应用化学 ›› 2023, Vol. 40 ›› Issue (11): 1550-1557.DOI: 10.19894/j.issn.1000-0518.230166

• 研究论文 • 上一篇    下一篇

基于氮化碳量子点/罗丹明B系统检测汞离子的比率荧光探针

周叶红1, 张旭艺1, 芦冬涛1, 徐会文2, 刘洋1(), 董川1()   

  1. 1.山西大学环境科学研究所,太原 030006
    2.太原重工轨道交通设备有限公司,太原 030032
  • 收稿日期:2023-06-05 接受日期:2023-10-05 出版日期:2023-11-01 发布日期:2023-12-01
  • 通讯作者: 刘洋,董川
  • 基金资助:
    国家自然科学基金(22274090)

Ratio Fluorescence Sensor Based on Carbon Nitride Quantum Dots/Rhodamine B System for Mercury Ion Detection

Ye-Hong ZHOU1, Xu-Yi ZHANG1, Dong-Tao LU1, Hui-Wen XU2, Yang LIU1(), Chuan DONG1()   

  1. 1.Institute for Environmental Science,Shanxi University,Taiyuan 030006,China
    2.Taiyuan Heavy Industry Rail Transit Equipment Company Limited,Taiyuan 030032,China
  • Received:2023-06-05 Accepted:2023-10-05 Published:2023-11-01 Online:2023-12-01
  • Contact: Yang LIU,Chuan DONG
  • About author:DC@sxu.edu.cn
    4747@sxu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22274090)

摘要:

通过一步水热法,以柠檬酸和尿素为原料,制备了蓝色氮化碳量子点(CNQDs),并对CNQDs的粒径分布、元素组成、形貌结构及表面官能团进行了表征,考察了CNQDs的光谱性质。以CNQDs为母体与罗丹明B(RhB)构成比率荧光探针CNQDs/RhB,基于CNQDs/RhB(447 nm/581 nm)的荧光强度比值F0=(F447/F581)的变化情况对汞离子(Hg2+)进行定量测定,具有高选择性和灵敏性。结果显示,该探针对Hg2+的检测线性范围为2~40 μmol/L,检出限为1.95 μmol/L。常见的阴离子和阳离子对CNQDs/RhB检测Hg2+基本无影响,并对该比率型荧光探针的检测机制进行了探究。最后,将该探针应用于实际水样中Hg2+的检测,说明该探针具有潜在的应用价值。通过研究,对Hg2+的检测提供了新的思路,也预示了该荧光探针在水环境检测方面具有广阔的应用前景。

关键词: 荧光探针, 碳量子点, Hg2+, 环境检测

Abstract:

Blue carbon nitride quantum dots (CNQDs) have been prepared from citric acid and urea by one-step hydrothermal method, characterized for morphology, elemental composition, surface functional groups, and particle size distribution. The photophysics of CNQDs is also investigated for the fluorescent sensing of Hg2+ by coupling with rhodamine B (RhB). CNQDs/RhB could sense Hg2+ with high sensitivity and selectivity from the intensity ratio of F447/F581. The sensing linear range is from 2.0 to 40 μmol/L, with the detection limit as 1.95 μmol/L. The common anions and cations do not interfere the detection of Hg2+ by CNQDs/RhB. The sensor has been applied for the detection of Hg2 + in real water samples, suggesting a great application potential.

Key words: Fluorescent sensor, Carbon dots, Hg2+, Environmental monitoring

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