光触媒による硫黄化合物の分解に及ぼす銀担持の効果(<特集>セラミック材料)

概要

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TiO_2 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 (H_2S) and methylmercaptan (CH_3SH), were very slow to react on TiO_2 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 TiO_2 on the porous ceramics body, and successively depositing nano-sized Ag particles on TiO_2 by means of photodeposition method. It was observed that Ag-deposition on TiO_2 improved the adsorption ability for H_2S gas and CH_3SH gas. Consequently, the Ag-deposited photocatalytic filter could remove H_2S gas and CH_3SH gas with an 8.0 times, and an 8.7 times effectiveness, respectively, in comparison with conventional TiO_2 photocatalytic filter.
社団法人日本材料学会の論文
2003-06-15