著者

平川 力 米良 信昭 佐野 泰三 根岸 信彰 竹内 浩士

出版者

公益社団法人 日本薬学会

雑誌

YAKUGAKU ZASSHI (ISSN:00316903)

巻号頁・発行日

vol.129, no.1, pp.71-92, 2009-01-01 (Released:2009-01-01)

参考文献数

52

被引用文献数

11 12

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Photocatalysis has been widely applied to solar-energy conversion and environmental purification. Photocatalyst, typically titanium dioxide (TiO2), produces active oxygen species under irradiation of ultraviolet light, and can decompose not only conventional pollutants but also different types of hazardous substances at mild conditions. We have recently started the study of photocatalytic decontamination of chemical warfare agents (CWAs) under collaboration with the National Research Institute of Police Science. This article reviews environmental applications of semiconductor photocatalysis, decontamination methods for CWAs, and previous photocatalytic studies applied to CWA degradation, together with some of our results obtained with CWAs and their simulant compounds. The data indicate that photocatalysis, which may not always give a striking power, certainly helps detoxification of such hazardous compounds. Unfortunately, there are not enough data obtained with real CWAs due to the difficulty in handling. We will add more scientific data using CWAs in the near future to develop useful decontamination systems that can reduce the damage caused by possible terrorism.

著者

加藤 真示 平野 裕司 岩田 美佐男 佐野 泰三 竹内 浩士

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.52, no.6, pp.560-565, 2003-06-15 (Released:2009-06-03)

参考文献数

22

被引用文献数

2 2

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TiO2 photocatalytic filters are utilized for various fields of environmental purification, such as decomposition of stench substances and harmful chemicals, etc. However, it turned out that the decomposition rate of sulfide chemicals, such as hydrogen sulfide (H2S) and methylmercaptan (CH3SH), were very slow to react on TiO2 under UV irradiation. In order to improve the decomposition ability of sulfide chemicals, this Ag-deposited Photocatalytic filter has been developed. The Ag-deposited photocatalytic filter was fabricated by coating TiO2 on the porous ceramics body, and successively depositing nano-sized Ag particles on TiO2 by means of photodeposition method. It was observed that Ag deposition on TiO2 improved the adsorption ability for H2S gas and CH3SH gas. Consequently, the Ag-deposited photocatalytic filter could remove H2S gas and CH3SH gas with an 8.0 times, and an 8.7 times effectiveness, respectively, in comparison with conventional TiO2 photocatalytic filter.