Synthesis of nanosized TiO2 powder by Sol-Gel method in acidic conditions


Department of Chemistry, Islamic Azad University, Ahar Branch, Ahar, Iran


The preparation of nano-sized TiO2 by titanium tetraisopropoxide (Ti(OiPr)4) via sol-gel
method using acid as a catalyst is investigated and the optimized conditions concerning the
proportional amount of acid, water, alcohol is established by XRD and SEM. The effect of
calcination temperature on phase transformation of TiO2 (rutile, anatase and brookite) was
determined by XRD. The smallest grain size of TiO2 powder we have obtained is 25 nm for
anatase at 400 ºC by controlling the acidity and the mole ratio of starting materials.


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