ルチル型チタニア微粒子の光触媒活性におよぼすシリカ被覆処理の影響〔英文〕

概要

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In order to reduce the photocatalytic activity of rutile titania particles (TOP (R)), two methods of silica-coating onto them were attempted. The amount of Ag photodeposited onto the particles per unit area, which was defined as the value of z, was calculated as an indication of their photocatalytic activities. <BR>It was found that, when compared in the similar amount of silica-coatings, the z value of TOP (R) with silica-coatings prepared by a liquid phase deposition (LPD) method was approximately 0.1 times that by the general coating method. Transmission electron micrographs and the binding energy of Si<SUB>2p</SUB> electron of the coatings determined by X-ray photoelectron spectroscopy (XPS) suggest that the superior effect of the former on the suppression of the photocatalytic activity is ascribable to the characteristics of the coatings by the LPD method, which are uniformity and a dense structure.
色材協会の論文