Optical properties of nanoporous glass filled with TiO2 nanostructures

Titanium dioxide nanoparticles (NP) and nanofibers (NF) were incorporated from polymeric gels into porous glasses. Two types of glasses A and B with different porosity were chosen for measurements. Optical absorbance and photoluminescence spectra of the samples were measured at the range of 200-1100 nm and 370-800 nm correspondently before and after TiO2 incorporation. The enhancement of TiO2 photoluminescence (PL) and short-wave shift of peaks for samples A and B was found. The obtained results are explained by quantum confinement effects.