采用由金属硫化物、负载 CoOx 的 BiVO4 和还原氧化石墨烯电子介体组成的 Z 型体系，在可见光照射下进行水分解和 CO2 还原。
Water Splitting and CO2 Reduction under Visible Light Irradiation Using Z-Scheme Systems Consisting of Metal Sulfides, CoOx-Loaded BiVO4, and a Reduced Graphene Oxide Electron Mediator.
机构信息
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
Photocatalysis international Research Center, Research Institute for Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan.
出版信息
J Am Chem Soc. 2016 Aug 17;138(32):10260-4. doi: 10.1021/jacs.6b05304. Epub 2016 Aug 3.
Metal sulfides are highly active photocatalysts for water reduction to form H2 under visible light irradiation, whereas they are unfavorable for water oxidation to form O2 because of severe self-photooxidation (i.e., photocorrosion). Construction of a Z-scheme system is a useful strategy to split water into H2 and O2 using such photocorrosive metal sulfides because the photogenerated holes in metal sulfides are efficiently transported away. Here, we demonstrate powdered Z-schematic water splitting under visible light and simulated sunlight irradiation by combining metal sulfides as an H2-evolving photocatalyst, reduced graphene oxide (RGO) as an electron mediator, and a visible-light-driven BiVO4 as an O2-evolving photocatalyst. This Z-schematic photocatalyst composite is also active in CO2 reduction using water as the sole electron donor under visible light.
金属硫化物是一种在可见光照射下将水还原为 H2 的高效光催化剂，但由于严重的自光氧化（即光腐蚀），它们不利于水氧化为 O2。构建 Z 型方案系统是利用这种光腐蚀性金属硫化物将水分解为 H2 和 O2 的有效策略，因为金属硫化物中的光生空穴可以有效地被转移走。在这里，我们通过将金属硫化物作为 H2 析出光催化剂、还原氧化石墨烯（RGO）作为电子介体以及可见光驱动的 BiVO4 作为 O2 析出光催化剂相结合，展示了在可见光和模拟太阳光照射下的粉末状 Z 型方案水分解。这种 Z 型方案光催化剂复合材料在可见光下使用水作为唯一电子供体进行 CO2 还原时也具有活性。
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