Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis   by a novel anatase/titanate nanosheet composite: Synergetic promotion   effect and autosynchronous doping

doi:10.1016/j.jhazmat.2016.06.002

CORC > 北京大学 > 环境科学与工程学院

	Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis by a novel anatase/titanate nanosheet composite: Synergetic promotion effect and autosynchronous doping
	Liu, Wen ; Sun, Weiling ; Borthwick, Alistair G. L. ; Wang, Ting ; Li, Fan ; Guan, Yidong
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2016
关键词	Titanate nanosheet Synergetic promotion Autosynchronous doping Photocatalysis Combined pollution DEPOSITED TITANATE NANOTUBES CR-DOPED TIO2 TITANIUM-DIOXIDE ANATASE TIO2 CHLORINATED PHENOLS HYDROTHERMAL METHOD AQUEOUS-SOLUTIONS ACTIVATED CARBON IONIC-STRENGTH ADSORPTION
DOI	10.1016/j.jhazmat.2016.06.002
英文摘要	Clean-up of wastewaters with coexisting heavy metals and organic contaminants is a huge issue worldwide. In this study, a novel anatase/titanate nanosheet composite material (labeled as TNS) synthesized through a one-step hydrothermal reaction was demonstrated to achieve the goal of simultaneous removal of Cr(VI) and 4-cholophenol (4-CP) from water. TEM and XRD analyses indicated the TNS was a nano-composite of anatase and titanate, with anatase acting as the primary photocatalysis center and titanate as the main adsorption site. Enhanced photocatalytic removal of co-existent Cr(VI) and 4-CP was observed in binary systems, with apparent rate constants (k(1)) for photocatalytic reactions of Cr(VI) and 4-CP about 3.1 and 2.6 times of that for single systems. In addition, over 99% of Cr(VI) and 4-CP was removed within 120 min through photocatalysis by TNS at pH 7 in the binary system. Mechanisms for enhanced photocatalytic efficiency in the binary system are identified as: (1) a synergetic effect on the photo-reduction of Cr(VI) and photo-oxidation of 4-CP due to efficient separation of electron-hole pairs, and (2) autosynchronous doping because of reduced Cr(III) adsorption onto TNS. Furthermore, TNS could be efficiently reused after a simple acid-base treatment. (C) 2016 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [51508006]; Natural Science Foundation of the Colleges and Universities in Jiangsu Province [15KJB610011]; SCI(E); EI; PubMed; ARTICLE; wzl0025@auburn.edu; yidongguan@nuist.edu.cn; 385-393; 317
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433292]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Liu, Wen,Sun, Weiling,Borthwick, Alistair G. L.,et al. Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis by a novel anatase/titanate nanosheet composite: Synergetic promotion effect and autosynchronous doping[J]. JOURNAL OF HAZARDOUS MATERIALS,2016.
APA	Liu, Wen,Sun, Weiling,Borthwick, Alistair G. L.,Wang, Ting,Li, Fan,&Guan, Yidong.(2016).Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis by a novel anatase/titanate nanosheet composite: Synergetic promotion effect and autosynchronous doping.JOURNAL OF HAZARDOUS MATERIALS.
MLA	Liu, Wen,et al."Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis by a novel anatase/titanate nanosheet composite: Synergetic promotion effect and autosynchronous doping".JOURNAL OF HAZARDOUS MATERIALS (2016).