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  

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

作　　者：李天荣 苏军霞 陈凤娟[1] 李华[1] 海军 梁永民[1] 汪宝堆[1] Tianrong Li;Junxia Su;Fengjuan Chen;Hua Li;Jun Hai;Yongmin Liang;Baodui Wang(National Demonstration Center for Experimental Chemistry Education(Lanzhou University),College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,P.R.China)

机构地区：[1]兰州大学化学化工学院,化学国家级实验教学示范中心(兰州大学),兰州730000

出　　处：《大学化学》2020年第12期206-211,共6页University Chemistry

摘　　要：本实验以柠檬酸为原料使用水热法制备了碳点;利用Mn^(2+)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Mn^(2+)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。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.

关 键 词：碳点 3 3’ 5 5’-四甲基联苯胺 锰离子 比色检测 

分 类 号：G64[文化科学—高等教育学] O6[文化科学—教育学]