摘要
采用L-酪氨酸、金、多壁碳纳米管对玻碳电极进行修饰,考察直接混合滴涂法修饰、部分混合滴涂结合电化学法、逐一修饰法修饰的影响,最终确定采用逐一修饰法,即先采用循环伏安法在GCE表面聚合L-Tyr,恒电流沉积法在L-Tyr/GCE表面沉积Au,最后滴涂MWCNTs,制备得到MWCNTs/Au/L-Tyr/GCE电极。对L-Tyr聚合条件进行优化,并将修饰电极置于柠檬黄溶液中进行测试,结果表明在9.0×10^(-7)~5×10^(-5) mol·L^(-1)范围内峰电流与其浓度呈线性关系,线性方程为I(μA)=0.4904c(μmol/L)-2.304,线性相关系数R^(2)=0.9923,最低检出限为2.1×10^(-7) mol·L^(-1)。
The glassy carbon electrode was modified with L-tyrosine,gold,and multi-walled carbon nanotubes.The effects of direct mixed modification,partial mixed drip coating combined with electrochemical deposition method,and one-by-one modification were investigated.The one-by-one modification method was adopted to prepare MWCNTs/Au/L-Tyr/GCE electrode.The L-Tyr was polymerized on the surface of GCE by cyclic voltammetry,Au was deposited on L-Tyr/GCE surface by constant current deposition,and the MWCNTs were deposited on Au/L-Tyr/GCE surface by drop coating method.The polymerization conditions of L-Tyr and the modified electrode test conditions were optimized,and the modified electrode was tested in lemon yellow solution,the results showed in the range of 9.0×10^(-7)~5×10^(-5) mol·L^(-1),the current and its concentration showed a linear trend.The linear equation was I(μA)=0.4904c(μmol/L)-2.304,the linear phase relationship R^(2)=0.9923,and the minimum detection limit was 2.1×10^(-7) mol·L^(-1).
作者
林素英
陈宇
谢丽燕
苏知枭
Lin Suying;Chen Yu;Xie Liyan;Su Zhixiao(College of Environmental and Biological Engineering,Putian University,Putian 351100;Fujian Provincal Key Laboratory of Ecology-toxicological Effects&Control for Emerging Contaminants,Putian University,Putian 351100,China)
出处
《广东化工》
CAS
2021年第21期151-154,共4页
Guangdong Chemical Industry
基金
福建省莆田市科技计划项目(2018NP2001)
福建省大学生创新创业项目(S202011498030)。
