Utilization of Metal Sulfide Material of (CuGa)1-xZn2xS2 Solid Solution with Visible Light Response in Photocatalytic and Photoelectrochemical Solar Water Splitting Systems
Utilization of Metal Sulfide Material of (CuGa)1-xZn2xS2 Solid Solution with Visible Light Response in Photocatalytic and Photoelectrochemical Solar Water Splitting Systems
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DOI：
10.1021/acs.jpclett.5b00137
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发表时间：
2015-03-19
影响因子：
5.7
通讯作者：
Kudo, Akihiko
中科院分区：
文献类型：
--
作者：
Kato, Takaaki;Hakari, Yuichiro;Kudo, Akihiko
在CuGaS 2和ZnS之间形成固溶体后，我们成功地开发了一种高活性的（CuGa）（1-x）Zn 2xS 2光催化剂，在可见光照射下，在牺牲试剂的存在下，用于H-2的析出。Ru负载的（CuGa）（0.8）Zn0.4S2在Z-方案体系中作为H-2释放光催化剂，BiVO 4作为O-2释放光催化剂，Co络合物作为电子介体。Z-方案系统在可见光和模拟太阳光照射下将水分解为H-2和O-2。（CuGa）（1-x）Zn_（2-x）S_2具有p型半导体特性。的光电化学电池与Ru负载（CuGa）（0.5）ZnS 2光电阴极和CoOx改性的BiVO 4光电阳极分裂水，即使没有施加外部偏压。因此，我们成功地证明了金属硫化物材料组可用于Z方案和电化学系统，以实现太阳能水分解为H-2和O-2。
Upon forming a solid solution between CuGaS2 and ZnS, we have successfully developed a highly active (CuGa)(1-x)Zn2xS2 photocatalyst for H-2 evolution in the presence of sacrificial reagents under visible light irradiation. The Ru-loaded (CuGa)(0.8)Zn0.4S2 functioned as a H-2-evolving photocatalyst in a Z-scheme system with BiVO4 of an O-2-evolving photocatalyst and Co complexes of an electron mediator. The Z-scheme system split water into H-2 and O-2 under visible light and simulated sunlight irradiation. The (CuGa)(1-x)Zn2xS2 possessed a p-type semiconductor character. The photoelectrochemical cell with a Ru-loaded (CuGa)(0.5)ZnS2 photocathode and a CoOx-modified BiVO4 photoanode split water even without applying an external bias. Thus, we successfully demonstrated that the metal sulfide material group can be available for Z-scheme and electrochemical systems to achieve solar water splitting into H-2 and O-2.