Adsorption and photocatalytic reduction of aqueous Cr(VI) by Fe3O4-ZnAl-layered double hydroxide/TiO2 composites
文献类型：期刊论文
| 作者 | Yang, Yanting; Li, Jing; Yan, Tao; Zhu, Rixin; Yan, Liangguo; Pei, Zhiguo
|
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 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. |
| 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. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。