 Catalysts with Oxygen Vacancies

CHEN Qi-Yuan; TONG Hai-Xia; YIN Zhou-Lan; HU Hui-Ping; LI Jie; LIU Liang-Liang   

  1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
  • Received:2007-06-14 Revised:2007-08-27 Published:2007-11-30
  • Contact: CHEN Qi-Yuan E-mail:cqy@mail.csu.edu.cn

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摘要： 采用69 ℃饱和水蒸气和H2混合气, 于927 ℃下处理金红石型TiO2, 得到不同氧缺位的光催化剂, 并用X射线衍射(XRD)、比表面(BET)、电子顺磁共振(EPR)、紫外-可见漫反射(DRS)、光电子能谱(XPS)对其进行了表征. 考察了热处理时间对氧缺位型TiO2光催化分解水析氧活性的影响. 结果表明, 适量的氧缺位能显著提高金红石型TiO2光催化分解水的析氧活性, 其最大析氧速率达222 μmol·L-1·h-1.

关键词: 二氧化钛, 热处理, 氧缺位, 光催化活性

Abstract: The rutile TiO2 catalysts with oxygen vacancies were obtained under 927 ℃calcination using a mixed gas of saturation water vapor and H2 at 69 ℃. The catalysts were identified using X-ray diffraction (XRD), specific surface (BET), electron paramagnetic resonance spectroscopy (EPR), UV-Vis diffuse refraction spectroscopy (DRS), and X-ray photoelectron spectrum (XPS) measurements. The effect of calcination time on photocatalytic activity of TiO2 with different oxygen vacancies for O2 evolution was studied. The result indicated that appropriate oxygen vacancies could obviously improve the photocatalytic activity of rutile TiO2. The maximumO2 evolution speed of rutile TiO2 with oxygen vacancies was 222 μmol·L-1·h-1.

Key words: TiO2, Calcination, Oxygen vacancies, Photocatalytic activity