Open AccessPreparation of g-C3N4/BiOBr Composites and Their Enhanced Visible-Light Photocatalytic Performance
Author(s) -
Xianming Ren,
Hao Zhan,
Yunxiang Shen,
Cao Chen
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1637/1/012076
Subject(s) - photocatalysis , materials science , rhodamine b , adsorption , scanning electron microscope , composite material , microstructure , precipitation , specific surface area , chemical engineering , catalysis , chemistry , organic chemistry , meteorology , engineering , physics
Novel g-C 3 N 4 /BiOBr composites were prepared successfully by a simple liquid-phase precipitation method. The morphologies and microstructures of the photocatalysts were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). With dye Rhodamine B as a model pollutant, the photocatalytic activities of the g-C 3 N 4 /BiOBr composites with various mass ratio was explored, and the possible photocatalytic mechanism was investigated briefly. The results showed that g-C 3 N 4 /BiOBr composites were formed successfully, and some fine flakes of g-C 3 N 4 embedded in the staggered spaces and surface of BiOBr nanosheets with thickness of 50-80 nm. Compared with pure g-C 3 N 4 and pure BiOBr, g-C 3 N 4 /BiOBr composites showed enhanced activities for both adsorption and photocatalytic decoloration of RhB. The optimum mass ratio was found to be 1:4 (g-C 3 N 4 : BiOBr) exhibiting the highest photocatalytic activity. The combination between g-C 3 N 4 and BiOBr in composites could increase the surface area, so then improve the adsorption properties, moreover, it could contribute to separation and migration for the charge carriers. The effects of various scavengers on photocatalytic efficiency revealed that h + played predominant role for the photo-decoloration of RhB on g-C 3 N 4 /BiOBr composites.