Abstract
Abstract Titanium dioxide (TiO 2 ) nanoparticles were synthesized from tetraethylorthotitanate (TEOT) dissolved in ethanol by using a semi-batch process in order to overcome difficulties in production of nanoparticles by a batchwise reaction. In this work, a statistical experimental design method was also used to find the effect of four parameters [ R (=H 2 O/TEOT), hydroxypropylcellulose (HPC) as a dispersant, the feed rate of reactant, and reaction temperature] on the various properties of TiO 2 particles. It was found that the optimal conditions for the preparation of monodispersed TiO 2 nanoparticles with high yield and surface area were as follows: ( R : 16, HPC: 0.0028 g ml −1 , feed rate of reactant: 3.3 ml min −1 , and reaction temperature: 28 °C). Experimental results measured by using the above optimal conditions were in agreement with theoretical data and the smallest particle size (∼10 nm in diameter) was obtained. In conclusion, the main parameters affecting the properties of TiO 2 particles were decreased in the order of HPC>feed rate of reactant> R (=H 2 O/TEOT)>reaction temperature.
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