摘要
制备了壳聚糖-碳纳米管修饰玻碳电极(CHIT-MWCNTs/GCE)、二茂铁修饰玻碳电极(Fc/GCE)两种修饰玻碳电极,结果表明,制备的修饰玻碳电极对抗坏血酸(AA)的氧化有明显电催化作用。用CHIT-MWCNTs/GCE、Fc/GCE两种电极来检测水中AA浓度,利用循环伏安CV曲线分析电流和电位的变化得到AA在修饰玻碳电极上的电化学行为。结果表明,p H=5.97,磷酸缓冲溶液(PBS)浓度为50 mmol/L的支持电解质溶液下,制备的修饰玻碳电极有效检测AA的浓度范围为0.1~10 mmol/L,检出限为0.01 mmol/L。扫描速度与峰电流呈良好的线性相关关系y=-0.080 31X-1.994 53,r=-0.99,表明该反应机理受吸附控制。
Two kinds of modified glassy carbon electrodes were prepareed： Chitosan-Carbon Nanotube Modified Glassy Carbon Electrode（ CHIT-MWCNTs/GCE） and Ferrocene modified glassy carbon electrode（ Fc/GCE）. Results show that the modified glassy carbon electrodes have obvious electrocatalytic activity for oxidation of ascorbic acid（ AA）. Test is mainly used two kinds of electrodes to detect AA： CHITMWCNTs/GCE and Fc/GCE,according to cyclic voltammetry method to analyse the current and potential changes to give AA electrochemical behavior of the electrodes. Result show that the supporting electrolyte solution contain p H = 5. 97,the PBS concentration is 50 mmol/L,the effective detection range of concentrations of ascorbic acid is 0. 1 ~ 10 mmol/L. The detection limit is 0. 01 mmol/L. Scanning speed and peak current showed a good linear relationship： y =-0. 080 31 X-1. 994 53,r =-0. 99. This indicates that the reaction is controlled by adsorption. This method is a reliable,fast and sensitive detection method,it can be used for the determination of the AA.
作者
陈少华
周健康
丁益
赵东林
吴世彪
陈建利
CHEN Shao-hua;ZHOU Jian-kang;DING Yi;ZHAO Dong-lin;WU Shi-biao;CHEN Jian-li(School of Material and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Key Laboratory of Advanced Building Materials,Anhui Jianzhu University,Hefei 230601,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第7期1452-1456,共5页
Applied Chemical Industry
基金
安徽高校省级自然科学研究重点项目(KJ2015A340)
国家级大学生创新计划(201610878054)
关键词
壳聚糖
二茂铁
碳纳米管
抗坏血酸
玻碳电极
chitosan
ferrocene
carbon nanotubes
ascorbic acid
glassy carbon electrode
