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

In order to make TiO₂ with photocatalytic ability in dark environment, TiO₂-coated Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ 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 TiO₂ particles.