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在金纳米粒子(AuNPs)上经苯硫酚衍生物(3,4二羟基苯基-偶氮-苯硫酚,DAT)自组装制得了一种新型纳米复合物,用于修饰玻璃碳电极(GCE/AuNP-DAT).采用循环伏安法研究了该新型电极的性质,并将其用作异丙肾上腺素(IP)电催化剂,考察了该纳米复合物的电催化活性,从而得到反应机理和催化反应速率常数.由于GCE/Au NP-DAT电极对尿酸氧化没有电催化活性,因此可将IP的氧化信号从该改进电极中分离出来,从而排除了尿酸对IP测定的干扰.该电极可作为传感器,当用于差动脉冲伏安法测定IP时,线性动态范围为1.0–1500.0μmol/L,检测极限为0.46μmol/L.
A new nanocomposite was prepared by self-assembly of thiophenol derivatives (3,4-dihydroxyphenyl-azo-thiophenol, DAT) on gold nanoparticles (AuNPs) for the modification of glassy carbon electrodes GCE / AuNP-DAT). The properties of the new electrode were studied by cyclic voltammetry and used as isoprenaline (IP) electrocatalyst. The electrocatalytic activity of the nanocomposite was investigated and the reaction mechanism And catalytic reaction rate constants Since the GCE / Au NP-DAT electrode has no electrocatalytic activity for uric acid oxidation, the oxidation signal of IP can be separated from the modified electrode, thereby eliminating the interference of uric acid on the IP determination. As a sensor, the linear dynamic range was 1.0-1500.0 μmol / L and the detection limit was 0.46 μmol / L when used for differential pulse voltammetry.