羧基化碳纳米管-DMF-纳米金修饰电极测定尿酸  

Determination of Uric Acid by c-MWCNT/DMF/AuNPs Modified Electrode

作　　者：樊雪梅 刘萍 张舒淇 FAN Xue-mei;LIU Ping;ZHANG Shu-qi(College of Chemical Engineering and Modern Materials/Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,Shaanxi)

机构地区：[1]商洛学院化学工程与现代材料学院/陕西省尾矿资源综合利用重点实验室,陕西商洛726000

出　　处：《商洛学院学报》2023年第4期54-58,共5页Journal of Shangluo University

基　　金：国家大学生创新创业训练计划项目(S202111396023)。

摘　　要：通过循环伏安法研究了羧基化碳纳米管修饰电极对尿酸的电化学催化作用,将c-MWCNT/DMF/AuNPs固定于玻碳电极研究尿酸的电化学性质,建立了循环伏安法测定尿酸的检测方法。结果表明,修饰电极对尿酸的氧化有明显的催化作用,c-MWCNT/DMF/AuNPs固定的玻碳电极的循环伏安曲线在0.19 V和0.22 V出现一对氧化还原峰,与其在裸玻碳电极上的电化学行为相比,氧化峰峰电流显著增加,表明碳纳米管和纳米金产生协同增效作用。在最优试验条件下,峰电流与尿酸浓度在1.98×10^(-7)~1.18×10^(-4)mol/L呈良好线性关系,检出限为1.4×10^(-8)mol/L。The electrochemical catalytic effect of carboxylated carbon nanotubes modified electrode on uric acid was studied by cyclic voltammetry.The electrochemical properties of uric acid were studied by fixing c-MWCNT/DMF/AuNPs solution on glassy carbon electrode.A cyclic voltammetry method was established for the determination of uric acid.The results showed that the modified electrode had an obvious catalytic effect on the oxidation of uric acid.The cyclic voltammetric curve of c-MWCNT/DMF/AuNPs fixed glassy carbon electrode had a pair of REDOX peaks at 0.19 V and 0.22 V.Compared with the electrochemical behavior on the bare glassy carbon electrode,the oxidation peak current increases significantly.The results showed that carbon nanotubes and gold nanoparticles have synergistic effect.Under the optimal experimental conditions,there was a good linear relationship between the peak current and uric acid concentration in 1.98×10^(-7)~1.18×10^(-4)mol/L,and the detection limit was 1.4×10^(-8)mol/L.

关 键 词：循环伏安法 羧基化碳纳米管 尿酸 

分 类 号：O657.1[理学—分析化学]