Reusable Cubic Porous Sr ₂MgSi ₂O ₇:Eu ²⁺, Dy ³⁺/Ag ₃PO ₄ Composite Device with Adsorption-Photocatalysis Effects for Dark Degradation

Abstract

Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺(SMSED) is a common persistent luminescence phosphors(PLPS) with excellent performance. In this work, the cubic SMSED phosphor with porous structure was prepared by employing a template-assisted high temperature solid-phase(THT) method. THT method can lower the calcination temperature, improved the performance, and form a good pore structure. This is conducive to the subsequent recombination with the photocatalyst. Then Ag₃PO₄(APO) is compounded in situ in the pore structure of SMSED PLPS. And the cubic porous SMSED/APO composite device possesses an obvious catalytic function regardless of the presence of light or not. The good adsorption of porous materials and photocatalysis can synergistically adsorb organic pollutants to obtain faster degradation efficiency. Moreover, the SMSED PLPS with porous structure can be reused, reducing secondary pollution. This work will help reduce the energy consumption of industrial production of PLPS and promote the further application of photocatalytic technology.

Keywords: SMSED/APO, THT method, pore structure, adsorption-photocatalysis effects