Abstract
Hollow spherical TiO2 were successfully fabricated through a template-free solvothermal route using TBT (titanium(IV) butoxide) as the titanium source and absolute ethanol as the solvent. The structural parameters like cavity size, wall thickness and overall sphere diameter of hollow spherical TiO2 were effectively controlled through tuning TBT amount. By increasing the amount of TBT, the overall sphere diameter and wall thickness of the hollow spherical TiO2 increased, the cavity structure first expanded and then gradually collapsed with the TBT increasing. Hollow spherical TiO2 possessed high light reflection and low thermal conductivity due to its hollow structure and the inherent properties, showing distinguished thermal insulation property. The structural parameters of hollow spherical TiO2 played an important role for improving of thermal insulation property. Moreover, hollow spherical TiO2 as fillers can significantly enhance the thermal insulation, UV-shielding and mechanical preformance of polyacrylate film.
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