Microwave-Assisted Fabrication of Visible-Light Activated BiOBr-Nanoplate Photocatalyst
In recent years, visible-light activated photocatalysis has become a major field of intense researches for the higher efficiency of solar energy utilizations. Many attempts have been made on the modification of wide band gap semiconductors, while more and more efforts emphasize on cost-effective synthesis of visible-light activated catalysts. In this work, BiOBr nanoplates with band gap of visible-light range are synthesized through a promising microwave solvothermal method. The treatment time period and temperature dependent BiOBr nanosheets of various particle sizes are investigated through SEM. BiOBr synthesized under the condition of 160°C for 60 mins shows the most uniform particle sizes around 311 nm and the highest surface-to-volume ratio on account of its smallest average particle sizes compared with others. It exhibits the best photocatalytic behavior among all samples in RhB degradation.
 Leung M.K.H., Tang S.M., Lam R.C.W., Leung D.Y.C., Yam W.C., Ng S.P., Vrijmoed L.L.P., Parallel-plate Solar Photocatalytic reactor for air purification: semi-empirical correlation, modeling, and optimization,” Solar Energy, 2006, 80: 949-955.
 Ni M., Leung M.K.H., Leung D.Y.C., Sumathy K., A Review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production, Renewable and Sustainable Energy Reviews, 2007; 11(3): 401-425.
 Shang J., Hao W. C., Lv X. J., Wang T. M., Wang X. L., Du Y., Dou S. X., Xie T. F., Wang D. J., Wang J., Bismuth oxybromide with reasonable photocatalytic reduction activity under visible light, ACS Catalysis 2014.
 Liu Z. S., Wu B. T., Xiang D. H., Zhu Y. B., Effect of solvents on morphology and photocatalytic activity of BiOBr synthesized by solvothermal method, Materials Research Bulletin 2012; 47: 3753-3757.
 Wang X. L., Yang J., Chen Y. Y., Zhang Y. M., Tang Y., EDTA-modified hydrothermal synthesis of a novel four-leaf clover-shape BiOBr microstructure, Materials Letters 2014; 116: 171-174.
 Zhang L., Cao X.F., Chen X. T., Xue Z. L., BiOBr hierarchical microspheres: Microwave-assisted solvothermal synthesis, strong adsorption and excellent photocatalytic properties, Journal of Colloid and Interface Science 2011;354: 630-636.
 Pan L. K., Liu X.J., Zhuo S. and Chang Q.S., Nanophotocatalysts via microwave-assisted solution-phase synthesis for efficient photocatalysis, Journal of Materials Chemistry A 2013, 1, 8299-8326.