摘要
纳米ZnO修饰玻碳电极在0.23V对烟酰胺腺嘌呤二核苷酸(NADH)的氧化具有很好的催化活性,与裸电极上NADH的氧化电位0.70V相比,该电位降低了0.47V,同时增强了抗干扰能力,并在很大程度上减小了电极污染.以乙醇脱氢酶(ADH)为例,制备了ADH/ZnO修饰电极,可用于脱氢酶底物乙醇的快速、灵敏检测,并具有良好的重现性和稳定性.研究表明纳米ZnO为构建脱氢酶底物的电化学传感器提供了一种新的生物兼容性材料.
The good catalytic activity of ZnO nanomaterial to the oxidation of nicotinamide adenine dinucleotide (NADH) was described for biosensing application. Compared to a bare electrode, the modified electrode decreased the oxidation overpotential of NADH for 0.47 V, decreased the interferences and minimized the surface fouling. With alcohol dehydrogenase (ADH) as a model, the proposed biosensor showed rapid and sensitive amperometric responses to ethanol with acceptable preparation reproducibility and stability. Nano-ZnO provided an efficient matrix for development of NADH biosensors and the prepared electrode can be used not only to detect the concentration of NADH in a biochemical reaction, but also used as the potential matrix for the construction of dehydrogenases.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第15期1786-1790,共5页
Acta Chimica Sinica
基金
国家自然科学基金(No.20505010)
生命分析化学教育部重点实验室开放基金(No.KLACLS07003)资助项目