Author(s): Xiong, XY (Xiong, Xinyu); Jin, YR (Jin, Yaran); Wang, HW (Wang, Haiwang); He, P (He, Ping); Xiang, X (Xiang, Xiao); Hu, PC (Hu, Pengcheng); Liu, KF (Liu, Kefan); Wei, QQ (Wei, Qingquan); Wang, BZ (Wang, Bingzhu)

Source: MATERIALS CHEMISTRY AND PHYSICS Volume: 281 Article Number: 125824 DOI: 10.1016/j.matchemphys.2022.125824 Published: APR 1 2022

Abstract: In this paper, CdS nanoparticles with uniform grain sizes of 40-80 nm were prepared using oleic acid and oleylamine as surfactants by a hydrothermal method. Then, to promote the separation of charge carriers, CdS nanoparticles were loaded on WO3 nanorods to obtained CdS/WO3 heterojunction photocatalyst by a selfassemble method. The structure of CdS/WO3 was studied by XRD, SEM, TEM, XPS and zeta potential. In addition, the photocatalytic performance of CdS/WO3 was researched by UV-Vis, PL spectra and H2 evolution tests under visible light. The results showed that constructing heterojunction improved the separation of charge carriers and the hydrogen evolution rate of CdS/WO3 (mass ratio = 1:3) was up to 35.48 mu mol/g/h, which is the best and 68.39% higher than pure CdS. What's more, it was determined that the electronic migration mechanism in CdS/WO3 is the Z-scheme by analyzing the results of H2 evolution tests and EPR.

Accession Number: WOS:000767350100003

ISSN: 0254-0584

eISSN: 1879-3312

Full Text: https://www.sciencedirect.com/science/article/pii/S0254058422001304?via%3Dihub