I-TiO2/Sr2MgSi2O7:Eu,Dy复合光催化剂的制备及性能研究

doi:10.3969/j.issn.1000-5641.2022.06.016

摘要/Abstract

摘要：

为了实现在无光或弱光环境下对有机污染物的降解, 采用水解法制备了I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy复合光催化剂, 并以罗丹明B (Rhodamine B, RhB) 为目标污染物, 进行了光催化降解实验. 结果表明, 当I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy复合光催化剂中I-TiO₂的质量百分比为30%时, 降解率最高: 在可见光照射下, 3 h内对RhB污染物的降解率达到19.2%; 其在无光源环境下, 6 h内对RhB污染物的降解率达到31.9%. 实验证明, 以Sr₂MgSi₂O₇:Eu,Dy长余辉荧光粉为载体的新型复合光催化剂, 在光照下吸收的光能, 成为无光或弱光环境下的新发光源, 实现可见光复合光催化剂的无光催化, 最终达到全天候24 h催化净化的应用目标.

关键词: Sr₂MgSi₂O₇:Eu, Dy, I-TiO₂, 光催化, 长余辉光致发光材料

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

中图分类号:

O643.36

陈加祥, 张哲娟, 聂耳, 宋也男, 朴贤卿, 孙卓. I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy复合光催化剂的制备及性能研究[J]. 华东师范大学学报（自然科学版）, 2022, 2022(6): 157-168.

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.

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I-TiO₂/Sr₂MgSi₂O₇:Eu,Dy复合光催化剂的制备及性能研究

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

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