IHEP OpenIR
Effects of Co and Ni co-doping on the structure and reactivity of hexagonal birnessite
Yin, H; Li, H; Wang, Y; Ginder-Vogel, M; Qiu, GH; Feng, XH; Zheng, LR; Liu, F; Zheng LR(郑黎荣)
2014
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
EISSN1878-5999
Volume381Pages:10-20
AbstractNatural hexagonal birnessites are enriched in various transition metals (TMs). Many studies have examined the effects of single metal doping on the structures and properties of birnessites, but none focused on the simultaneous interaction mechanism of coprecipitation of two different TMs with birnessite. In this work Co and Ni co-doped hexagonal birnessites were synthesized and characterized by powder X-ray diffraction (XRD), elemental analysis, field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy to investigate the effects of co-doping on the structure and reactivity of birnessite and the crystal chemistry of Co and Ni. These co-doped birnessites have lower crystallinity, i.e., fewer manganese layers stacking in the c* direction, larger specific surface areas (SSAs) and increased Mn average oxidation states (AOSs) than the undoped birnessite, and Co exists in a valence of +3. Co, Ni and Mn K-edge extended X-ray absorption fine structure spectroscopy (EXAFS) spectra demonstrate an increase in edge-sharing Ni-Me (Me = Ni, Co and Mn) distances in birnessite layers with the increase of the contents of dopants while Mn-Me distances first decrease and then increase while those of Co-Me pairs are nearly constant, coupled with first a decrease and then increase of the in-plane unit-cell parameter b. The effect of co-doping on the amounts of structural Mn and K+, numbers of [MnO6] layers stacked in c* axis, and SSAs, is larger than the effects of doping with Co alone, but less than singly Ni doping. In birnessites doped with both Co and Ni, similar to 74-79% of the total Co and similar to 23-39% of the total Ni are present within the manganese layers. Compared with the spatial distribution of TM in singly doped birnessites, the coexistence of Ni hinders the incorporation of Co into the layers during birnessite crystallization; however, coprecipitation with Co has little effects, neither hindrance nor promotion, on the insertion of Ni into the layers. These results provide insight into the interaction mechanism between coexisting Co, Ni within layered Mn oxides. It further helps us to interpret the geochemical characteristics of multi-metal incorporation into natural Mn oxides and their effects on the structures and physicochemical properties of these minerals. (C) 2014 Elsevier B.V. All rights reserved.
KeywordManganese oxides Hexagonal birnessite Transition metal Co and Ni co-doping X-ray absorption fine structure spectroscopy
Subject AreaGeochemistry & Geophysics
DOI10.1016/j.chemgeo.2014.05.017
Indexed BySCI ; ADS
Language英语
WOS IDWOS:000340208500002
ADS Bibcode2014ChGeo.381...10Y
ADS URLhttps://ui.adsabs.harvard.edu/abs/2014ChGeo.381...10Y
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2014ChGeo.381...10Y/citations
Citation statistics
Cited Times:33 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224882
Collection中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Yin, H,Li, H,Wang, Y,et al. Effects of Co and Ni co-doping on the structure and reactivity of hexagonal birnessite[J]. CHEMICAL GEOLOGY,2014,381:10-20.
APA Yin, H.,Li, H.,Wang, Y.,Ginder-Vogel, M.,Qiu, GH.,...&郑黎荣.(2014).Effects of Co and Ni co-doping on the structure and reactivity of hexagonal birnessite.CHEMICAL GEOLOGY,381,10-20.
MLA Yin, H,et al."Effects of Co and Ni co-doping on the structure and reactivity of hexagonal birnessite".CHEMICAL GEOLOGY 381(2014):10-20.
Files in This Item:
File Name/Size DocType Version Access License
10773.pdf(1548KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yin, H]'s Articles
[Li, H]'s Articles
[Wang, Y]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yin, H]'s Articles
[Li, H]'s Articles
[Wang, Y]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yin, H]'s Articles
[Li, H]'s Articles
[Wang, Y]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.