Surface Engineering of WO3/BiVO4 to Boost Solar Water-Splitting

Catalysts

Rong Wu¹  Yuncheng Cao¹  Zheng Xing²  Ming Ma³  Bobo Wang³  Jiangyu Li³  Wei Tang³ 

[1] School of Physics Science and Technology, Xinjiang University, Urumqi 830046, China;Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel;Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;

关键词: FTO/WO₃/BiVO₄ heterojunction;    photoelectrochemical;    post-modification;    surface engineering;    solar water-splitting;   

DOI  :  10.3390/catal10050556

来源: DOAJ

【 摘 要 】

Single-phase photoanodes often suffer inferior charge transport, which can be mitigated by constructing efficient heterojunctions. Thus, we have fabricated a fluorine-doped tin oxide (FTO)/WO₃/BiVO₄ heterojunction using hydrothermal and spin-coating methods. Surface engineering was exploited to further accelerate the reaction kinetics, which was achieved via post-modification with NaOH solution. This treatment alters the surface chemical state of the BiVO₄ nanoparticles, leading to enhanced charge transport and surface water oxidation processes. As a result, the optimized sample can produce a photocurrent more than two times that of WO₃. The simple post-treatment provides a viable and cost-effective strategy for promoting the photoelectric properties of photoanodes.

【 授权许可】

Unknown