Constructing highly catalytic oxidation over BiOBr-based hierarchical microspheres: Importance of redox potential of doped cations
文献类型：期刊论文
| 作者 | Li, Wentao; Zou, Yubin; Geng, Xin; Xiao, Feng; An, Guangyu; Wang, Dongsheng |
| 刊名 | MOLECULAR CATALYSIS
 |
| 出版日期 | 2017-09-01 |
| 卷号 | 438期号:0页码:19-29 |
| 关键词 | Biobr Microspheres Visible Light Irradiation Fenton-like Reaction Photocatalysis Combination |
| 英文摘要 | In this work, we prepared BiOBr-based hierarchical microspheres by a simple solvothermal method. The phase structure, morphology and optical properties of catalysts were well characterized by XRD, FESEM, FTIR, UV-DR spectra, XPS valence band and BET surface area analysis. Among the Vis/catalyst/H2O2 system, Cu-BiOBr is found to be the most effective for rhodamine b degradation while Fe-BiOBr exhibits the highest catalytic activity for the mineralization of 2-chlorophenol. Hydroxyl radicals generation rate and H2O2 decomposition rate follow: Fe-BiOBr, >BiOBr >Zn-BiOBr = Ni-BiOBr =Ag-BiOBr > Cu-BiOBr, and Cu-BiOBr > Fe-BiOBr > BiOBr = Zn-BiOBr =Ni-BiOBr >Ag-BiOBr, respectively. The catalytic mechanisms under Vis/catalyst/H2O2 systems are proposed and compared, as following: (1) for BiOBr/Zn-BiOBr/Ni-BiOBr/Ag-BiOBr, the activation of H2O2 by photoelectrons to generate hydroxyl radical; (2) for Fe-BiOBr, the reaction of Fe(II) or photoelectrons with H2O2 to produce hydroxyl radical, and Fe(III) is reduced by photoelectrons to Fe(II); (3) for Cu-BiOBr, the activation of H2O2 by photoelectrons to generate hydroxyl radical that probably oxides Cu(II) to Cu(III), and the reaction of Cu(I) with H2O2 to generate Cu(III). The trapping experiments display that holes and hydroxyl radicals (or Cu(III)) have dominant roles. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39678]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Wentao,Zou, Yubin,Geng, Xin,et al. Constructing highly catalytic oxidation over BiOBr-based hierarchical microspheres: Importance of redox potential of doped cations[J]. MOLECULAR CATALYSIS,2017,438(0):19-29. |
| APA | Li, Wentao,Zou, Yubin,Geng, Xin,Xiao, Feng,An, Guangyu,&Wang, Dongsheng.(2017).Constructing highly catalytic oxidation over BiOBr-based hierarchical microspheres: Importance of redox potential of doped cations.MOLECULAR CATALYSIS,438(0),19-29. |
| MLA | Li, Wentao,et al."Constructing highly catalytic oxidation over BiOBr-based hierarchical microspheres: Importance of redox potential of doped cations".MOLECULAR CATALYSIS 438.0(2017):19-29. |
入库方式： OAI收割
来源：生态环境研究中心
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