Preparation and optical property of TiO2 nanohoneycomb

TiO2 nanohoneycomb was fabricated by solution-based nanosphere lithography. TiCl4 solution was used as a precursor to fill in the interspace of the self-assembled polystyrene nanosphere mask. After removing the polystyrene (PS) nanosphere monolayer by heating, an anatase nanohoneycomb was formed. A more uniform nanohoneycomb was obtained by using t-butanol as the solvent for TiCl4 because of its better wetting with the nanospheres. UV-visible spectra of the nanohoneycombs showed that there were two absorption edges at 320 and 470 nm. The photocatalytic activity measurement showed that the nanohoneycomb had a better photodecomposition efficiency than the film.