Tien Tsung-Mo, Chen Edward L
Coastal Water and Environment Center, College of Hydrosphere Science, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan.
Nanomaterials (Basel). 2023 Oct 15;13(20):2763. doi: 10.3390/nano13202763.
Researchers have made efforts to develop high-productivity photocatalysts for photocatalytic hydrogen production to reduce the problem of a lack of energy. Bulk semiconductor photocatalysts mainly endure particular limitations, such as low visible light application, a quick recombination rate of electron-hole pairs, and poor photocatalytic efficiency. The major challenge is to improve solar-light-driven heterostructure photocatalysts that are highly active and stable under the photocatalytic system. In this study, the proposed nano-heterojunction exhibits a great capacity for hydrogen production (871.2 μmol g h), which is over 8.1-fold and 12.3-fold higher than that of the bare MoS and bare α-FeO samples, respectively. It is demonstrated that the MoS/α-FeO heterojunction gives rise to an enhanced visible light response and accelerated photoinduced charge carrier separation. This work provides an improved visible light absorption efficiency and a narrowed energy band gap, and presents a "highway" for electron-hole pairs to promote transfer and inhibit the combination of photoinduced charge carriers for the utilization of nano-heterojunction photocatalysts in the field of hydrogen production.
研究人员已致力于开发用于光催化制氢的高生产率光催化剂，以减少能源短缺问题。块状半导体光催化剂主要存在一些特定限制，如可见光利用率低、电子 - 空穴对复合速率快以及光催化效率差等。主要挑战在于改进在光催化体系下具有高活性和稳定性的太阳能驱动异质结构光催化剂。在本研究中，所提出的纳米异质结展现出巨大的产氢能力（871.2 μmol g h），分别比裸MoS和裸α - FeO样品高出8.1倍和12.3倍。结果表明，MoS/α - FeO异质结产生了增强的可见光响应并加速了光生载流子的分离。这项工作提高了可见光吸收效率并缩小了能带隙，为电子 - 空穴对提供了一条“高速公路”，以促进转移并抑制光生载流子的复合，从而在制氢领域利用纳米异质结光催化剂。
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