Effect of synthesis conditions on the size and aspect ratio of acicular iron(III) alpha-oxyhydroxide particles prepared in the FeSO4-NH4OH-O-2-H2O system

Authors
Karateeva, EY Mikhailichenko, AI Krylova, AV Nefedova, NV
Citation
Ey. Karateeva et al., Effect of synthesis conditions on the size and aspect ratio of acicular iron(III) alpha-oxyhydroxide particles prepared in the FeSO4-NH4OH-O-2-H2O system, INORG MATER, 37(1), 2001, pp. 37-40
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INORGANIC MATERIALS
ISSN journal
00201685 → ACNP
Volume
37
Issue
1
Year of publication
2001
Pages
37 - 40
Database
ISI
SICI code
0020-1685(200101)37:1<37:EOSCOT>2.0.ZU;2-#
Abstract
The conditions for the synthesis of iron(III) alpha -oxyhydroxide in the Fe SO4-NH4OH-O-2-H2O system were optimized (pH 7): [FeSO4] = 0.7-1 mol/l, [NH4 OH] = 3 mol/l, reaction temperature between 42 and 55 degreesC, and oxygen flow rate in the range 7-50 l/h. Increasing the solution pH leads to the fo rmation of iron(III) alpha -oxyhydroxide particles with an increased aspect ratio. In the best samples of iron(III) alpha -oxyhydroxide obtained, the particle size is 0.25-0.30 mum, and the aspect ratio is 10-15.