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Synthesis and Characterization of Uniform Fine Particles of Iron(III) Hydroxide/Oxide
Author(s) -
Haq Ikram Ul,
Haider Farzana
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000028
Subject(s) - chemistry , hematite , calcination , hydroxide , amorphous solid , potassium hydroxide , inorganic chemistry , potassium nitrate , urea , iron oxide , sulfate , oxide , potassium silicate , potassium sulfate , homogeneous , nuclear chemistry , chemical engineering , potassium , mineralogy , catalysis , silicate , crystallography , organic chemistry , physics , engineering , thermodynamics
Iron(III) hydroxide was precipitated from the homogeneous solutions, containing variuos amounts of iron(III) nitrate, potassium sulfate, and urea, by heating at 85 °C for different periods of time (5‐30 min). The precipitated solids were either in the form of gel or dispersed particles of different shapes and sizes, depending upon the composition of the reactant mixtures. The as‐prepared solids were amorphous in nature and were formulated as Fe(OH) 3 .H 2 O. On calcinations at 800 °C for 1 h, the latter converted into crystalline compound, composed of α‐Fe 2 O 3 (hematite). The calcined particles retained the original features of their precursors to a maximum extent.