Molten-salt growth of Bi5FeTi3O15-based composite to dramatically boost photocatalytic performance

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 415; p. 113306
• Main Authors: Shao, Luhua, Yang, Zhenfei, Li, Sijian, Xia, Xinnian, Liu, Yutang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2021
• Subjects: Bi5FeTi3O15; Molten-salt growth; Perovskite; Photocatalysis; Perovskite; Molten-salt growth; Bi5FeTi3O15; Photocatalysis
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2021.113306

[Display omitted] •Bi5FeTi3O15-based composite were successfully synthesized via a molten-salt growth path.•The BFTO-M exhibited dramatically enhanced photocatalytic activity relative to BFTO-H and BFTO-S.•The photocatalytic mechanism for BFTO-M system was elucidated. Bi5FeTi3O15-based composite was successfully synthesized via a molten-salt growth path, and the Bi5FeTi3O15-based composite synthesized by molten salt method (BFTO-M) was involved in photocatalytic system for the first time. For comparison, the Bi5FeTi3O15 samples synthesized by hydrothermal process and solid state reaction method (BFTO-H and BFTO-S) were prepared. The BFTO-M exhibited a typical morphology of nanosheets, and possessed higher carrier separation efficiency relative to BFTO-H and BFTO-S. XRD results indicated that the as-obtained BFTO-M sample was a composite composed of BiOCl, Bi5FeTi3O15 and Bi2O2.75. RhB could hardly be degraded in BFTO-H or BFTO-S reaction system, while RhB was dramatically degraded in BFTO-M reaction system with the degradation efficiency of 95.8 %. A possible visible-light driven catalytic mechanism was exposed.