School of Chemistry and Chemical Engineering, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing 211189, PR China.
Dalton Trans. 2023 May 22;52(20):6730-6738. doi: 10.1039/d3dt00477e.
Solar-driven water splitting offers a leading-edge approach to storing abundant and intermittent solar energy and producing hydrogen as a clean and sustainable energy carrier. More importantly, constructing well-designed photocatalysts is a promising approach to develop clean hydrogen energy. In this paper, flower spherical UiO-66-(SCH)/ZnInS (UiOSC/ZIS) photocatalysts are successfully synthesized by a simple two-step hydrothermal method, and they exhibit high hydrogen production activity in light-driven water splitting. The optimized 30-UiOSC/ZIS (the content of UiOSC was 30 mg) composite exhibits optimal hydrogen production activity with a hydrogen production of 3433 μmol g h, which is 5 and 235 times higher than that of pure ZIS and UiOSC, respectively. In addition, a long-cycling stability test has shown that the UiOSC/ZIS composite has good stability and recyclability. Experimental and characterization results show the formation of a type-II heterojunction between UiOSC and ZIS. This effectively suppresses the recombination of electrons-holes and promotes the carrier transfer, thus significantly improving the hydrogen production performance. This research further promotes the application of UiO-66-(SCH) in the field of photocatalytic hydrogen production and provides a reference for the rational design of UiO-66-based composite photocatalysts.
太阳能驱动的水分解提供了一种前沿的方法来储存丰富和间歇的太阳能，并生产氢气作为一种清洁和可持续的能源载体。更重要的是，构建设计良好的光催化剂是开发清洁氢能的一种有前途的方法。在本文中，通过简单的两步水热法成功合成了花状 UiO-66-(SCH)/ZnInS（UiOSC/ZIS）光催化剂，它们在光驱动水分解中表现出高的制氢活性。优化的 30-UiOSC/ZIS（UiOSC 的含量为 30mg）复合材料表现出最佳的制氢活性，制氢量为 3433μmol g h，分别是纯 ZIS 和 UiOSC 的 5 倍和 235 倍。此外，长循环稳定性测试表明，UiOSC/ZIS 复合材料具有良好的稳定性和可回收性。实验和表征结果表明，UiOSC 和 ZIS 之间形成了 II 型异质结。这有效地抑制了电子-空穴的复合，并促进了载流子的转移，从而显著提高了制氢性能。本研究进一步推动了 UiO-66-(SCH)在光催化制氢领域的应用，为基于 UiO-66 的复合光催化剂的合理设计提供了参考。
