Novel recyclable BiOBr/Fe3O4/RGO composites with remarkable visible-light photocatalytic activity. Issue 34 (27th May 2020)

• Record Type: Journal Article
• Authors: Zheng, Mingkun; Ma, Xinguo; Hu, Jisong; Zhang, Xinxin; Li, Di; Duan, Wangyang
• Is Part Of: RSC advances. Volume 10:Issue 34(2020)
• Page Start: 19961
• Page End: 19973
• Publication Date: 2020-05-27
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra01668c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Magnetic BiOBr/Fe3 O4 /RGO composites with remarkable photocatalytic capability were prepared by a simple hydrothermal method to load 3D flower-like microspherical BiOBr onto the surface of Fe3 O4 /RGO. Abstract : Magnetic BiOBr/Fe3 O4 /RGO composites with remarkable photocatalytic capability were prepared by a simple hydrothermal method to load 3D flower-like microspherical BiOBr onto the surface of Fe3 O4 /RGO. Under visible-light irradiation ( λ > 420 nm), the BiOBr/Fe3 O4 /RGO composite with 56% mass percentage of Fe3 O4 /RGO shows the optimal removal ability for Rhodamine B, and the total removal efficiency is 96%. The coupling of Fe3 O4 /RGO and BiOBr elevates the conduction band of BiOBr, which enhances the reduction level of BiOBr/Fe3 O4 /RGO composites. Ultimately, based on experiments and theoretical calculations, an n-type Schottky contact formed at the heterojunction interface between RGO doped with Fe3 O4 and BiOBr is proposed for photoexcited charge transfer. The RGO with great adsorptivity plays a major role in the photocatalysts composed of BiOBr, RGO and Fe3 O4 . Further, BiOBr/Fe3 O4 /RGO composites with permanent-magnetism can be recovered and reused easily by external magnetic field and maintain a total removal efficiency of 90% after four cycles.