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Citation: Han Shi-Tong, Xi Hai-Ling, Fu Xian-Zhi, Wang Xu-Xu, Ding Zheng-Xin, Lin Zhi-Cong, Su Wen-Yue. Study on the Photocatalytic Degradation of a Simulate Agent (2-CEES) of Mustard Gas[J]. Acta Physico-Chimica Sinica, ;2004, 20(03): 296-301. doi: 10.3866/PKU.WHXB20040316 shu

Study on the Photocatalytic Degradation of a Simulate Agent (2-CEES) of Mustard Gas

1.
Research Institute of Photocatalysis, Fuzhou University, Fuzhou　350002;The Academy of Chemical Defence, The People’s Liberation Army, Beijing　102205

Received Date: 22 August 2003
Available Online: 15 March 2004

The Photocatalytic degradation reaction of 2-chloroethyl ethyl sulfide (2-CEES) on P25 TiO2 was studied by using flow micro-reaction technique, GC-MS, and in situ FTIR. It was showed that 2-CEES could be oxidized finally into CO2 and H2O at room temperature during the process. Detailed analysis found that C2H4, CH3CHO, CH4, CO, HCl and H2S; a small quantity of low molecular weight carboxylic acids, ethers and sulphones; a trace amount of C2H5SC2H5, C2H5S2C2H5, C2H5SC2H4Cl and CH2ClCH2Cl exist in the gaseous product of reaction besides CO2 and H2O, and some species such as C2H5S2C2H5, C2H5SC2H4OH, C4H9S2C2H5, C2H5S2C2H4OH and SO42- remain on the surface of the catalyst after reaction. According to the above results, a photocatalytic degradation mechanism of 2-CEES was suggested, deducing that 2-CEES was photocatalytically degraded into CO2 and H2O via a complicated process including dechlorination, C－S bond splitting, photo-polymerization and decompose of organo-sulfur intermediates. The accumulation of sulfur-contained species on the surface was thought to result in deactivation of the catalyst.
- 2-chloroethyl ehtyl sulfide(2-CEES);Photocatalytic degradation;　Reaction mechanism;Disinfection
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