Visible-light photocatalytic activity of TiO2?x by heat treatment and plasma-heat treatment |
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| Authors: | YoonKeun Chae JinWon Park Shinsuke Mori Masaaki Suzuki |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, University of Yonsei, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea;2. Department of Chemical Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan |
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| Abstract: | The partial reduction of TiO2 was attempted by heat treatment and plasma-heat treatment and it was carried out to investigate the photocatalytic characteristics of partially reduced TiO2 (TiO2?x) in the visible-light region. As a result, the plasma-heat treatment shows significantly stronger than the heat treatment for the visible-light photocatalytic activity of TiO2. The red-shifted absorption bands in the visible-light region of TiO2?x by plasma-heat treatment gave broader than one by heat treatment. The TiO2?x by heat treatment and plasma-heat treatment was changed white to beige color, and white to navy, respectively. |
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