水の完全分解反応に対するGa_2O_3光触媒の高活性化(<特集>太陽光利用技術:光触媒)

概要

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Photocatalytic overall splitting of H_2O is one of the important photocatalytic reactions and has been studying widely to convert photoenergy into chemical energy directly under solar irradiation. However, the performances of the photocatalysts for the reaction, not only the photocatalytic activity but also the photoresponse, are insufficient for further applications. In this review, we summarize the factors for improving the photocatalytic activity referred to the previous studies under developing the effective photocatalysts for the H_2O splitting and show the improvement of the photocatalytic activity of Ga_2O_3 photocatalysts toward the overall splitting of H_2O. Particularly, as for the improvements of the photocatalytic activity of Ga_2O_3, we introduce the improvement of the photocatalytic activity by controlling the surface state of Ga_2O_3, such as combining the effective co-catalysts, as well as the morphology and the bulk states by changing the preparation condition and doping Zn ion, respectively.
2012-03-20