Enhancement of Photocatalytic Water Oxidation Activity on IrOx−ZnO/Zn2−xGeO4−x−3yN2y Catalyst wit

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• 作者：Baojun Ma ; Jinhui Yang ; Hongxian Han ; Jiantao Wang ; Xiaohong Zhang ; Can Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：July 29, 2010
• 年：2010
• 卷：114
• 期：29
• 页码：12818-12822
• 全文大小：300K
• 年卷期：v.114,no.29(July 29, 2010)
• ISSN：1932-7455

文摘

A three-component photocatalyst IrO_x−ZnO/Zn_2−xGeO_4−x−3yN_2y was designed and investigated for photocatalytic O₂ production under visible light irradiation. It was found that loading of IrO_x or ZnO alone could efficiently improve the photocatalytic activity. The even higher photocatalytic activity was achieved by coloading of IrO_x and ZnO on Zn_2−xGeO_4−x−3yN_2y, which was about 5.6 times that of Zn_2−xGeO_4−x−3yN_2y alone. The photocatalysts simultaneously coloaded with IrO_x and ZnO on Zn_2−xGeO_4−x−3yN_2y showed higher photocatalytic activities than those coloaded with IrO_x and ZnO sequentially. The high resolution transmission electron microscopy (HRTEM) characterization showed that a solid solution phase junction (SSPJ) was possibly formed at the interface of ZnO and Zn_2−xGeO_4−x−3yN_2y nanaoparticles. This phase junction formed between ZnO and Zn_2−xGeO_4−x−3yN_2y may promote the charge separation and consequently result in the enhanced photocatalytic activity.