Enhanced photocatalytic performance and mechanism of Ag-decorated LaFeO3 nanoparticles

doi:10.1007/s10971-017-4332-0

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	Enhanced photocatalytic performance and mechanism of Ag-decorated LaFeO3 nanoparticles
	Ye, Yongchun; Yang, Hua; Li, Ruishan; Wang, Xiangxian
刊名	JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
	2017-05
卷号	82 期号:2 页码:509-518
关键词	LaFeO3 nanoparticles Ag-LaFeO3 composites Polyacrylamide gel route Active species Photocatalytic mechanism
ISSN号	0928-0707
DOI	10.1007/s10971-017-4332-0
英文摘要	Spherical LaFeO3 nanoparticles with an average size of 35 nm were synthesized by a polyacrylamide gel route. Ag nanoparticles of 8-18 nm in size were decorated onto LaFeO3 particle surface by a chemical reduction method to yield Ag-LaFeO3 composites. The samples were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, and photoluminescence spectroscopy. It is found that LaFeO3 particles have two bandgap energies of 2.59 and 2.24 eV, which undergo almost no change when decorated with Ag nanoparticles. photoluminescence spectra demonstrate that the decoration of LaFeO3 particles with Ag nanoparticles leads to a decreased recombination rate of photogenerated electrons and holes. The photocatalytic activity of the samples was evaluated by degrading Rhodamine B under simulated-sunlight irradiation. Compared to bare LaFeO3 particles, Ag-LaFeO3 composites exhibit an obviously enhanced photocatalytic activity. The formed aEuro cent OH was examined by photoluminescence spectroscopy using terephthalic acid as the aEuro cent OH scavenger, revealing an enhanced yield on the irradiated Ag-LaFeO3 composites. To clarify the role of active species in the photocatalysis, the effect of ammonium oxalate (h(+) scavenger), ethanol (aEuro cent OH scavenger), benzoquinone (aEuro cent O-2 (-) scavenger), and N-2 on the Rhodamine B degradation as well as the aEuro cent OH yield was investigated. Based on the experimental results, aEuro cent OH and aEuro cent O-2 (-) are suggested to be the main active species causing the dye degradation.
资助项目	National Natural Science Foundation of China[51262018][51662027]
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000399151600022
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33272]
专题	理学院
通讯作者	Yang, Hua
作者单位	Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Ye, Yongchun,Yang, Hua,Li, Ruishan,et al. Enhanced photocatalytic performance and mechanism of Ag-decorated LaFeO3 nanoparticles[J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,2017,82(2):509-518.
APA	Ye, Yongchun,Yang, Hua,Li, Ruishan,&Wang, Xiangxian.(2017).Enhanced photocatalytic performance and mechanism of Ag-decorated LaFeO3 nanoparticles.JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,82(2),509-518.
MLA	Ye, Yongchun,et al."Enhanced photocatalytic performance and mechanism of Ag-decorated LaFeO3 nanoparticles".JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 82.2(2017):509-518.