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Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation
Wang, Wanjun1,2; Chen, Xingqiu3; Liu, Gang3; Shen, Zhurui1,2,4; Xia, Dehua5; Wong, Po Keung5; Yu, Jimmy C.1,2
Corresponding AuthorYu, Jimmy C.(jimyu@cuhk.edu.hk)
2015-10-01
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume176Pages:444-453
AbstractA new visible-light-driven photocatalyst, monoclinic dibismuth tetraoxide (m-Bi2O4), has been discovered. This simple oxide with mixed valent states (Bi3+ and Bi5+) has a band gap energy of 2.0 eV, and is responsive to wavelength up to 620 nm. The first-principle calculations within the hybrid density functional framework (HSE) indicate that m-Bi2O4 is a typical indirect-gap semiconductor. It shows much higher photocatalytic degradation activity as well as photostability than some of the well-investigated highly efficient photocatalysts, such as CdS and Bi2O3. Not only typical dyes and colorless aromatic compounds, including rhodamine B, methyl orange, methyl blue, phenol and 4-nitrophenol, but also bacterial (Escherichia coli) cells can be effectively degraded/inactivated in the presence of m-Bi2O4. The electronic potential of band structure is studied and a photocatalytic mechanism is also proposed, in which both (OH)-O-center dot and direct h(+) oxidation play important roles in the degradation process. Our discovery highlights the potential of developing Bi2O4-based photocatalysts as a new class of highly active, stable and safe photocatalyst for versatile pollutant degradation and disinfection under visible light. (C) 2015 Published by Elsevier B.V.
KeywordPhotocatalysis Bismuth oxide Pollutant degradation Bacterial disinfection
DOI10.1016/j.apcatb.2015.04.026
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000356549200044
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80951
Corresponding AuthorYu, Jimmy C.
Affiliation1.Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
2.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Shatin, Hong Kong, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Tianjin Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China
5.Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Wanjun,Chen, Xingqiu,Liu, Gang,et al. Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2015,176:444-453.
APA Wang, Wanjun.,Chen, Xingqiu.,Liu, Gang.,Shen, Zhurui.,Xia, Dehua.,...&Yu, Jimmy C..(2015).Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation.APPLIED CATALYSIS B-ENVIRONMENTAL,176,444-453.
MLA Wang, Wanjun,et al."Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation".APPLIED CATALYSIS B-ENVIRONMENTAL 176(2015):444-453.
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