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<cfResPublDate>2011-02-05</cfResPublDate>
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<cfTitle cfLangCode='EN' cfTrans='o'>Structural study of titanium dioxide (TiO2) nanopowder prepared by sol-gel under hypercritical drying</cfTitle>
<cfAbstr cfLangCode='EN' cfTrans='o'>Nano-sized TiO2  powders  have  been  prepared  by  the  sol–gel method  under  hypercritical 
conditions  by  hydrolyzing  titanium  tetra-isopropoxide.  The  polycrystalline  structure  and 
morphology  of  the  powder  have  been  characterized  by  X-ray  diffraction  (XRD),  Fourier 
Transform  InfraRed  spectroscopy,  scanning  electron  microscopy  (SEM),  and  transmission 
electron microscopy  (TEM). The XRD  spectrum  shows  the anatase phase of  the prepared TiO2 
powder.  The  energy  dispersive  analysis  (EDS)  and  FT-IR  confirmed  the  formation  of  TiO2.  
TEM  and  SEM micrographs  showed  that  the  TiO2  grains  are micrometric  and  have  irregular 

shapes. These grains are formed by agglomeration of TiO2 nanocrystallites with an average size 
of 10 nm. </cfAbstr>
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