摘要
采用电沉积技术在过氧化聚吡咯膜上制备纳米金,通过扫描电镜和X-射线光电子能谱对复合材料的形貌和结构进行表征。采用循环伏安和计时安培法研究烟酰胺腺嘌呤二核苷酸(Nicotinamide Adenine Dinucleotide,NADH)在纳米金/过氧化聚吡咯复合材料修饰玻碳电极上的电化学催化氧化反应。结果表明,复合材料修饰电极显著降低了NADH的氧化峰电位,峰电流与其浓度在2.0×10^(-7)～1.2×10^(-3)mol/L范围内呈现很好的线性关系,检测限为5.0×10^(-8)mol/L,该修饰电极可用于对NADH的线性检测。
A novel biosensor was fabricated by electrochemical deposition of gold nanoclusters on overoxidized polypyrrole (PPyox) film, formed a nano-Au/PPyox composite on glassy carbon electrode (nano-Au/PPyox/GCE). The properties of the composite have been characterized by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The nano-Au/PPyox/GCE had strongly catalytic activity toward the oxidation of nicotinamide adenine dinucleotide (NADH). The catalytic peak currents increased linearly with increasing NADH concentrations in the range of 2.0*10-7 – 1.2*10-3 mol/L with a detection limit of 5.0*10-8. In addition, the composite modified electrode has been applied to determination of NADH with satisfactory results.
作者
李靖
张阳
黎阳
谢华清
LI Jing;ZHANG Yang;LI Yang;XIE Huaqing(School of Environmental and Materials Engineering, Shanghai Polytechnic University,Shanghai 201209, P. R. China)
出处
《上海第二工业大学学报》
2016年第3期175-180,共6页
Journal of Shanghai Polytechnic University
基金
国家自然科学基金(No.51402185)
上海市自然科学基金(No.13ZR1454700)
上海市东方学者岗位支持计划项目资助
关键词
过氧化聚吡咯
电催化氧化
纳米金
烟酰胺腺嘌呤二核苷酸
overoxidized polypyrrole (PPyox)
electrocatalytic oxidation
gold nanoclusters
nicotinamide adenine dinucleotide (NADH)
