Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity
	Yu, Lian; Yang, Xiaofang; He, Jie; He, Yi; Wang, Dongsheng
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2015-04-15
卷号	144 页码:107-113
关键词	Magnetic nanocomposites Photocatalyst N Core-shell structure Water treatment La-TiO2
英文摘要	A magnetically separable nitrogen and lanthanum co-doped photocatalyst gamma-Fe2O3@SiO2@N,La-TiO2 (FST) with a typical superparamagnetic property was prepared by an effective three-step approach. Specifically, the preformed monodisperse gamma-Fe2O3 nanoparticles were used as templates for directing the sequential deposition of SiO2 layer by modified Stober method and subsequent N,La-TiO2 layer by hydrothermal method. During the hydrothermal assisted TiO2 deposition, the interior black Fe3O4 nanoparticles were converted into dark-brown gamma-Fe2O3 nanoparticles. EST showed a ternary structure with a core of gamma-Fe2O3, a SiO2 mesosphere and a N,La-TiO2 (anatase) crust. SiO2 layer can prevent effectively the transfer of charges from TiO2 to gamma-Fe2O3, which avoids electrons and holes recombination at the interface. SiO2 inter-layer is also a good adsorbent for dye molecules, FST showed higher photocatalytic activity than gamma-Fe2O3@N,La-TiO2 (FT). FST is photoactive under both UV and visible light irradiation and can be easily separated from a slurry in photoreactor by the application of an external magnetic field. (c) 2015 Elsevier B.V. All rights reserved.
研究领域[WOS]	Engineering, Chemical
WOS记录号	WOS:000352664300014
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32859]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Yu, Lian,Yang, Xiaofang,He, Jie,et al. Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,144:107-113.
APA	Yu, Lian,Yang, Xiaofang,He, Jie,He, Yi,&Wang, Dongsheng.(2015).Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity.SEPARATION AND PURIFICATION TECHNOLOGY,144,107-113.
MLA	Yu, Lian,et al."Synthesis of magnetically separable N, La-doped TiO2 with enhanced photocatalytic activity".SEPARATION AND PURIFICATION TECHNOLOGY 144(2015):107-113.