回流法合成氮掺杂碳点用于荧光检测Cr^(6+)离子  

High-efficiency Synthesized Nitrogen Doped Carbon Dots and Used for Fluorescence Detection of Cr^(6+)

作　　者：张汉强[1] 张著森[1] 胡志彪[1] 

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364000

出　　处：《广东化工》2017年第21期40-42,共3页Guangdong Chemical Industry

摘　　要：以柠檬酸和尿素为碳源和氮源,通过一步回流法合成氮掺杂碳点(N-CDs),该N-CDs表面含有羟基和氨基,并且具有强烈的荧光性能。该N-CDs显示出激发波长不依赖发射波长的行为,最佳激发波长为290 nm。Cr^(6+)能够有效猝灭N-CDs的荧光,且N-CDs对Cr^(6+)具有良好的选择性。另外,在Cr^(6+)的浓度为0~8μM的范围内,N-CDs的荧光变化值与Cr^(6+)的浓度呈线性关系。In this paper, the citric acid and urea as carbon source and nitrogen source were used to one step synthesis nitrogen doped carbon dots （N-CDs） via reflux method. The obtained N-CDs were containing hydroxyl and amino functional groups. The N-CDs exhibited an intense emission peak at the 290 nm and possess intense fluorescence and excitation wavelength independent emission wavelength. The fluorescence of the N-CDs can be quenched by Cr^6＋ The N-CDs possess good selectivity for Cr^6＋. In, addition, the N-CDs exhibited a wide linear response concentration range （1-8 μM） to Cr^6＋.

关 键 词：氮掺杂 碳点 回流法 荧光 CR^6+ 检测 

分 类 号：O657.39[理学—分析化学] O613.71[理学—化学]