基于还原氧化石墨烯和乙炔炭黑的新型电化学传感器灵敏测定食品色素日落黄  

A Novel Electrochemical Sensor Based on Reduced Graphene Oxide and Acetylene Black for Sensitive Detection of Food Colorant Sunset Yellow

作　　者：邓培红 王淳之 唐清 曾珺 朱青青 舒晶 DENG Pei-hong;WANG Chun-zhi;TANG Qing;ZHENG Jun;ZHU Qing-qing;SU Jing(College of Chemistry and Materials Science,Hengyang Normal University,Hengyang Hunan 421008,China;Hengyang Eighth Middle School,Hengyang Hunan 421008,China;Hengyang Chengzhang Experimental Middle School,Hengyang Hunan 421008,China)

机构地区：[1]衡阳师范学院化学与材料科学学院,湖南衡阳421008 [2]衡阳市第八中学,湖南衡阳421001 [3]衡阳市成章实验中学,湖南衡阳421007

出　　处：《衡阳师范学院学报》2020年第3期70-75,共6页Journal of Hengyang Normal University

基　　金：湖南省自然科学基金项目(2016JJ4010);“功能金属有机材料”湖南省普通高等学校重点实验室开放基金项目(GN19K05)。

摘　　要：采用可控的恒电位还原法制备了电化学还原氧化石墨烯修饰乙炔炭黑糊电极(简称ERGO/ABPE)。用扫描电子显微镜(SEM)和循环伏安法(CV)对其进行了表征。与传统碳糊电极(CPE)相比,在ERGO/ABPE上观察到一个峰形良好的日落黄(SY)氧化峰,这是由于电极表面的电化学还原氧化石墨烯具有良好的电催化活性和乙炔炭黑具有良好的导电性和吸附性所致。详细优化了SY检测的实验参数。在最佳的实验条件下,采用二阶导数线性扫描伏安法,ERGO/ABPE对SY浓度在4.0×10^-8~2.0×10^-6mol/L和2.0×10^-6~1.0×10^-5mol/L范围内具有良好的线性响应,检测限为1.0×10^-8mol/L (S/N=3)。该方法用于软饮料中SY的检测,结果满意。In this work,an acetylene black paste electrode modified with electrochemical reduced graphene oxide(denoted as ERGO/ABPE)was constructed using controlled potential reduction method.The characterization was performed by scanning electron microscopy(SEM)and cyclic voltammetry(CV).Compared with the poor voltammetric response at conventional carbon paste electrode(CPE),a well-defined oxidation peak of sunset yellow(SY)was observed at the ERGO/ABPE,which was attributed to the excellent electro catalytic activity of ERGO and good conductivity and adsorb ability of AB on the electrode surface.The experimental parameters for SY detection were optimized in detail.Under the optimized experiment conditions and using the second-order derivative linear sweep voltam-metry,the ERGO/ABPE showed good linear response to SY concentration in range of 4.0×10^-8~2.0×10^-6 mol/L and 2.0×10^-6~1.0×10^-5 mol/L with a detection limit of 1.0×10^-8 mol/L(S/N=3).This developed method was applied for SY detection in soft drinks with satisfied detected results.

关 键 词：日落黄 还原氧化石墨烯 可控电位还原 伏安测定 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]