Jin Min, Yang Xiaotang, Wang Xuesheng, Zhang Zhijie
College of Materials, Shanghai Dianji University, Shanghai 201306, China.
School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China.
J Colloid Interface Sci. 2025 Feb 15;680(Pt B):235-245. doi: 10.1016/j.jcis.2024.11.107. Epub 2024 Nov 16.
Photothermocatalytic CO reduction has been considered as a green and sustainable strategy for solar-to-fuel conversion, since it can utilize the solar energy to simultaneously provide heat input and produce photogenerated charge carriers. To this end, exploring photothermal catalysts with broad-band absorption, high photo-heat conversion and charge separation efficiency is highly desirable. In this work, an innovative CsBiBr/MoS (CBB/MoS) composite has been elaborately constructed to investigate the photothermocatalytic performance towards CO reduction. In this composite, MoS plays dual roles: with photoinduced self-heating effect, it can act as an extra heater to accelerate the catalytic reaction, and meanwhile serves as a cocatalyst to promote charge separation by forming S-scheme heterojunction with CBB. As expected, the developed CBB/MoS composite delivered outstanding photothermocatalytic activity for CO reduction without any extra heat input, with the CO production rate reaching 172.79 μmol gh. As confirmed by experimental tests and theoretical calculations, the superior photothermocatalytic CO reduction performance of CBB/MoS was attributed to the synergetic effect of high photo-thermo transformation efficiency and highly improved charge separation. The present work offers a potential strategy for developing highly-efficient photothermal catalysts used in artificial photosynthesis.
光热催化CO还原被认为是一种用于太阳能到燃料转化的绿色可持续策略，因为它可以利用太阳能同时提供热输入并产生光生电荷载流子。为此，非常需要探索具有宽带吸收、高光热转换和电荷分离效率的光热催化剂。在这项工作中，精心构建了一种创新的CsBiBr/MoS（CBB/MoS）复合材料，以研究其对CO还原的光热催化性能。在这种复合材料中，MoS起着双重作用：具有光致自热效应，它可以作为额外的加热器来加速催化反应，同时作为助催化剂通过与CBB形成S型异质结来促进电荷分离。正如预期的那样，所开发的CBB/MoS复合材料在没有任何额外热输入的情况下对CO还原表现出出色的光热催化活性，CO产率达到172.79 μmol g⁻¹ h⁻¹。经实验测试和理论计算证实，CBB/MoS优异的光热催化CO还原性能归因于高光热转化效率和高度改善的电荷分离的协同效应。目前的工作为开发用于人工光合作用的高效光热催化剂提供了一种潜在策略。
