In order to hydrogen evolution by water splitting, with appropriate design, the effective sites of the efficient heterostructured photocatalysts are boosted, and the directional transfer of the photo carriers is ensured. In this paper, we report the p-n-p heterostructured CuO/CdS/CoWO₄ nanocomposite formed with CoWO₄ deposited using microwave method on CuO/CdS prepared by combining CuO and CdS synthesized by hydrothermal method and microwave method, respectively. In the asset of an electric field formed by the S-scheme heterostructure of p-n-p CuO/CdS/CoWO₄, efficient directional transfer of charge carriers is achieved and recombination of beneficial charge carriers is suppressed. The rate of hydrogen evolution is 457.9 μmol g⁻¹ h⁻¹ in the existence of CuO/CdS/CoWO₄, which is 3.14, 11.99, 40.88 and 102.9, times as that of CuO/CdS, CdS, CuO and CoWO₄, respectively. This study offers new perspectives on the preparation of p-n-p type rationally designed photocatalysts with improved photocatalytic efficiency and stability for hydrogen generation applications.

为了通过水分解析氢，通过适当的设计，提高高效异质结构光催化剂的有效位点，并确保光载流子的定向转移。在本文中，我们报道了利用微波法沉积在CuO/CdS上形成的pnp异质结构CuO/CdS/CoWO _4纳米复合材料，该复合材料分别由水热法和微波法合成的CuO和CdS制备而成。在由pnp CuO/CdS/CoWO ₄的S型异质结构形成的电场的资产中，实现了电荷载流子的有效定向转移并抑制了有益电荷载流子的复合。析氢速率为 457.9 μmol g ^-1  h_{CuO/CdS/CoWO 4}存在时的^-1，分别是CuO/CdS、CdS、CuO和CoWO ₄的3.14、11.99、40.88和102.9倍。本研究为制备合理设计的 pnp 型光催化剂提供了新的视角，该催化剂具有更高的光催化效率和稳定性，可用于制氢应用。