2010 Fiscal Year Final Research Report

Photocatalytic Degradation of Gaseous Chlorinated Ethanes on TiO_2 and sulfated TiO_2 -Effect of Surface Acidity and Conversion to Useful Alkenes-

Research Project

Project/Area Number	20550179
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Inorganic industrial materials
Research Institution	Yamaguchi University
Principal Investigator	YAMAZAKI Suzuko Yamaguchi University, 大学院・理工学研究科, 教授 (80202240)
Project Period (FY)	2008 – 2010
Keywords	光触媒 / 反応機構 / ブレンステッド酸点 / ルイス酸点 / 有機塩素化合物 / 物質変換
Research Abstract	Volatile chlorinated organic compounds (VCOCs) have been serious environmental problems because they are toxic and carcinogenic to animals. Titanium dioxide photocatalysts have been good candidates as the remediation technique for the degradation of VCOCs. However, the photocatalytic activity decreases during the photocatalytic degradation of gaseous chlorinated ethanes. This study has clarified the degradation mechanism of the chlorinated ethanes and the reason for the deactivation of the photocatalysis. Furthermore, we found that in the absence of oxygen in the reactant gas stream, the photocatalytic degradation of chlorinated ethanes formed ethylene and ethylene chloride which are useful alkenes for chemical industries. Conversion to these alkenes from the chlorinated ethanes was studied under various experimental conditions.