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Citation: Tianrong Li, Junxia Su, Fengjuan Chen, Hua Li, Jun Hai, Yongmin Liang, Baodui Wang. Synthesis of Carbon Dots and Its Application in Colorimetric Detection of Manganese Ions[J]. University Chemistry, ;2020, 35(12): 206-211. doi: 10.3866/PKU.DXHX201911003 shu

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

National Demonstration Center for Experimental Chemistry Education(Lanzhou University), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China

Corresponding author: Baodui Wang, wangbd@lzu.edu.cn
Received Date: 4 November 2019

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.
- Carbon dots,
- 3,3',5,5'-tetramethylbenzidine,
- Mn²⁺,
- Colorimetric detection
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