Efficient Degradation of Rhodamine B with the BiOCl/Bi2Fe4O9 Heterojunction Photocatalyst

• Published in: Langmuir Vol. 39; no. 48; pp. 17146 - 17153
• Main Authors: Qi, Shuyan, Guan, Ling, Zhang, Ruiyan, Wu, Shanqiang, Zhang, Kaiyao
• Format: Journal Article
• Language: English
• Published: 05.12.2023
• ISSN: 1520-5827
• DOI: 10.1021/acs.langmuir.3c02074

BiOCl/Bi2Fe4O9 photocatalyst was prepared by a coprecipitation-hydrothermal method. The heterojunction structure generated by the composite of BiOCl and Bi2Fe4O9 reduced the electron-hole recombination efficiency and improved the degradation rate of RhB. At 240 min, 20% BiOCl/Bi2Fe4O9 represented the excellent degradation effect on 10 mg/L RhB; the degradation efficiency reached 99.56%; and the reaction rate constant was 0.01534 min-1, which was 5.76 times and 6.06 times that of Bi2Fe4O9 and BiOCl, respectively. The main active substance of the photocatalytic degradation of dyes was superoxide radical O2-·. Five cycles of the experiment proved the relative stability of BiOCl/Bi2Fe4O9.