FABRICATION OF UNIFORM TITANIA HOLLOW USING SILICA/TITANIA CORE/SHELL NANOPARTICLES

摘要

PURPOSE: A fabrication method of nano-hollow spheres using silica/titanium dioxide core/shell nanoparticles is provided to obtain titanium dioxide nano-hollow spheres of 150nm or less of diameters by thermally treating the silica/titanium dioxide core/shell nanoparticles and etching the silica core with hydrofluoric acid. CONSTITUTION: A fabrication method of nano-hollow sphere includes the following steps of: manufacturing silica/titanium dioxide core/shell nanoparticles; drying and thermally treating the silica/titanium dioxide core/shell nanoparticles; and etching the silica core of the thermally treated silica/titanium dioxide core/shell nanoparticles for 10 minutes to 3 hours using a hydrofluoric acid solution. The sizes of the silica/titanium dioxide core/shell nanoparticles are in a range between 10 and 150nm. The thermally treating temperature is in a range between 400 and 700°C. The concentration of the hydrofluoric acid solution is in a range between 0.5 and 5wt%.