Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites
	Yang, Yanting; Li, Jing; Yan, Tao; Zhu, Rixin; Yan, Liangguo; Pei, Zhiguo
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2020-03-07
卷号	562 页码:493-501
关键词	Hexavalent chromium Adsorption Photocatalytic reduction Heavy metal removal Synergetic effect
ISSN号	0021-9797
英文摘要	To evaluate the synergetic adsorption capacity of layered double hydroxide (LDH) and photocatalytic reduction property of TiO2 for aqueous Cr(VI), the Fe3O4-ZnAl-LDH and TiO2 composites (FLT) were prepared via sol-gel method. The removal efficiency of FLT composites for Cr(VI) changed with the mass ratio of Fe3O4-LDH/TiO2, and the optimal ratio was 20% (FLT-2). The adsorption efficiencies of 100 mg FLT-2 were 74% and 64% for 20 and 50 mg/L Cr(VI) solution, and the total removal ratios of Cr(VI) were all over 97% after UV irradiation. The experimental data of adsorption kinetic, adsorption isothermal, and photocatalytic reduction were consistent with the pseudo-second-order, Langmuir, and first-order reaction equations, respectively. From the X-ray photoelectron spectra analysis, FLT composites adsorbed Cr (VI) directly via surface complexation, also reduced aqueous Cr(VI) to Cr(III). The photocurrent and electrochemical impedance spectroscopy of FLT composites indicated the photo-induced electron-hole pairs were separated effectively. The regeneration results show that the FLT composites had good stability and reusability after five consecutive cycles. Therefore, FLT composites are promising materials in the disposal of wastewater containing Cr(VI). (C) 2019 Elsevier Inc. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44590]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Yang, Yanting,Li, Jing,Yan, Tao,et al. Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2020,562:493-501.
APA	Yang, Yanting,Li, Jing,Yan, Tao,Zhu, Rixin,Yan, Liangguo,&Pei, Zhiguo.(2020).Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites.JOURNAL OF COLLOID AND INTERFACE SCIENCE,562,493-501.
MLA	Yang, Yanting,et al."Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites".JOURNAL OF COLLOID AND INTERFACE SCIENCE 562(2020):493-501.