Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (10): 1531-1536.doi: 10.1016/S1872-1508(07)60078-3

• ARTICLE • Previous Articles     Next Articles

Benz[a]anthracene Heterogeneous Photochemical Reaction on the Surface of TiO2 Particles

SHEN Jian-Dong; ZHANG Shi-Cheng; LIAN Jin-Jun; KONG Ling-Dong; CHEN Jian-Min   

  1. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, P. R. China
  • Received:2007-05-31 Revised:2007-06-22 Published:2007-10-01
  • Contact: ZHANG Shi-Cheng; CHEN Jian-Min E-mail:zhangsc@fudan.edu.cn, jmchen@fudan.edu.cn

Abstract: The photochemical reaction of benz[a]anthracene (B[a]A) on TiO2 particles was investigated by using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and gas chromatography-mass spectrometry (GC-MS). It was confirmed that photocatalytic oxidation of benz[a]anthracene occured on the surface of TiO2 particles, and the surface hydroxyl and oxygen participated in the reactions. The main photochemical product of benz [a] anthracene was benz [a] anthracene-7,12-dione. Possible photochemical mechanism of benz[a]anthracene was also proposed. Under the simulated sun light irradiation (22 mW·cm-2), the process of benz[a]anthracene photodegration on TiO2 particles matches the exponential decay equation, and the half-life time is 6.8 min.

Key words: Benz[a]anthracene, TiO2, Photochemical reaction, DRIFTS

MSC2000: 

  • O644