高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (8): 20250108.doi: 10.7503/cjcu20250108

• 分析化学 • 上一篇    下一篇

Dy2O3/La2O3稀土复合氧化物催化发光传感1,2-环氧丙烷

张雨薇, 杜一浩, 张琰图, 李云云()   

  1. 延安大学化学与化工学院,延安 716000
  • 收稿日期:2025-04-11 出版日期:2025-08-10 发布日期:2025-06-03
  • 通讯作者: 李云云 E-mail:liyun233@126.com
  • 基金资助:
    陕西省科技厅项目(2024JC-YBQN-0120);延安大学博士科研启动项目(YAU202303811);大学生创新创业训练计划项目(D2024247);延安大学校级科研计划项目(YDQ2019-20);国家自然科学基金(52063029)

Cataluminescent Sensing of 1,2-Epoxypropane Using Dy₂O₃/La₂O₃ Rare Earth Composite Oxides

ZHANG Yuwei, DU Yihao, ZHANG Yantu, LI Yunyun()   

  1. College of Chemistry and Chemical Engineering,Yan'an University,Yan’an,716000,China
  • Received:2025-04-11 Online:2025-08-10 Published:2025-06-03
  • Contact: LI Yunyun E-mail:liyun233@126.com
  • Supported by:
    the Project of the Department of Science and Technology of Shannxi Province, China(2024JC-YBQN-0120);the Doctoral Research Initiation Project of Yan’an University, China(YAU202303811);the College Student Innovation and Entrepreneurship Training Program Project of Yan’an University, China(D2024247);the Yan’an University Campus level Scientific Research Program Project of Yan’an University, China(YDQ22019-20);the National Natural Science Foundation of China(52063029)

摘要:

开发了基于Dy₂O₃/La₂O₃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, Dy₂O₃/La₂O₃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=82.8 μmol/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.

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

Abstract:

In this study, we developed a high-performance cataluminescence(CTL) sensing platform based on Dy₂O₃/La₂O₃ rare-earth composite oxides for specific detection of 1,2-epoxypropane(PO). Through optimized composition regulation of the rare-earth oxides, the Dy₂O₃/La₂O₃ heterointerface demonstrated remarkable synergistic catalytic effects, achieving both high sensitivity(LOD=82.8 μmol/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, R²=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 activation-selective 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.

Key words: Rare-earth composite oxides, Interfacial synergistic effect, Propylene oxide detection, Cataluminescence sensor, Gas-sensing reaction mechanism

中图分类号: 

TrendMD: