Wang Huiqin, Yan Chenlong, Xu Mengyang, Li Jinze, Zhang Ziyang, Song Xianghai, Liu Xin, Huo Pengwei
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Inorg Chem. 2024 Sep 16;63(37):17274-17286. doi: 10.1021/acs.inorgchem.4c03112. Epub 2024 Aug 30.
S-scheme heterojunction photocatalyst-coupled plasma-resonance effect can enhance the response range and absorption of light and charge transfer, and, at the same time, obtain strong redox ability, which is an effective way to improve CO conversion. In this work, plasma S-scheme heterojunctions of Pd/BiOBr/CdS with heterogeneous interfaces have been successfully constructed by a simple hydrothermal method. The possible reaction mechanism was proposed by in situ infrared, ultraviolet-visible spectroscopy (UV-vis), electron paramagnetic resonance (ESR), density functional theory (DFT), and electrochemical techniques. It was proved that the plasma S-scheme heterojunction can enhance the charge separation efficiency and improve the photocatalytic activity. When the loading ratio is Pd-10%-BiOBr/CdS, it has the best performance, and the CO yield is 30.24 μmol/g, which is 15 and 30 times that of pure BiOBr and CdS, respectively. The results show that with the strong absorption of photon energy and the special electron transfer mode of S-scheme heterojunction, the charge can be effectively separated and transferred, and the photocatalytic activity is significantly improved. This study provides a useful strategy for charge transfer kinetics of plasma S-scheme heterojunction photocatalysts.
S型异质结光催化剂耦合等离子体共振效应可以拓宽光响应范围、增强光吸收以及促进电荷转移，同时获得较强的氧化还原能力，这是提高CO转化的有效途径。在本工作中，通过简单的水热法成功构建了具有异质界面的Pd/BiOBr/CdS等离子体S型异质结。利用原位红外、紫外-可见光谱（UV-vis）、电子顺磁共振（ESR）、密度泛函理论（DFT）和电化学技术对可能的反应机理进行了研究。结果表明，等离子体S型异质结能够提高电荷分离效率并增强光催化活性。当负载比例为Pd-10%-BiOBr/CdS时，其性能最佳，CO产率为30.24 μmol/g，分别是纯BiOBr和CdS的15倍和30倍。结果表明，凭借对光子能量的强吸收以及S型异质结特殊的电子转移模式，电荷能够有效分离和转移，光催化活性显著提高。本研究为等离子体S型异质结光催化剂的电荷转移动力学提供了有益的策略。
