Maeda Kazuhiko, Teramura Kentaro, Takata Tsuyoshi, Hara Michikazu, Saito Nobuo, Toda Kenji, Inoue Yasunobu, Kobayashi Hisayoshi, Domen Kazunari
Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Phys Chem B. 2005 Nov 3;109(43):20504-10. doi: 10.1021/jp053499y.
The physical and photocatalytic properties of a novel solid solution between GaN and ZnO, (Ga(1-x)Zn(x))(N(1-x)O(x)), are investigated. Nitridation of a mixture of Ga(2)O(3) and ZnO at 1123 K for 5-30 h under NH(3) flow results in the formation of a (Ga(1-x)Zn(x))(N(1-x)O(x)) solid solution with x = 0.05-0.22. With increasing nitridation time, the zinc and oxygen concentrations decrease due to reduction of ZnO and volatilization of zinc, and the crystallinity and band gap energy of the product increase. The highest activity for overall water splitting is obtained for (Ga(1-x)Zn(x))(N(1-x)O(x)) with x = 0.12 after nitridation for 15 h. The crystallinity of the catalyst is also found to increase with increasing the ratio of ZnO to Ga(2)O(3) in the starting material, resulting in an increase in activity.
研究了一种新型的氮化镓与氧化锌固溶体（Ga(1-x)Zn(x))(N(1-x)O(x))的物理和光催化性能。在1123 K下，于氨气气流中对Ga(2)O(3)和ZnO的混合物进行5 - 30小时的氮化处理，会形成x = 0.05 - 0.22的(Ga(1-x)Zn(x))(N(1-x)O(x))固溶体。随着氮化时间的增加，由于氧化锌的还原和锌的挥发，锌和氧的浓度降低，产物的结晶度和带隙能量增加。氮化15小时后，x = 0.12的(Ga(1-x)Zn(x))(N(1-x)O(x))在整体水分解方面表现出最高活性。还发现，随着起始原料中氧化锌与Ga(2)O(3)比例的增加，催化剂的结晶度提高，活性也随之增加。
