无机材料学报2025，Vol.40Issue(5)：481-488,中插3-中插4,10.DOI:10.15541/jim20240495
基于富氧空位LiYScGeO4:Bi3+长余辉光催化剂的自激活余辉驱动有机污染物芬顿降解
Organic Pollutant Fenton Degradation Driven by Self-activated Afterglow from Oxygen-vacancy-rich LiYScGeO4:Bi3+Long Afterglow Phosphor
摘要
Abstract
Self-activated long afterglow photocatalysts show great potential for all-weather wastewater treatment,with sustained photocatalytic activity even under dark conditions.However,the radiative combination of afterglow luminescence and photocatalytic degradation reaction has competitive utilization for photogenerated carriers,reducing afterglow duration and generating excessive hole accumulation,which significantly limits the efficiency of long afterglow driven photocatalytic degradation.Here,a long afterglow photocatalyst LiYGeO4:Bi3 based on oxygen vacancy(VO)was prepared,which released ultraviolet afterglow after activation by ultraviolet light irradiation and degraded organic pollutants via photocatalytic degradation driven by its own afterglow in dark condition.The trap concentration was improved by engineering oxygen vacancies and crystal fields,significantly enhancing the afterglow duration and intensity of VO-LiYScGeO4:Bi3+.A Fenton reaction system was constructed to further increase the concentration of active species,which maximized the photocatalytic degradation efficiency of VO-LiYScGeO4:Bi3+during the afterglow duration.After 10 min UV irradiation to activate VO-LiYScGeO4:Bi3+continuously released ultraviolet afterglow for photocatalytic degradation of Rhodamine B(RhB),reaching a degradation efficiency of 63%within 1 h in Fenton environment,which increased by 3.5 folds when compared to that of LiYScGeO4:Bi3+in the initial environment.This work provides a new approach for the design of afterglow photocatalysts and their application in wastewater treatment.关键词
光催化/光芬顿/氧空位/长余辉/荧光粉Key words
photocatalysis/photo-Fenton/oxygen vacancy/long afterglow/phosphor分类
化学引用本文复制引用
范小暄,郑永炅,徐丽荣,姚子敏,曹硕,王可心,王绩伟..基于富氧空位LiYScGeO4:Bi3+长余辉光催化剂的自激活余辉驱动有机污染物芬顿降解[J].无机材料学报,2025,40(5):481-488,中插3-中插4,10.基金项目
国家自然科学基金(12374181) （12374181）
辽宁省属本科高校基本科研业务费专项资金(LJ212410140035) （LJ212410140035）
沈阳市自然科学基金(基础研究)专项项目(22-315-6-06) （基础研究）
辽宁大学青年科研基金(LDYBJC2401)National Natural Science Foundation of China(12374181) （LDYBJC2401）
Fundamental Research Funds for Public Universities in Liaoning(LJ212410140035) （LJ212410140035）
Natural Science Foundation of Shenyang(22-315-6-06) （22-315-6-06）
Youth Research Fund in Liaoning University(LDYBJC2401) （LDYBJC2401）
