具有内电场和光热效应协同作用的 CoCoS 纳米棒用于增强光催化 H2 演化。

CoCoS Nanorods with an Internal Electric Field and Photothermal Effect Synergistically for Boosting Photocatalytic H Evolution.

机构信息

Henan Key Laboratory of Function Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China.

Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

出版信息

Int J Mol Sci. 2022 Aug 28;23(17):9756. doi: 10.3390/ijms23179756.

The paper reports a strategy to synthesize CdCoS nanorods (NRs) via a one-pot solvothermal method. Remarkably, the pencil-shaped CdCoS NRs with a large aspect ratio and good polycrystalline plane structure significantly shorten the photogenerated carrier transfer path and achieve fast separation. An appropriate amount of Co addition enhances visible light-harvesting and generates a photothermal effect to improve the surface reaction kinetics and increases the charge transfer rate. Moreover, the internal electric field facilitates the separation and transfer of carriers and effectively impedes their recombination. As a result, the optimized CdCoS NRs yield a remarkable H evolution rate of 8.009 mmol·g·h, which is approximately 7.2 times higher than that of pristine CdS. This work improves the photocatalytic hydrogen production rate by tuning and optimizing electronic structures through element addition and using the photothermal synergistic effect.

该论文报道了一种通过一锅溶剂热法合成 CdCoS 纳米棒（NRs）的策略。值得注意的是，铅笔形 CdCoS NRs 具有大的纵横比和良好的多晶面结构，显著缩短了光生载流子的转移路径，实现了快速分离。适量的 Co 掺杂增强了可见光的吸收并产生光热效应，从而提高了表面反应动力学，增加了电荷转移速率。此外，内电场有助于载流子的分离和转移，并有效抑制了它们的复合。因此，优化后的 CdCoS NRs 的 H2 析出速率达到了 8.009 mmol·g·h，约为原始 CdS 的 7.2 倍。这项工作通过元素掺杂和利用光热协同效应来调节和优化电子结构，提高了光催化产氢速率。