Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions | |
Cao, Liang1,2; Jiang, Zhao-Xia3; Du, Yong-Hua4; Yin, Xin-Mao5,6; Xi, Shi-Bo4; Wen, Wen1; Roberts, Andrew P.7; Wee, Andrew T. S.5; Xiong, Yi-Min2; Liu, Qing-Song8,9 | |
刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
2017-03-07 | |
卷号 | 51期号:5页码:2643-2651 |
DOI | 10.1021/acs.est.6b04716 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | RAY-ABSORPTION-SPECTROSCOPY ; FE K-EDGE ; MULTIPLE-SCATTERING ; STRUCTURAL MODEL ; IRON-OXIDES ; NANOCRYSTALLINE MATERIAL ; CRYSTALLITE SIZE ; AKDALAITE MODEL ; 2P ABSORPTION ; CHINESE LOESS |
WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
语种 | 英语 |
WOS记录号 | WOS:000395963800020 |
资助机构 | 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) ; 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) |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/32901] |
专题 | 合肥物质科学研究院_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. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论