Photocatalytic properties of gallium oxides prepared by precipitation methods toward the overall splitting of H2O
Photocatalytic properties of gallium oxides prepared by precipitation methods toward the overall splitting of H2O
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DOI：
10.1016/j.jcat.2013.06.025
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发表时间：
2014-02
影响因子：
7.3
通讯作者：
Y. Sakata;Takaki Nakagawa;Y. Nagamatsu;Yuta Matsuda;Ryō Yasunaga;Emi Nakao;H. Imamura
中科院分区：
文献类型：
--
作者：
Y. Sakata;Takaki Nakagawa;Y. Nagamatsu;Yuta Matsuda;Ryō Yasunaga;Emi Nakao;H. Imamura
研究了沉淀法制备的氧化镓对水的光催化分解性能。根据镓氧化物制备温度的不同，将其光催化性能分为三类。各类镓氧化物的光催化行为反映了相应晶相镓氧化物的光催化行为。其中，第二类负载NiO的α-Ga 2 O3的光催化活性明显高于第一类负载NiO的GaO（OH）和第三类负载NiO的β-Ga 2 O3。通过对所制备的氧化镓的表征、助催化剂RhyCr 2 − yO 3与光催化活性的结合以及制备方法对光催化反应的影响等研究，探讨了氧化镓光催化剂的状态和形貌对光催化分解H2O的影响。
The photocatalytic properties of gallium oxides that were prepared by precipitation methods to the overall splitting of H2O were studied. The photocatalytic behavior of the NiO-loaded gallium oxides to this reaction could be separated into three categories on the basis of the preparation temperatures of the gallium oxides. The photocatalytic behavior of each category reflected the behavior of corresponding crystal phase of gallium oxides. Of these categories, NiO-loaded α-Ga2O3, which composed the second category, exhibited remarkably high photocatalytic activity compared with those of NiO-loaded GaO(OH) and NiO-loaded β-Ga2O3which composed the first and third categories, respectively. Through investigations, such as the characterization of the prepared gallium oxides, the effects of combining RhyCr2−yO3co-catalyst with the photocatalytic activity and the effects of the preparation methods on the photocatalytic reaction, the influences of the states and the morphologies of the gallium oxide photocatalysts to the photocatalytic overall splitting of H2O were discussed.