|Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation|
|Wang, Wanjun; Chen, Xingqiu; Liu, Gang; Shen, Zhurui; Xia, Dehua; Wong, Po Keung; Yu, Jimmy C.; firstname.lastname@example.org
|发表期刊||APPLIED CATALYSIS B-ENVIRONMENTAL
|摘要||A 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.|
; shen, zhurui
; yu, jimmy c.] chinese univ hong kong, dept chem, shatin, hong kong, peoples r china
; [wang, wanjun
; shen, zhurui
; yu, jimmy c.] chinese univ hong kong, inst environm energy & sustainabil, shatin, hong kong, peoples r china
; [chen, xingqiu
; liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
; [shen, zhurui] tianjin univ, sch mat sci & engn, minist educ, key lab adv ceram & machining technol, tianjin 300072, peoples r china
; [xia, dehua
; wong, po keung] chinese univ hong kong, sch life sci, shatin, hong kong, peoples r china
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.
Wang, Wanjun.,Chen, Xingqiu.,Liu, Gang.,Shen, Zhurui.,Xia, Dehua.,...&email@example.com.(2015).Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation.APPLIED CATALYSIS B-ENVIRONMENTAL,176,444-453.
Wang, Wanjun,et al."Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation".APPLIED CATALYSIS B-ENVIRONMENTAL 176(2015):444-453.