应用化学 ›› 2022, Vol. 39 ›› Issue (9): 1382-1390.DOI: 10.19894/j.issn.1000-0518.210369

• 研究论文 • 上一篇    下一篇

氮硫共掺杂碳点的制备及其对牛奶中土霉素的检测

杨振华, 孙宣森, 张月霞, 曹宇娟, 张琪琦, 郭峤志, 范小鹏, 李忠平, 董川()   

  1. 山西大学环境科学研究所,太原 030006
  • 收稿日期:2021-07-27 接受日期:2022-02-23 出版日期:2022-09-01 发布日期:2022-09-08
  • 通讯作者: 董川
  • 基金资助:
    国家自然科学基金(91843301);山西省留学基金(2020-002)

Preparation of Nitrogen Sulfur Co⁃doped Carbon Dots with Nitrogen Sulfur and the Application for Detection of Oxytetracycline in Milk

Zhen-Hua YANG, Xuan-Sen SUN, Yue-Xia ZHANG, Yu-Juan CAO, Qi-Qi ZHANG, Qiao-Zhi GUO, Xiao-Peng FAN, Zhong-Ping LI, Chuan DONG()   

  1. Institute of Environmental Science,Shanxi University,Taiyuan 030006,China
  • Received:2021-07-27 Accepted:2022-02-23 Published:2022-09-01 Online:2022-09-08
  • Contact: Chuan DONG
  • About author:dc@sxu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(91843301);the Scholarship Fund of Shanxi Province(2020?002)

摘要:

以柠檬酸和谷胱甘肽为原材料,通过热解法一步合成一种氮硫共掺杂蓝色荧光碳点(N,S-CDs)。使用透射电子显微镜(TEM)、紫外-可见吸收光谱、荧光光谱、X射线光电子能谱等技术对制备的碳点进行形貌及光学性质表征。结果表明,该碳点的激发波长和发射波长分别为366和440 nm,荧光产率为0.46,平均粒径为(2.55 ± 0.75) nm。土霉素可有效猝灭该碳点的蓝色荧光,且具有良好的选择性。将该碳点用于牛奶中土霉素的检测时,在0.77~18.40 μg/mL的范围内,(F0-F)/F0与土霉素浓度有良好的线性关系,回归方程为y=0.02282x+0.02913,检出限为0.09 μg/mL。该检测方法具有简单易操作的优点。

关键词: 柠檬酸热解法, 谷胱甘肽, 碳点, 土霉素

Abstract:

A nitrogen sulfur co-doped fluorescent carbon dot (N,S-CDs) is synthesized by pyrolysis from citric acid and glutathione as starting materials. The morphology and properties of synthesized N,S-CDs are characterized by transition electron microscopy(TEM), UV-Vis absorption, fluorescence spectroscopy, and X-ray photoelectron spectroscopy(XPS). The N,S-CDs has an average particle size of (2.55 ± 0.75) nm, and is also highly fluorescent at about 440 nm with excitation at 360 nm, respectively, and a relative fluorescence quantum yield as 0.46. The presence of oxytetracycline can effectively quench the fluorescence of N,S-CDs with a good selectivity. The N,S-CDs is applied for the detection of oxytetracycline in milk, and the linear relationship is found in the range of 0.77~18.40 μg/mL, with the detection limit as 0.09 μg/mL. And the regression equation is y=0.02282x+0.02913. The preparation is straightforward and the detection of oxytetracycline is also less complicated.

Key words: Pyrolysis of citric acid, Glutathione, Carbon dots, Oxytetracycline

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