Tang Diyong, Xu Desheng, Luo Zhipeng, Ke Jun, Zhou Yuan, Li Lizhong, Sun Jie
Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environmental Science, South-Central Minzu University, Wuhan 430074, China.
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China.
Nanomaterials (Basel). 2022 Jul 18;12(14):2455. doi: 10.3390/nano12142455.
Developing suitable photocatalysts for the oxygen evolution reaction (OER) is still a challenging issue for efficient water splitting due to the high requirements to create a significant impact on water splitting reaction kinetics. Herein, -type BiWO with flower-like hierarchical structure and -type CuO quantum dots (QDs) are coupled together to construct an efficient S-scheme heterojunction, which could enhance the migration efficiency of photogenerated charge carriers. The electrochemical properties are investigated to explore the transportation features and donor density of charge carriers in the S-scheme heterojunction system. Meanwhile, the as-prepared S-scheme heterojunction presents improved photocatalytic activity towards water oxidation in comparison with the sole BiWO and CuO QDs systems under simulated solar light irradiation. Moreover, the initial O evolution rate of the CuO QDs/BiWO heterojunction system is 2.3 and 9.7 fold that of sole BiWO and CuO QDs systems, respectively.
由于对水分解反应动力学产生显著影响有很高要求，开发适用于析氧反应（OER）的光催化剂对于高效水分解仍然是一个具有挑战性的问题。在此，具有花状分级结构的 - 型BiWO与 - 型CuO量子点（QDs）耦合在一起，构建了一种高效的S型异质结，这可以提高光生电荷载流子的迁移效率。研究了电化学性质，以探索S型异质结系统中电荷载流子的传输特征和施主密度。同时，与单独的BiWO和CuO QDs系统相比，所制备的S型异质结在模拟太阳光照射下对水氧化表现出更高的光催化活性。此外，CuO QDs/BiWO异质结系统的初始析氧速率分别是单独的BiWO和CuO QDs系统的2.3倍和9.7倍。
