Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation

doi:10.1016/j.matchemphys.2018.01.046

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	Structure and properties of vanadium-doped alpha-MnO2 and enhanced Pb2+ adsorption phenollphotocatalytic degradation
	Chen, Suifeng 1; Zhang, Shuang 1; Wang, Tingyu 1; Lei, Ziyan 1; Zhu, Mengqiang 2; Dai, Xiaoxue 1; Liu, Fan 1; Li, Jiangshan 3; Yin, Hui 1
刊名	MATERIALS CHEMISTRY AND PHYSICS
	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
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000426223800032
内容类型	期刊论文
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.