The valence and site occupancy of substituting metals in magnetite spinel structure Fe3-xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation

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	The valence and site occupancy of substituting metals in magnetite spinel structure Fe3-xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation
	Liang, Xiaoliang ; Zhong, Yuanhong ; Zhu, Sanyuan ; He, Hongping ; Yuan, Peng ; Zhu, Jianxi ; Jiang, Zheng
刊名	SOLID STATE SCIENCES
	2013
卷号	15 页码:CONCATENATE(Sheet1!I368,-Sheet1!J368)
ISSN号	1293-2558
英文摘要	Four series of substituted magnetite (Fe3-xMxO4, M = Cr, Mn, Co and Ni) were characterized by X-ray diffraction (XRD), X-ray absorption near-edge structure (XANES) spectroscopy, and thermogravimetry and differential thermal analysis (TG-DSC). XRD patterns confirmed the formation of samples with the spine! structure. XANES showed the valence and site occupancy of the substituting cations. Cr cations are in the valence of +3 and occupy the octahedral sites. The valences of Mn cation are +2 and +3. Mn2+ and Mn3+ cations preferentially entered the tetrahedral and octahedral sites, respectively. Both Co and Ni cations have a valence of +2 and mainly occupy the octahedral sites. The introduction of Cr and Ni cations obviously increases the amount of superficial hydroxyl groups. The incorporation of Mn, Co and Ni enhances the oxidation temperature of magnetite. All the four kinds of substituting cations in this study increase the temperature of phase transformation from maghemite (gamma-Fe2O3) to hematite (alpha-Fe2O3). The mechanism of substitution changing the temperatures of oxidation and phase transformation was also discussed. (C) 2012 Elsevier Masson SAS. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000315070700019
公开日期	2014-06-13
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13644]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Liang, Xiaoliang,Zhong, Yuanhong,Zhu, Sanyuan,et al. The valence and site occupancy of substituting metals in magnetite spinel structure Fe3-xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation[J]. SOLID STATE SCIENCES,2013,15:CONCATENATE(Sheet1!I368,-Sheet1!J368).
APA	Liang, Xiaoliang.,Zhong, Yuanhong.,Zhu, Sanyuan.,He, Hongping.,Yuan, Peng.,...&Jiang, Zheng.(2013).The valence and site occupancy of substituting metals in magnetite spinel structure Fe3-xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation.SOLID STATE SCIENCES,15,CONCATENATE(Sheet1!I368,-Sheet1!J368).
MLA	Liang, Xiaoliang,et al."The valence and site occupancy of substituting metals in magnetite spinel structure Fe3-xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation".SOLID STATE SCIENCES 15(2013):CONCATENATE(Sheet1!I368,-Sheet1!J368).