高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (S1): 478.

• Physical Organic Chemistry • 上一篇    下一篇

纳米TiO2异相光催化降解2,6-二甲酚中间过程的UV吸收光谱和荧光光谱示踪研究

马万红, 蔡汝秀   

  1. 武汉大学化学学院, 武汉 430072
  • 出版日期:1998-12-31 发布日期:1998-12-31

Study on the Heterogeneous Photodegradation of 2,6-dimethylphenol on the Nanometer-size TiO2 with UV-spectra and Fluorescent Spectra

MA Wan-Hoa, CAI Ru-Xiu   

  1. College of chemistry, Wuhan university, Wuhan 430072
  • Online:1998-12-31 Published:1998-12-31

PDF (PC)

摘要： 用半导体纳米材料(如TiO2,SnO2,CdS等)进行光降解消除污染物因其能最大限度利用太阳能和降解完全(有机质最终全部转化为CO2,H2O等)以及降解速率高的特点被认为是环境科学的新领域。异相光催化降解是有机物作为电子供体捕获TiO2表面光生空穴自身被氧化降解的过程,因TiO2价带空穴所具有强的氧化性,一般有机物都可进行光化学反应[1]。这一过程总是以一系列的中间反应步骤所构成,中间体形成的峰形动力学曲线及其异于原初态的光谱特性对揭示光催化降解动力学过程至为重要。本文主要对2,6-二甲酚-纳米TiO2悬浮体系光降解动态分子光谱进行示踪研究。

关键词: Photodegradiation, Nanometer size TiO2, 2, 6-dimethylphenol

Abstract: In this paper, a verious of intermediates were found in photodegradiation of 2,6-dimethylphenol catalyzed on nanometer size TiO2 surface by UV absorption spectra and fluorescent spectra.The characteristics of intermediates formed and degradiated contributed to traping had step by step in successive reaction, and possible mechanism was discussed.

Key words: Photodegradiation, Nanometer size TiO2, 2,6-dimethylphenol

TrendMD: