【摘要】 以柠檬酸为碳源,丙三醇为反应溶剂和微波吸收介质,通过微波辅助法一步合成了荧光碳点.该方法快速、环保,合成的碳点尺寸均一、分散性好.利用透射电子显微镜、荧光光谱、紫外光谱、红外光谱和X射线光电子能谱对所合成碳点的结构和性质进行了表征.基于三价铁离子能够选择性地猝灭碳点荧光的特性,建立了基于碳点检测实际水样品中Fe³⁺的方法.该方法线性范围为5～50μmol/L,检出限为2.16μmol/L,在加标样品中Fe³⁺的加标回收率为96.8%～106.0%.更多还原

【Abstract】 Carbon dots（ CDs） were synthesized through one-pot microwave-assisted synthesis method using citric acid as carbon source,glycerol as solvent and passivation agent. The obtained CDs have uniform size and good dispersion. The proposed synthesis method is rapid,simple and eco-friendly. The CDs were applied to detecting Fe³⁺ in practical water samples based on fluorescence（ FL） quenching mechanism with a linear range of 5—50 μmol/L,a detection limit of 2. 16 μmol/L and the recoveries of 96. 8%—106. 0%,which showed good feasibility in detection of Fe³⁺ in practical water samples.更多还原