摘要
开发了基于Dy_(2)O_(3)/La_(2)O_(3)稀土复合氧化物的高性能催化发光传感平台,用于1,2-环氧丙烷(PO)的特异性检测.通过优化调控稀土氧化物的组成比例,Dy_(2)O_(3)/La_(2)O_(3)异质界面产生了显著的协同催化效应,实现了对PO分子的高灵敏度与高选择性检测(LOD=82.8μmol/L,对PO的响应强度是干扰物的10倍以上).在最佳实验条件下(检测波长575 nm,检测温度360℃,气体流速320 mL/min),催化发光强度与PO浓度呈良好线性关系,线性方程为y=9701.25x+15085.19,检出限为8.28×10^(−5) mol/L,R2=0.9969.该传感系统具有良好的稳定性(11次循环测试RSD<3%),加标回收率为96%~108%.基于实验结果提出了“光激发-氧活化-选择性氧化-特征发光”的传感机制.本工作为开发新型稀土氧化物基传感材料提供了新策略,并为环境挥发性有机物(VOCs)的识别与传感提供了创新解决方案.
In this study,we developed a high-performance cataluminescence(CTL)sensing platform based on Dy_(2)O_(3)/La_(2)O_(3)rare-earth composite oxides for specific detection of 1,2-epoxypropane(PO).Through optimized compo⁃sition regulation of the rare-earth oxides,the Dy_(2)O_(3)/La_(2)O_(3)heterointerface demonstrated remarkable synergistic catalytic effects,achieving both high sensitivity(LOD=82.8μmol/L)and exceptional selectivity(10-fold higher response to PO than interferents).Under optimal conditions(detection wavelength:575 nm;temperature:360℃;gas flow rate:320 mL/min),the CTL intensity showed excellent linear correlation with PO concentration(y=701.25x+15085.19,R^(2)=0.9969),with an ultralow detection limit(8.28×10^(−5)mol/L).The sensing system exhibited outstanding stability(RSD<3%over 11 cycles)and satisfactory recovery rates(96-108%).A"photoexcitation-oxygen activationselective oxidation-characteristic luminescence"sensing mechanism was proposed.This work provides a novel strategy for developing rare-earth oxide-based sensing materials and offers an innovative solution for environmental VOC monitoring.
作者
张雨薇
杜一浩
张琰图
李云云
ZHANG Yuwei;DU Yihao;ZHANG Yantu;LI Yunyun(College of Chemistry and Chemical Engineering,Yan'an University,Yan’an,716000,China)
出处
《高等学校化学学报》
北大核心
2025年第8期9-16,共8页
Chemical Journal of Chinese Universities
基金
陕西省科技厅项目(批准号:2024JC-YBQN-0120)
延安大学博士科研启动项目(批准号:YAU202303811)
大学生创新创业训练计划项目(批准号:D2024247)
延安大学校级科研计划项目(批准号:YDQ2019-20)
国家自然科学基金(批准号:52063029)资助.
关键词
稀土复合氧化物
界面协同效应
环氧丙烷检测
催化发光传感器
气敏反应机理
Rare-earth composite oxides
Interfacial synergistic effect
Propylene oxide detection
Catalumines⁃cence sensor
Gas-sensing reaction mechanism
