Study of Fe(II) oxidation in ground magnetite
作者： R.M.Torres Sanchez , E.M. Curt , C. Volzone , R.C. Mercader , A.L. Cavalieri
DOI: 10.1016/0025-5408(90)90020-3
关键词: Analytical chemistry 、 Mössbauer spectroscopy 、 Iron oxide 、 Maghemite 、 Chemistry 、 Photoemission spectroscopy 、 X-ray photoelectron spectroscopy 、 Point of zero charge 、 Oxide 、 Magnetite
摘要: Abstract The oxidation of Fe(II) produced by dry oscillating milling on natural magnetite was investigated X-ray photoelectron spectroscopy (XPS), determinations point zero charge (PZC), and Mossbauer spectroscopy. Examinations surface samples (original milled at different times), XPS, indicate an increase in Fe(III) content evidenced modifications Fe 2p O ls photopeaks. deconvolution photopeaks agree with Fe(III)/Fe(II) relationship 2.5 to 2.9 from original sample 40' respectively. Determinations PZC let us infer the formation oxide mixture, grinding, 3 4 iron higher (that could be α-Fe 2 or γ-Fe ). By presence revealed amounts that increased grinding time.
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sci-hub.se 参考文章(17)
K. Haneda, A.H. Morrish, On the hyperfine field of γ-Fe2O3 small particles Physics Letters A. ,vol. 64, pp. 259- 262 ,(1977) , 10.1016/0375-9601(77)90736-8
P Mills, J L Sullivan, A study of the core level electrons in iron and its three oxides by means of X-ray photoelectron spectroscopy Journal of Physics D. ,vol. 16, pp. 723- 732 ,(1983) , 10.1088/0022-3727/16/5/005
Vladimir V Boldyrev, Evgenii G Avvakumov, Mechanochemistry of Inorganic Solids Russian Chemical Reviews. ,vol. 40, pp. 847- 859 ,(1971) , 10.1070/RC1971V040N10ABEH001977
E. Mendelovici, A. Sagarzazu, R. Villalba, Processings of iron oxides at room temperature. II. Mechanochemical reaction effects on the structure and surface of pure, synthetic lepidocrocite Materials Research Bulletin. ,vol. 17, pp. 1017- 1023 ,(1982) , 10.1016/0025-5408(82)90127-1
J. W. Stucki, Analysis of Iron-Bearing Clay Minerals by Electron Spectroscopy for Chemical Analysis (ESCA)* Clays and Clay Minerals. ,vol. 24, pp. 289- 292 ,(1976) , 10.1346/CCMN.1976.0240603
A.L. Cavalieri, E.F. Aglietti, A.N. Scian, J.M. Porto López, Mechanochemical alterations in magnetite crystals Reactivity of Solids. ,vol. 2, pp. 215- 222 ,(1986) , 10.1016/0168-7336(86)80084-5
M. Tschapek, L. Tcheichvili, C. Wasowski, The Point of Zero Charge (pzc) of Kaolinite and SiO2 + Al2O3 Mixtures Clay Minerals. ,vol. 10, pp. 219- 229 ,(1974) , 10.1180/CLAYMIN.1974.010.4.01
E. Mendelovici, R. Villalba, A. Sagarzazu, Topotactic conversions of γ-FeOOH and comparative transformation methods of iron oxides in magnetic spinels Materials Chemistry and Physics. ,vol. 10, pp. 579- 584 ,(1984) , 10.1016/0254-0584(84)90006-3
Shigeharu Kittaka, Tetsuo Morimoto, Isoelectric point of metal oxides and binary metal oxides having spinel structure joint international conference on information sciences. ,vol. 75, pp. 398- 403 ,(1980) , 10.1016/0021-9797(80)90464-6
C.R Brundle, T.J Chuang, K Wandelt, Core and valence level photoemission studies of iron oxide surfaces and the oxidation of iron Surface Science. ,vol. 68, pp. 459- 468 ,(1977) , 10.1016/0039-6028(77)90239-4