大学化学 >> 2020, Vol. 35 >> Issue (12): 206-211.doi: 10.3866/PKU.DXHX201911003

化学实验 上一篇    下一篇

碳点的合成及对锰离子的比色检测——推荐一个大学化学综合实验

李天荣, 苏军霞, 陈凤娟, 李华, 海军, 梁永民, 汪宝堆()   

  • 收稿日期:2019-11-04 录用日期:2019-11-28 发布日期:2019-12-10
  • 通讯作者: 汪宝堆 E-mail:wangbd@lzu.edu.cn
  • 作者简介:汪宝堆, Email: wangbd@lzu.edu.cn

Synthesis of Carbon Dots and Its Application in Colorimetric Detection of Manganese Ions

Tianrong Li, Junxia Su, Fengjuan Chen, Hua Li, Jun Hai, Yongmin Liang, Baodui Wang()   

  • Received:2019-11-04 Accepted:2019-11-28 Published:2019-12-10
  • Contact: Baodui Wang E-mail:wangbd@lzu.edu.cn

摘要:

本实验以柠檬酸为原料使用水热法制备了碳点;利用Mn2+对碳点和3,3',5,5'-四甲基联苯胺(TMB)混合体系中TMB的催化氧化变色,实现了对Mn2+的比色检测;利用紫外-可见吸收光谱研究了检测的选择性和灵敏度。本实验涵盖了纳米材料的制备、表征和分析检测等方面的内容,不仅锻炼了学生对知识和实验技能的综合运用能力,而且利于开阔学生的学术视野。

关键词: 碳点, 3, 3', 5, 5'-四甲基联苯胺, 锰离子, 比色检测

Abstract:

In this experiment, carbon dots were prepared by hydrothermal method with citric acid as raw material. The colorimetric detection of Mn2+ was realized via the catalytic oxidation discoloration of Mn2+ to 3, 3', 5, 5'-tetramethylbenzidine (TMB) in the mixed system of carbon dots and TMB. Selectivity and sensitivity of the detection were studied by UV-Vis absorption spectrum. This comprehensive experiment covers the preparation and characterization of nanomaterials and the analysis and detection to important substances. It not only exercises students' comprehensive ability to use knowledge and experimental skills, but also helps to broaden students' academic vision.

Key words: Carbon dots, 3, 3', 5, 5'-tetramethylbenzidine, Mn2+, Colorimetric detection

MSC2000: 

  • G64