I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy复合光催化剂的制备及性能研究  

Preparation and photocatalysis properties of I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy composite photocatalyst

作　　者：陈加祥 张哲娟[1] 聂耳 宋也男 朴贤卿[1] 孙卓[1] CHEN Jiaxiang;ZHANG Zhejuan;NIE Er;SONG Yenan;PIAO Xianqing;SUN Zhuo(Engineering Research Center for Nanophotonics and Advanced Instrument(Ministry of Education),School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学物理与电子科学学院纳光电集成与先进装备教育部工程研究中心,上海200241

出　　处：《华东师范大学学报（自然科学版）》2022年第6期157-168,共12页Journal of East China Normal University(Natural Science)

基　　金：上海市科委项目(19DZ1205102,20DZ1202106)。

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-TiO_(2)/Sr_(2)MgSi_(2)O_(7):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-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy复合光催化剂中I-TiO_(2)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Sr_(2)MgSi_(2)O_(7):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.A I-TiO_(2)/Sr_(2)MgSi_(2)O_(7):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-TiO_(2)/Sr_(2)MgSi_(2)O_(7):Eu,Dy composite photocatalyst with a I-TiO_(2) 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 Sr_(2)MgSi_(2)O_(7):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-TiO_(2) in order to achieve 24-hour catalytic purification.

关 键 词：Sr_(2)MgSi_(2)O_(7):Eu DY I-TiO_(2) 光催化 长余辉光致发光材料 

分 类 号：O643.36[理学—物理化学]