Monoclinic dibismuth tetraoxide: A new visible-light-driven photocatalyst for environmental remediation

IMR OpenIR

	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.; jimyu@cuhk.edu.hk
	2015
发表期刊	APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN	0926-3373
卷号	176 页码:444-453
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.
部门归属	[wang, wanjun ; 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
关键词	Photocatalysis Bismuth Oxide Pollutant Degradation Bacterial Disinfection
收录类别	sci
语种	英语
WOS记录号	WOS:000356549200044
引用统计	被引频次：162[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75004
专题	中国科学院金属研究所
通讯作者	jimyu@cuhk.edu.hk
推荐引用方式 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.,...&jimyu@cuhk.edu.hk.(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.