Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation
文献类型：期刊论文
| 作者 | Chen, Suifeng1; Zhang, Shuang1; Wang, Tingyu1; Lei, Ziyan1; Zhu, Mengqiang2; Dai, Xiaoxue1; Liu, Fan1; Li, Jiangshan3; Yin, Hui1 |
| 刊名 | MATERIALS CHEMISTRY AND PHYSICS
 |
| 出版日期 | 2018 |
| 卷号 | 208页码:258-267 |
| 关键词 | Mn oxide V doping Lead Phenol X-ray absorption spectroscopy |
| ISSN号 | 0254-0584 |
| DOI | 10.1016/j.matchemphys.2018.01.046 |
| 英文摘要 | Vanadium (V)-doped cryptomelane was synthesized and characterized by powder X-ray diffraction, electron microscopy, N-2 adsorption, diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. Vanadium doping does not change the basic crystal structure but slightly decreases the lattice parameters (a, b, c, beta and cell volume) and increases the coherent scattering domain (CSD) sizes (16-19 nm). These V-doped cryptomelane materials are granular particles with increased specific surface areas (149-183 m(2) g(-1)) and increased concentrations of hydroxyl groups on the surfaces with increasing V doping. Both V 2p(3/2) spectra and V K-edge X-ray absorption near edge spectroscopy indicates that V exists in +5. Substitution of V5+ for Mn4+ in cryptomelane framework results in reduction in Mn average oxidation state and increase in bond lengths of Mn-O in [MnO6] unit, edge- and corner-sharing Mn-Mn(V) pairs. These V-doped materials have greatly increased adsorption capacities for Pb2+ (937-1146 mmol kg(-1)). Doping similar to 1.4 wt.% V can significantly enhance cryptomelane optical absorption properties and thus photocatalytic degradation of phenol, i.e., with a TOC removal rate of similar to 77%. These results can facilitate the modification and application of environmental friendly Mn oxide materials in pollution control and remediation. (C) 2018 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000426223800032 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4247]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac ; 2.Univ Wyoming, Dept Ecosyst Sci & Management, 1000 E Univ Ave, Laramie, WY 82071 USA; 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Chen, Suifeng,Zhang, Shuang,Wang, Tingyu,et al. Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation[J]. MATERIALS CHEMISTRY AND PHYSICS,2018,208:258-267. |
| APA | Chen, Suifeng.,Zhang, Shuang.,Wang, Tingyu.,Lei, Ziyan.,Zhu, Mengqiang.,...&Yin, Hui.(2018).Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation.MATERIALS CHEMISTRY AND PHYSICS,208,258-267. |
| MLA | Chen, Suifeng,et al."Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation".MATERIALS CHEMISTRY AND PHYSICS 208(2018):258-267. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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