Preparation and photocatalysis properties of I-TiO2/Sr2MgSi2O7:Eu,Dy composite photocatalyst

doi:10.3969/j.issn.1000-5641.2022.06.016

Abstract

Abstract:

A I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy composite photocatalyst was prepared via hydrolysis for efficient degradation of organic pollutants in the absence of light. In this paper, the photocatalytic degradation of Rhodamine B (RhB) by the composite photocatalyst was studied. The results show that the degradation ability of I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy composite photocatalyst with a I-TiO₂ ratio of 30% is better, and the degradation efficiency of RhB pollutants reached 31.9% in 6 h without a light source. These results indicate that a Sr₂MgSi₂O₇:Eu,Dy composite photocatalyst, supported by long afterglow phosphor, can absorb light energy and become a new light source in light-free or low-light environments for the photocatalytic reaction of I-TiO₂ in order to achieve 24-hour catalytic purification.

Key words: Sr₂MgSi₂O₇:Eu, Dy, I-TiO₂, photocatalytic, long-afterglow luminescence

CLC Number:

O643.36

Jiaxiang CHEN, Zhejuan ZHANG, Er NIE, Yenan SONG, Xianqing PIAO, Zhuo SUN. Preparation and photocatalysis properties of I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy composite photocatalyst[J]. Journal of East China Normal University(Natural Science), 2022, 2022(6): 157-168.

Figures/Tables 12

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Preparation and photocatalysis properties of I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy composite photocatalyst

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