Enhanced Photocatalytic Removal of Uranium(VI) from Aqueous Solution by Magnetic TiO2/Fe3O4 and Its Graphene Composite

doi:10.1021/acs.est.6b05313

	Enhanced Photocatalytic Removal of Uranium(VI) from Aqueous Solution by Magnetic TiO2/Fe3O4 and Its Graphene Composite
	Zheng, LR; Li ZJ(李子杰); Huang ZW(黄志伟); Guo WL(郭文路); Wang L(王琳); Zheng LR(郑黎荣); Chai ZF(柴之芳); Shi WQ(石伟群); Li, ZJ; Huang, ZW
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2017
卷号	51 期号:10 页码:5666-5674
ISSN号	0013-936X
DOI	10.1021/acs.est.6b05313
文献子类	Article
英文摘要	The separation and recovery of uranium from radioactive wastewater is important from the standpoints of environmental protection and uranium reuse. In the present work, magnetically collectable TiO2/Fe3O4 and its graphene composites were fabricated and utilized for the photocatalytical removal of U(VI) from aqueous solutions. It was found that, under ultraviolet (UV) irradiation, the photoreactivity of TiO2/Fe3O4 for the reduction of U(VI) was 19.3 times higher than that of pure TiO2, which is strongly correlated with the Fe and additional Fe(II) generated from the reduction of Fe3O4 by TiO2 photoelectrons. The effects of initial uranium concentration, solution pH, ionic strength, the composition of wastewater, and organic pollutants on the U(VI) removal by TiO2/Fe3O4 were systematically investigated. The results demonstrated its excellent performance in the cleanup of uranium contamination. As graphene can efficiently attract the TiO2 photoelectrons and thus decrease their transfer to Fe3O4, the photodissolution of Fe3O4 in the TiO2/graphene/Fe3O4 composite can be largely alleviated compared to that of the TiO2/Fe3O4, rendering this ternary composite a much higher stability. In addition, scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray absorption near edge spectroscopy (XANES), and X-ray photoelectron spectroscopy (XPS) were used to explore. the reaction mechanisms.
电子版国际标准刊号	1520-5851
WOS关键词	VISIBLE-LIGHT IRRADIATION ; WASTE-WATER ; EFFICIENT REMOVAL ; TIO2 NANOCRYSTALS ; XPS SPECTRA ; REDUCTION ; CR(VI) ; OXIDE ; U(VI) ; IONS
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000401674400035
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284943]
专题	高能物理研究所_多学科研究中心高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zheng, LR,Li ZJ,Huang ZW,et al. Enhanced Photocatalytic Removal of Uranium(VI) from Aqueous Solution by Magnetic TiO2/Fe3O4 and Its Graphene Composite[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(10):5666-5674.
APA	Zheng, LR.,李子杰.,黄志伟.,郭文路.,王琳.,...&Shi, WQ.(2017).Enhanced Photocatalytic Removal of Uranium(VI) from Aqueous Solution by Magnetic TiO2/Fe3O4 and Its Graphene Composite.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(10),5666-5674.
MLA	Zheng, LR,et al."Enhanced Photocatalytic Removal of Uranium(VI) from Aqueous Solution by Magnetic TiO2/Fe3O4 and Its Graphene Composite".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.10(2017):5666-5674.