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Bi 4 O 5 BrI Solid Solution towards Boosted Photocatalytic Reduction and Oxidation Activities Induced by Efficient Carrier Separation
Author(s) -
Zhang Jia,
Wang Zhen,
Liu Lu,
Hu Baorong,
Zhao Yilei,
Zhao Shuang,
Zhao Wenting,
Li Shuang,
Chen Xi,
Hai Xin
Publication year - 2021
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.202000240
Subject(s) - photocatalysis , bismuth , solid solution , materials science , semiconductor , adsorption , degradation (telecommunications) , band gap , catalysis , chemical engineering , photochemistry , optoelectronics , chemistry , computer science , metallurgy , organic chemistry , telecommunications , engineering
Abstract Semiconductor photocatalysis is considered a promising technology for destroying pollutants, while the faint carrier separation efficiency of the photocatalyst is one of the main limitations for obtaining high performance. This study reports a solid solution strategy to achieve effective carrier separation in Bi 4 O 5 Br x I 2− x . The solid solution structure endows Bi 4 O 5 Br x I 2− x with proper light adsorption, tunable band gap, and effective separation of photogenerated electrons and holes. As a result, Bi 4 O 5 Br x I 2− x exhibits reduction and oxidation activities for highly efficient photocatalytic Cr(VI) reduction and tetracycline hydrochloride (HTC) degradation under visible light irradiation, with the activity reaching the maximum at x = 1. Within 30 min, the removal rates of Cr(VI) and HTC reach 90% and 100%, respectively. This study not only provides an effective strategy to increase the carrier separation of bismuth‐based semiconductors, but also opens new opportunities to rationally design other solid solution catalysts with high performance in wastewater treatment.