Shi Jinyan, Yang Le, Zhang Jie, Wang Zejin, Zhu Wenbo, Wang Ying, Zou Zhigang
School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Qixia District, Nanjing, 210023, P. R. China.
Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Kunshan Innovation Institute of Nanjing University, Jiangsu Key Laboratory for Nanotechnology, Nanjing University, 22 Hankou Road, Gulou District, Nanjing, 210093, P. R. China.
Chemistry. 2022 Nov 16;28(64):e202202019. doi: 10.1002/chem.202202019. Epub 2022 Sep 15.
Cocatalyst plays an important role in efficient charge transfer and separation for photocatalysis. Herein, a MoS /CdS photocatalyst with MoS as cocatalyst was designed by using Mo-MOF and Cd-MOF as precursors. Due to the existence of rich sulfur vacancies and 1T phase, MoS shows strong charge capture and transport ability. The photo-generated electrons on conduction band (CB) can be bound by the sulfur vacancy of CdS and effectively transported to MoS through the compact interface between the CdS nanoparticles and 2D large-scale MoS . The optimal photocatalyst 1 %MoS /CdS exhibited dramatically improved photocatalytic hydrogen production activity, which is 28 times that of pristine CdS and even about 2 times that of 1 %Pt/CdS with same loading amount of noble metal Pt. This work highlights the role of Mo-MOF derived MoS with 1T-2H phases as a sustainable and prospective candidate of cocatalyst for improving charge separation and photocatalytic stability of MoS /CdS composites.
助催化剂在光催化的高效电荷转移和分离中起着重要作用。在此，以Mo-MOF和Cd-MOF为前驱体，设计了一种以MoS为助催化剂的MoS /CdS光催化剂。由于存在丰富的硫空位和1T相，MoS表现出较强的电荷捕获和传输能力。导带（CB）上的光生电子可以被CdS的硫空位束缚，并通过CdS纳米颗粒与二维大规模MoS之间的紧密界面有效地传输到MoS。最优的光催化剂1 %MoS /CdS表现出显著提高的光催化产氢活性，是原始CdS的28倍，甚至是相同贵金属Pt负载量的1 %Pt/CdS的约2倍。这项工作突出了具有1T-2H相的Mo-MOF衍生的MoS作为一种可持续且有前景的助催化剂候选物在改善MoS /CdS复合材料的电荷分离和光催化稳定性方面的作用。
