P6 超音波光触媒反応における過酸化水素の役割
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概要
- 論文の詳細を見る
In order to examine the synergistic effects of combining sonolysis and photocatalysis, sonophotocatalysis of oxalic acid was performed using various kinds of TiO_2s such as anatase and rutile type. Synergistic effect was observed in all cases. The indexes of corroboration, however, were different. In this synergistic effect, hydrogen peroxide produced from solvent (H_2O) by sonolysis was thought to be played an important role. It is known that a photocatalytic reaction accelerates by addition of H_2O_2. Active oxygen species were produced in the process of decomposition of H_2O_2 by photocatalysis and they attacked to reactants. In the case of sonophotocatalysis, H_2O_2 also participated in the process of decomposition of oxalic acid. (Sonolysis of solvent) 2H_2O → H_2+H_2O_2 (Photocatalysis) 2H_2O_2 → 2H_2O+O_2 In order to confirm of role of H_2O_2, photocatalysis of H_2O_2 was performed. In the case of anatase type TiO_2, H_2O_2 was adsorbed on the surface of photocatalyst. In the case of rutile, on the other hand, O_2 was obtained stoichiometorically from H_2O_2.
- 日本ソノケミストリー学会の論文
- 2005-10-14