4.6 Article

In situ fabrication of BiOBr/BiFeWO6 heterojunction with excellent photodegradation activity under visible light

期刊

JOURNAL OF SOLID STATE CHEMISTRY
卷 303, 期 -, 页码 -

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2021.12246

关键词

BiOBr/BiFeWO6 heterojunction; Photocatalysis; Organic pollutants; Stability

资金

  1. Natural Science Foundation of Shandong Province [ZR2020MB139]
  2. SDUST Research Fund [2018YQJH102]
  3. Qingchuang Science and Technology Program of Shandong Province University [2019KJD004]

向作者/读者索取更多资源

The novel BiOBr/BiFeWO6 heterojunction showed excellent photocatalytic performance under visible light irradiation, with a degradation efficiency of 96.3% for Rhodamine B. The synergistic interaction between BiOBr/BiFeWO6 contributed to the improved photocatalytic performance, enhancing the separation of photogenerated carriers and visible light absorption.
A novel visible-light-driven BiOBr/BiFeWO6 heterojunction was prepared through a simple hydrothermal route. The physicochemical properties of BiOBr/BiFeWO6 nanocomposites were systematically characterized. The existence of a clear interface between BiOBr and BiFeWO6 could be obtained by transmission electron microscopy, indicating the formation of heterojunction. Rhodamine B (RhB) was used to investigate the photocatalytic performance of BiOBr/BiFeWO6 nanocomposites under visible light irradiation ( lambda > 420 nm). The degradation efficiency of BiOBr/BiFeWO6-40 nanocomposite reached 96.3 % within 90 min. The improved photocatalytic performance is mainly due to the synergistic interaction between BiOBr/BiFeWO6. It is beneficial to the separation of photogenerated carriers and the absorption of visible light. In addition, long-term stability results indicate that BiOBr/BiFeWO6 heterojunction may be an excellent material for effective degradation of dyes from wastewater and may be explored for large-scale application in the future. Finally, a possible mechanism is proposed for the catalytic degradation of RhB by the BiOBr/BiFeWO6 heterojunction. This work provides a convenient and dependable method to synthesize BiOBr/BiFeWO6 nanocomposite, which might be a promising candidate for large-scale application in wastewater treatment.

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