Synthesis and characterization of nano-sized aluminium oxide and its application in the fabrication of polyaniline-alumina nan
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Date
2006-01
Authors
Teoh Geik Ling
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia.
Abstract
Fibrillar alumina nanoparticles of high aspect ratio with diameter of
around 2 nm and length of about 70 nm have been successfully fabricated
in bulk quantities for the first time via sol-gel process. In the course of
preparation, the influences of the hydrolysis period, aging temperature, pH,
the reactant molecular ratio and the type of solvent on the formation of
area, pore volume and the pore diameter of
calcined alumina determined by nitrogen
experiments were
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SYNTHESIS AND CHARACTERIZATIONS OF NANO-SIZED
ALUMINIUM OXIDE AND ITS APPLICATION IN THE FABRICATION OF
POLYANILINE-ALUMINA NANOFIBERS
27AI
alumina nanofibers were illustrated. Morphological studies were performed
by TEM. The effects of various calcination temperatures on the phase
transformation of AI2O3 were also demonstrated. The as-prepared sample
gave amorphous phase assigned as pseudoboehmite, which was entirely
converted into a-AI2O3 by calcination at 1050 °C for 5 h as verified by XRD
patterns. The BET surface
adsorption-desorption
a function of the calcination temperature. Specific
surface areas as high as 335 m2/g were exhibited by the calcined solids at
540 °C. Molecular characterizations were also perfomed by FTIR and
MAS NMR spectroscopy. Thermal behavior of alumina nanofibers was
investigated by TGA and DSC.
Description
Keywords
Nanostructured materials , Nanostructures , Synthesis and characterization of nano