Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes

doi:10.1016/j.optmat.2019.109644

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	Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes
	Guan, Sitao 1; Yang, Hua 1; Sun, Xiaofeng 2; Xian, Tao 2
刊名	Optical Materials
	2020-02-01
卷号	100
关键词	Bromine compounds Charge transfer Decomposition Electron transport properties Fourier transform infrared spectroscopy Heterojunctions Image enhancement Iron compounds Lanthanum compounds Light absorption Light sources Nanoparticles Optical properties Oxidation Photocatalytic activity Photodegradation Rate constants Rhodamine B Rhodium compounds Stripping (dyes) Characterization techniques Charge transfer mechanisms Microplates Optical absorption properties Photo catalytic degradation Photo-fenton degradation Photoelectrochemical measurements Surface functional groups
ISSN号	09253467
DOI	10.1016/j.optmat.2019.109644
英文摘要	Herein we have designed and fabricated a new type of LaFeO3/BiOBr heterojunction photocatalysts with Z-scheme charge transfer mechanism. The composite photocatalysts were constructed by coupling LaFeO3 nanoparticles with BiOBr microplates. Various advanced characterization techniques (e.g., SEM, TEM, XRD, UV–vis DRS, XPS, PL spectroscopy, FTIR photoelectrochemical measurements) were employed to elucidate the structures, micro-morphologies, element/composition valence states, optical absorption properties, surface functional groups and electron/hole pair separation behavior of the prepared LaFeO3/BiOBr photocatalysts. The photocatalytic and photo-Fenton degradation activities of the as-prepared LaFeO3/BiOBr photocatalysts were investigated by decomposing rhodamine B (RhB) aqueous solution, where simulated sunlight was used as the light source. Among the samples, the 20%LaFeO3/BiOBr composite photocatalyst manifests the highest photocatalytic degradation performance for RhB (η = 98.2% for 30 min reaction). The photodegradation activity of 20%LaFeO3/BiOBr is determined from the reaction rate constants to be about 21.0 and 1.3 times as large as that of bare LaFeO3 nanoparticles and BiOBr mcroplates, respectively. Furthermore, by adding an amount of H2O2 in the reaction solution, the photo-Fenton decomposition performances of the LaFeO3/BiOBr photocatalysts can be further enhanced. Z-scheme electron transfer process and photo-Fenton synergistic mechanism were used to explain the improved photodegradation and photo-Fenton degradation performances of the LaFeO3/BiOBr heterojunction photocatalysts. © 2019 Elsevier B.V.
WOS研究方向	Materials Science ; Optics
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000521515700027
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115497]
专题	理学院
作者单位	1.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China; 2.College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining; 810008, China
推荐引用方式 GB/T 7714	Guan, Sitao,Yang, Hua,Sun, Xiaofeng,et al. Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes[J]. Optical Materials,2020,100.
APA	Guan, Sitao,Yang, Hua,Sun, Xiaofeng,&Xian, Tao.(2020).Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes.Optical Materials,100.
MLA	Guan, Sitao,et al."Preparation and promising application of novel LaFeO3/BiOBr heterojunction photocatalysts for photocatalytic and photo-Fenton removal of dyes".Optical Materials 100(2020).