Synthesis of TiO2 Nanopowders by Thermal Decomposition of a Titanium Peroxo Complex in the Presence of an NaCl Template

Disperse titanium dioxide was prepared by the thermal decomposition (700°C) of a titanium peroxo complex in the presence of a sodium chloride template at various precursor/template ratios. Comparative analysis was carried out against titanium dioxide prepared in the absence of templates. The prepared titanium dioxide was represented by two crystalline phases: anatase and rutile. The synthesis of nanosized TiO₂ in the presence of sodium chloride yielded an aggregate of spherical TiO₂ grains with an average diameter of 19 nm. The major crystalline phase was anatase (>90%). The increasing NaCl content in the initial mixture brought about an increase in the proportion of the <15 nm grain fraction, an increase in the proportion of the anatase phase, and an increase in the specific surface area S_sp.