中华医学超声杂志

应用化学 ›› 1991, Vol. 0 ›› Issue (6): 28-32.

• 研究论文 • 上一篇    下一篇

苯酚和氯苯酚的Pt/TiO2催化光解

许宜铭, 朱志杰, 陈文星, 马桂林   

  1. 扬州师范学院化学系, 扬州 225002
  • 收稿日期:1990-05-22 修回日期:1990-11-05 出版日期:1991-12-10 发布日期:1991-12-10

PHOTOCATALYTIC DEGRADATION OF PHENOL AND CHLOROPHENOLS ON Pt/TiO2-COATED PHOTOREACTOR

Xu Yiming, Zhu Zhijie, Chen Wenxing, Ma Guilin   

  1. Department of Chemistry, Yangzhou Teachers' College.Jiangsu, Yangzhu 225002
  • Received:1990-05-22 Revised:1990-11-05 Published:1991-12-10 Online:1991-12-10

PDF

547

摘要： 在TiO2和Pt/TiO2催化作用下水溶液中苯酚、对氯苯酚、2,4-二氯苯酚和2,4,6-三氯苯酚均能发生光致降解(λ≥345nm)。在固定于反应器内壁的薄层Pt/TiO2催化作用下,这些化合物的光致降解均呈现一级反应动力学;表观反应速率常数Kob的相对大小为:苯酚<对氯苯酚<2,4-氯苯酚<2,4,6-三氯苯酚。少量H2O2(1.9×10-2mol·L-1)能提高这些化合物的光解速率。光照1.0～5.0h后这些化合物的降解率大于97%,COD去除率大于95%。

关键词: 铂修饰二氧化钛, 光致降解, 苯酚, 氯苯酚

Abstract: The photocatalytic activity of Pt/TiO2 was higher than that of TiO2 for the photdegra-dation of phenol, 4-chlorophenol, 2, 4-dichlorophenol and 2, 4, 6-trichlorophenol. Photodegra-dation of these four compounds in aqueous solution followed first-order when they wereirradiated in a Pt/TiO2-coated photoreactor. The apparent first-order rate constants increasedin the order of phenol, 4-chlorophenol. 2, 4-dichlorophenol and 2, 4, 6-trichlorophenol. Addition of H2O2 (in 1.9×10-2mol·L-1) promoted the photodegradation. The phenols studiedwere almost completely degradated after a certain period of irradiation (λ≥345nm, 1.0～5.0 h) with photodegradation value up to 97% and COD value up to 95%.

Key words: platinum-modified titanium dioxide, photodegradation, phenol, chlorophenol

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