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Hollow Multishelled Structured SrTiO 3 with La/Rh Co‐Doping for Enhanced Photocatalytic Water Splitting under Visible Light
Author(s) -
Wei Yanze,
Wan Jiawei,
Wang Jiangyan,
Zhang Xing,
Yu Ranbo,
Yang Nailiang,
Wang Dan
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202005345
Subject(s) - photocatalysis , photocurrent , materials science , water splitting , visible spectrum , hydrothermal circulation , catalysis , rhodium , doping , irradiation , hydrogen production , hydrogen , quantum efficiency , photochemistry , optoelectronics , chemical engineering , chemistry , physics , biochemistry , organic chemistry , nuclear physics , engineering
La‐ and Rh‐co‐doped SrTiO 3 (STO:La/Rh) hollow multishelled structures (HoMSs) are fabricated by adding La 3+ and Rh 3+ ions during the hydrothermal process of converting TiO 2 HoMSs to STO HoMSs. STO:La/Rh HoMSs have successfully expanded the light absorption edge to 520 nm. Accompanied with the benefits of the unique hierarchical structure and relatively thin shells, STO:La/Rh HoMSs exhibit elevated light‐harvesting capacity and charge separation efficiency. Compared with STO:La/Rh nanoparticles (NPs), STO:La/Rh HoMSs demonstrate enhanced photocurrent response, photocatalytic hydrogen evolution activity, and the quantum efficiency. Moreover, overall water splitting is realized by a Z ‐scheme system combining STO:La/Rh HoMSs with BiVO 4 (BVO) nanosheets with 1 wt% Pt as the co‐catalyst. Steady evolution of hydrogen and oxygen is performed under both visible light and simulated sunlight irradiation. The solar‐to‐hydrogen efficiency of double‐shelled STO:La/Rh HoMS–BVO photocatalysts reaches 0.08%, which is twofold higher than STO:La/Rh NP–BVO photocatalysts.