Photooxidation of carbonyl sulfide in the presence of the typical oxides in atmospheric aerosol

作     者：WU Hongbo WANG Xiao CHEN Jianmin 

作者机构：Department of Environmental Science and Engineering Fudan University Shanghai 200433 China Department of Environmental Science and Engineering Fudan University Shanghai 200433 China Department of Environmental Science and Engineering Fudan University Shanghai 200433 China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2005年第48卷第1期

页      面：31-37页

核心收录：

学科分类：07[理学] 08[工学] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Grant No.20377008) 

主　　题：carbonyl sulfide, photooxidation, atmospheric aerosol, oxides, in situ FTIR. 

摘      要：Photooxidation of carbonyl sulfide (COS) under UV irradiation and the role of the oxides such as SiO2, Al2O3 and Fe2O3 were investigated by in situ FTIR in a long optical path cell. The major products were identified as SO2 and CO2 by means of IR spectra and GC-MS. SO2 was partially oxidized into SO4 on the surface of the oxides 2? and interior wall of the reactor, which was determined by XPS. The photooxidation is pseudo first order with respect to COS, and the apparent rate constant is approximately 9.30×10?4·s?1. SiO2 and Al2O3 promote the photooxida- tion of COS significantly, but Fe2O3 has no obvious influence on the reaction. The reaction rates in the presence of the oxides or not, rank as: UV + SiO2 UV + Al2O3 UV, UV + Fe2O3. The potentiality of the oxides for promoting the photooxidation of COS implicates that the aerosol particles may contribute to the photooxidation of COS in the at- mosphere.