The Estimation of the Surface Properties of Metal Oxides by the Use of TCNQ Adsorption. II. The Electron-donor Property of Silica-Alumina, Silica-Titania, and Alumina-Titania System Surfaces
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概要
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The electron-donor property of silica-alumina, silica-titania, and alumina-titania system surfaces was investigated by means of TCNQ adsorption. When TCNQ was adsorbed on the surfaces of the metal oxide systems from its acetonitrile solution, the surfaces of the metal oxides acquired the coloration characteristic of each oxide. The coloration was caused by the formation of TCNQ anion radicals on the metal oxide surfaces. The presence of the TCNQ anion radicals was confirmed by studying the ESR absorption and the electronic spectrum. The silica-alumina, silica-titania, and alumina-titania systems showed lower radical-ion-forming activity (electrondonating power) than the parent oxides-silica, alumina, and titania. The change in the activity with the composition was characteristic of each metal oxide system.
- 公益社団法人 日本化学会の論文
著者
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Hosaka Hiroshi
Department Of Environmental Studies Graduate School Of Frontier Sciences The University Of Tokyo
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Meguro Kenjiro
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo
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Kawashima Norimichi
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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