BiVO4-Ru/SrTiO3: Rh composite Z-scheme photocatalyst for solar water splitting
BiVO4-Ru/SrTiO3: Rh composite Z-scheme photocatalyst for solar water splitting
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DOI：
10.1039/c3sc52810c
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发表时间：
2014-01-01
期刊：
影响因子：
8.4
通讯作者：
Kudo, Akihiko
中科院分区：
文献类型：
--
作者：
Jia, Qingxin;Iwase, Akihide;Kudo, Akihiko
BiVO 4-SrTiO 3：采用浸渍法和液-固相反应法制备了Rh掺杂的SrTiO 3/BiVO 4复合光催化剂。该复合材料在可见光或模拟太阳光照射下表现出光催化活性的Z-示意水裂解没有电子介体。水裂解的最适pH为中性。水分解的复合材料进行通过粒子间的电子转移从BiVO 4 Ru/SrTiO 3：Rh颗粒在大的界面面积通过这些制备方法获得。复合材料的光催化分解水活性取决于BiVO 4的结晶度和形貌。采用液-固反应法制备的复合材料具有最高的光催化活性。这是由于形成了结晶良好的BiVO 4单晶状颗粒。BiVO 4-Ru/SrTiO 3：Rh复合光催化剂在420 nm处的量子产率为1.6%，活性稳定。因此，我们开发了最简单的系统，除了光催化剂粉末和水，不需要添加剂，用于光催化太阳能水分解。
BiVO4-SrTiO3: Rh composites in which the Rh-doped SrTiO3 particles of a H-2-evolving photocatalyst attached on the BiVO4 particles of an O-2-evolving photocatalyst were prepared by an impregnation method and a liquid-solid state reaction. The composites showed photocatalytic activity for Z-schematic water splitting under visible light or simulated sunlight irradiation without an electron mediator. The optimum pH for the water splitting was neutral. Water splitting over the composite proceeded via an interparticle electron transfer from BiVO4 to Ru/SrTiO3: Rh particles at the large interfacial area obtained by those preparation methods. The photocatalytic water splitting activity of the composite depended on the crystallinity and morphology of BiVO4. The composite prepared by the liquid-solid state reaction showed the highest photocatalytic activity. This was due to the formation of well-crystallized BiVO4 single-crystal-like particles. The BiVO4-Ru/SrTiO3: Rh composite photocatalyst gave a quantum yield of 1.6% at 420 nm and a stable activity. Thus, we have developed the simplest system requiring no additives, except for photocatalyst powder and water, for photocatalytic solar water splitting.