Preparation and catalytic activity research of the Sr2MgSi2O7:Eu2+, Dy3+/TiO2 composite catalyst

Abstract

In order to make TiO 2 with photocatalytic ability in dark environment, TiO 2 -coated Sr 2 MgSi 2 O 7 :Eu 2? , Dy 3? phosphor (TB particles) with different ratios were successfully designed and synthesized. It was found that sample TB2 had the best catalytic activity under light irradiation; when without light irradiation, the optimum catalytic property appeared in sample TB4. It was proposed that the catalytic performance was driven by two factors: the electrons transportation as well as light transfer between the phosphors and TiO 2 particles.