Journal ArticleDOI
Transformation of akaganeite into magnetite in aqueous hydrazine suspensions
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TLDR
In this paper, Akaganeite suspended in hydrazine-containing aqueous solutions at pH 9.5-11.5 and 373 K, is transformed into magnetite through a dissolution-recrystallization mechanism.About:
This article is published in Reactivity of Solids.The article was published on 1986-10-01. It has received 29 citations till now. The article focuses on the topics: Magnetite & Akaganéite.read more
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Phase transformations of iron oxides, oxohydroxides, and hydrous oxides in aqueous media
Miguel A. Blesa,Egon Matijević +1 more
TL;DR: In this paper, the authors reviewed the available information regarding the pathways of processes leading to precipitation of iron (hydrous) oxides in aqueous salt solutions and discussed the importance of the early hydrolysis stages in determining the nature and the morphology of the solid phases.
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Design Strategies for Shape-Controlled Magnetic Iron Oxide Nanoparticles
Alejandro G. Roca,Lucía Gutiérrez,Lucía Gutiérrez,Helena Gavilán,Maria Eugênia Fortes Brollo,Sabino Veintemillas-Verdaguer,María del Puerto Morales +6 more
TL;DR: This review is focused on the synthesis routes for the production of uniform anisometric magnetite/maghemite nanoparticles with different morphologies like cubes, rods, disks, flowers and many others, such as hollow spheres, worms, stars or tetrapods.
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Formation of magnetite in the presence of ferric oxyhydroxides
TL;DR: In this paper, the products of the reactions of ferric oxyhydroxides with ferrous species in O 2 -free aqueous systems containing Cl − were characterized by XRD, FTIR and TEM.
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Facile Microwave Process in Water for the Fabrication of Magnetic Nanorods
Irena Milosevic,Hicham Jouni,Catalina David,Fabienne Warmont,Dominique Bonnin,Laurence Motte +5 more
TL;DR: In this paper, a simple and fast method through microwave assisted reduction using akaganeite β-FeOOH nanorods and hydrazine as precursors and reductor, respectively.
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Fe3O4 nanowires synthesized by electroprecipitation in templates
TL;DR: In this paper, an electrochemical technique for growing Fe3O4 nanostructures was presented. But the technique was not suitable for growing nanoscale templates, and the results showed that the resulting nanowires were not magnetoresistance.
References
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Ferric hydrous oxide sols
Egon Matijević,Paul Scheiner +1 more
TL;DR: In this article, the methods of preparation of ferric hydrous oxide sots consisting of particles, uniform in shape, of narrow size distribution are described in detail, and complete domains are given in terms of the ferric salt and corresponding acid concentrations which delineate regions of particle formation of given chemical composition and shape.
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Effect of pH on the formation of goethite and hematite from ferrihydrite
U. Schwertmann,E. Murad +1 more
TL;DR: In this paper, the existence of two competitive formation processes is suggested: goethite is formed via solution, preferably from monovalent Fe(III) ions [Fe(OH)2+ and Fe(OH 4−], and hematite by internal rearrangement and dehydration within the ferrihydrite aggregates.
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Conditions for the Formation of Fe3O4 by the Air Oxidation of Fe(OH)2 Suspensions.
TL;DR: In this article, the optimum conditions for the formation of Fe3O4 by the air oxidation of Fe(OH)2 were studied for neutral suspensions obtained by mixing NaOH and FeSO4 solutions in various values of R( = 2NaOH/FeSO4) were subjected to oxidation with air at various temperatures.
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Preparation of well-defined colloidal particles by thermal decomposition of metal chelates. I. Iron oxides
TL;DR: In this paper, a well defined hematite and magnetite colloidal particles of different morphologies were prepared by hydrothermal aging of strongly alkaline solutions of ferric salts and triethanolamine (TEA) at 250°C.