抄録
Photocatalytic cleavage of water is very attractive from the viewpoint of solar energy conversion. Although there were a few success, it was difficult to decompose water stoichiometricaly and continuously. On the other hand, sonochemical reaction of water results in the production of hydrogen and hydrogen peroxide. Photocatalytic decomposition of H_2O_2 proceeds easily. So I attempt sonophotocatalytic cleavage of water which means a simultaneous irradiation of light and ultrasound to the reactant. When the irradiation was carried out only by light source, the reaction of water cleavage could not proceed. On the other hand, in the case of only sonication, a lot of H_2 and a little amount of O_2 were obtained. By the simultaneous irradiation, H_2 and O_2 were evolved in the ratio of nearly 2:1 after an induction period.
