Boron-doped rutile TiO2/ anatase TiO2/ ZrTiO4 ternary heterojunction photocatalyst with optimized phase interface and band structure

Liu, Changqing; Li, Xu; Xu, Chenggang; Wu, Yuanting; Hu, Xuefeng; Hou, Xianghui

Abstract

To improve the photocatalytic performance of TiO2-based heterostructures, Z-scheme/Ⅱ-type rutile TiO2 (R)/anatase TiO2 (A)/ZrTiO4 ternary heterojunction photocatalyst was designed and prepared via a facile one-step calcining strategy. Phase interface and band structure of the materials were controlled and optimized by regulating R–TiO2/A–TiO2 mass ratio in the TiO2 (A, R)/ZrTiO4 structures using boron doping. The highest photocatalytic performance and excellent catalytic stability of Rhodamine B removal was observed from the heterojunction with a low R–TiO2/A–TiO2 mass ratio of 0.066, even after five testing cycles, accompanying with low photoluminescence intensity and electrochemical impedance, high photocurrent and charge carrier density (5.12 × 1022 cm−3), and a positive shift of valence band position (from +2.06 to + 2.16 eV). The increased photodegradation behaviour was due to the remarkably enhanced separation efficiency and improved redox ability of the photo-induced charge carriers as a result of the high content of oxygen vacancies and the formed anatase TiO2/rutile TiO2 Z-scheme heterojunction.

Citation

Liu, C., Li, X., Xu, C., Wu, Y., Hu, X., & Hou, X. (2020). Boron-doped rutile TiO2/ anatase TiO2/ ZrTiO4 ternary heterojunction photocatalyst with optimized phase interface and band structure. Ceramics International, 46(13), 20943-20953. https://doi.org/10.1016/j.ceramint.2020.05.152

• Journal Article Type: Article
• Acceptance Date: May 14, 2020
• Online Publication Date: May 30, 2020
• Publication Date: 2020-09
• Deposit Date: Jul 29, 2020
• Publicly Available Date: May 31, 2021
• Journal: Ceramics International
• Print ISSN: 0272-8842
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 46
• Issue: 13
• Pages: 20943-20953
• DOI: https://doi.org/10.1016/j.ceramint.2020.05.152
• Keywords: Process Chemistry and Technology; Materials Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/4542061
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0272884220314401