【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。更多还原

【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.更多还原