石墨烯量子点功能化多壁碳纳米管构建日落黄和酒食黄同时检测的电化学传感器  

Determination of Sunset Yellow and Tartrazine in Drinks by an Electrochemical Sensor Based on the Composite of Graphene Quantum Dots/Multi-walled Carbon Nanotubes

作　　者：徐利斌[1] 尹争志[2] 曾延波[2] 李蕾[1,2] 

机构地区：[1]常州大学石油化工学院食品学院,江苏常州213016 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314001

出　　处：《分析科学学报》2015年第4期455-459,共5页Journal of Analytical Science

基　　金：浙江省自然科学基金(No.LQ12B05005);浙江省公益性技术应用研究计划(No.2013C32038)

摘　　要：通过静电作用，成功将石墨烯量子点（GQDs）复合到多壁碳纳米管（MWNTs）表面，制得石墨烯量子点-多壁碳纳米管复合物（GQDs-MWNTs），并对其进行了扫描电镜、紫外-可见吸收光谱表征。相对于单独的MWNTs修饰玻碳电极（MWNTs／GCE），GQDs-MWNTs／GCE表现出更好的导电性，以及对日落黄和酒食黄显著的电催化性能，这两者的峰电位差达到230mV；检测日落黄和酒食黄的线性范围分别为30～230ng·mL^-1和40～600ng·mL^-1，检测限分别为4．05ng·mL^-1和8．06ng·mL^-1。研究了日落黄和酒食黄的电化学行为和机理，并用于饮料中两物质的分析测定。Graphene quantum dots（GQDs）were successfully combined on the surface of multi-walled carbon nanotubes（MWNTs）through electrostatic interaction,and the obtained composite of GQDsMWNTs was characterized by scanning electron microscope（SEM）and ultraviolet spectrum.The composite modified electrode showed better electroconductivity than that of MWNTs modified electrode.And the modified electrode had significant catalysis for sunset yellow and tartrazine,with the peak potential difference of 230 mV for eliminating the interference of coexisting species.The linear range for detecting sunset yellow and tartrazine were 30-230ng·mL-1 and 40-600ng·mL-1,respectively,and the detection limits were 4.05ng·mL-1 and 8.06ng·mL-1.The electrochemical behavior and mechanism of two kinds of pigment were studied.The sensor has been used for determination of supermarket drinks,indicating its potential value in application for the sensitive and simultaneous detection of sunset yellow and tartrazine.

关 键 词：石墨烯量子点 多壁碳纳米管 日落黄 酒食黄 电化学传感器 

分 类 号：O657.1[理学—分析化学]