Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions

doi:10.1021/acs.est.6b04716

HFCAS OpenIR > 中科院强磁场科学中心

	Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions
	Cao, Liang 1,2; Jiang, Zhao-Xia 3; Du, Yong-Hua 4; Yin, Xin-Mao 5,6; Xi, Shi-Bo 4; Wen, Wen 1; Roberts, Andrew P.7; Wee, Andrew T. S.5; Xiong, Yi-Min 2; Liu, Qing-Song8,9 ; Gao, Xing-Yu 1
	2017-03-07
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
摘要	As an iron oxyhydroxide, nanosized ferrihydrite (Fh) is important in Earth science, biology, and industrial applications. However, its basic structure and origin of its magnetism have long been debated. We integrate synchrotron-based techniques to explore the chemical structures of 2-line ferrihydrite and to determine the origin of its magnetism during hydrothermal aging in air. Our results demonstrate that both the magnetism and X-ray magnetic circular dichroism (XMCD) signal of 2-line ferrihydrite are enhanced with aging time, and that XMCD spectral patterns resemble that of maghemite (gamma-Fe2O3) rather than magnetite (Fe3O4). Fe L-edge and K-edge X-ray absorption spectroscopy (XAS) further indicate formation of both maghemite and hematite (alpha-Fe2O3) with increasing concentrations with longer hydrothermal aging time. Thus, magnetic enhancement with longer hydrothermal aging time is attributed to increasing maghemite concentration instead of a magnetically ordered ferrihydrite as previously reported. Moreover, L-edge and K-edge XAS spectra with different probing depths yield different ratios of these Fe oxides, which suggest the formation of a core (ferrihydrite-rich)-shell (with a mixture of both allotropes; alpha-Fe2O3 and gamma-Fe2O3) structure during hydrothermal aging. Our results provide insights into the chemical evolution of 2-line ferrihydrite that reveal unambiguously the origin of its magnetism.
文章类型	Article
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
DOI	10.1021/acs.est.6b04716
关键词[WOS]	RAY-ABSORPTION-SPECTROSCOPY ; FE K-EDGE ; MULTIPLE-SCATTERING ; STRUCTURAL MODEL ; IRON-OXIDES ; NANOCRYSTALLINE MATERIAL ; CRYSTALLITE SIZE ; AKDALAITE MODEL ; 2P ABSORPTION ; CHINESE LOESS
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(41374073 ; National Natural Science Foundation of China(41374073 ; National Natural Science Foundation of China(41374073 ; National Natural Science Foundation of China(41374073 ; Australian Research Council(DP120103952) ; Australian Research Council(DP120103952) ; Australian Research Council(DP120103952) ; Australian Research Council(DP120103952) ; 11175239 ; 11175239 ; 11175239 ; 11175239 ; 11574317 ; 11574317 ; 11574317 ; 11574317 ; 21503233) ; 21503233) ; 21503233) ; 21503233)
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000395963800020
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/32901
专题	中科院强磁场科学中心
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, High Magnet Field Lab, 350 Shushanhu Rd, Hefei 230031, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China 4.ASTAR, Inst Chem & Engn Sci, 1 Pesek Rd, Jurong Isl 627833, Singapore 5.Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117542, Singapore 6.Shenzhen Univ, Key Lab Optoelect Devices & Syst, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China 7.Australian Natl Univ, Res Sch Earth Sci, 142 Mills Rd, Canberra, ACT 2601, Australia 8.Southern Univ Sci & Technol China, Dept Marine Sci & Engn, Shenzhen 518055, Peoples R China 9.Qingdao Natl Oceanog Lab Sci & Technol, Lab Marine Geol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Cao, Liang,Jiang, Zhao-Xia,Du, Yong-Hua,et al. Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(5):2643-2651.
APA	Cao, Liang.,Jiang, Zhao-Xia.,Du, Yong-Hua.,Yin, Xin-Mao.,Xi, Shi-Bo.,...&Gao, Xing-Yu.(2017).Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(5),2643-2651.
MLA	Cao, Liang,et al."Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.5(2017):2643-2651.

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