(657b) Facile Synthesis and Photocatalytic Properties of TiO2 Nanoparticles Supported On Porous Glass Beads

This work presents a novel immobilization method for the preparation of highly dispersed TiO₂ nanoparticles supported on porous glass beads. Mono-dispersed TiO₂ nanoparticles exhibiting the anatase phase were obtained by the combination of an in-situ ion exchange process and a calcination process. The mean diameter and the loading amount of TiO₂ were controllable in this green way. With the increase of loading amount of Ti from 0.08 wt.% to 4.55 wt.%, the mean diameter of the TiO₂ nanoparticles varied from 3.8 to 5.3 nm. And the band gaps of the TiO₂ nanoparticles with the highest and lowest loading amount are 3.25 and 3.00 eV, respectively. The prepared TiO₂ nanoparticles supported on porous glass beads showed excellent photocatalytic performance for the degradation of methyl orange (MO). For the catalyst with a Ti content of 0.08 wt.%, when the dosage was 1.93 e-5 g/mL, 65% of the total MO decomposed after 30 min; for the catalyst with a Ti content of 2.56 wt.%, when the dosage reached 0.81 e-3 g/mL, complete degradation was observed.