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Sol–gel synthesis and characterization of iron oxide–silica nanocomposites
Author(s) -
Tongpool R.,
Jindasuwan S.
Publication year - 2004
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1857
Subject(s) - hematite , crystallization , nanocomposite , chemical engineering , materials science , iron oxide , oxide , sol gel , coating , spin coating , amorphous solid , porosity , silicon oxide , silicon , inorganic chemistry , metallurgy , composite material , nanotechnology , chemistry , organic chemistry , silicon nitride , engineering
The films of iron oxide–silica nanocomposites have been prepared using the sol–gel process and spin‐coating technique. The film morphology was dependent on precursors, additives, ageing duration and the molar ratios between iron (Fe) and silicon (Si) of the coating solution. Hematite was derived from iron oxide sol while those obtained from silica and iron oxide–silica sols were relatively amorphous, indicating that crystallization and particle growth of hematite were inhibited by the silica network. Hydroxypropylcellulose (HPC) was found to reduce cracks successfully. It increased the film porosity and did not interrupt the crystallization of the host. The film containing a Fe:Si:HPC ratio of 50:50:0.005 showed the smoothest surface. Copyright © 2004 John Wiley & Sons, Ltd.