期刊
NANOMATERIALS
卷 12, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano12081382
关键词
bismuth oxybromide (BiOBr); Ce-doping modification; doping energy level; visible light; bisphenol A (BPA)
类别
资金
- National Natural Science Foundation of China [21906021]
- Fundamental Research Funds for the Central Universities [3203009407]
Bismuth oxybromide (BiOBr) has potential as a visible-light-driven photocatalyst due to its special layered structure. Ce doping can modify its band structure and enhance its photocatalytic performance.
Bismuth oxybromide (BiOBr), with its special layered structure, is known to have potential as a visible-light-driven photocatalyst. However, the rapid recombination and short lifetime of the photogenerated carriers of BiOBr restrict its photocatalytic efficiency for the degradation of organic pollutants. Given the similar ionic size of Ce and Bi, Ce atoms might be easily introduced into the crystal of BiOBr to tailor its band structure. In this study, Ce doped BiOBr (Ce-BiOBr) samples with different percentages of Ce contents were prepared via a hydrothermal method. The intrinsic photocatalytic efficiency of Ce-0.2-BiOBr for the degradation of bisphenol A (BPA) was 3.66 times higher than that of pristine BiOBr under visible light irradiation. The mechanism of Ce-doping modification for the enhanced photocatalytic performance was demonstrated based on a series of experiments and DFT calculation. The narrowed bandgap, the enhanced charge separation efficiency and Ce-doping energy level contributed to the remarkable photocatalytic performance of Ce-BiOBr.
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