硫堇/Nafion/石墨烯修饰电极对NADH的电催化活性研究  

Study of electrochemical catalytic properities of TH/Nafion/graphene composite toword NADH

作　　者：杨尚文[1] 高英[1] 

机构地区：[1]长春工程学院理学院,吉林长春130012

出　　处：《分子科学学报》2015年第2期171-176,共6页Journal of Molecular Science

基　　金：国家自然科学基金资助项目(21427811和51275055);吉林省自然科学基金资助项目(20140101153JC)

摘　　要：为了提高电化学检测NADH的分析性能,制备了硫堇/Nafion/石墨烯修饰的玻碳电极(GCE),利用Nifion的强离子交换能力将硫堇修饰在电极表面,形成硫堇/Nafion/石墨烯复合电极.与裸玻碳电极相比,在NADH的反应中观察到了电位明显降低和电流响应显著增大.证实了硫堇/Nafion/石墨烯复合电极对NADH有协同的电催化能力.为构造有效地检测NADH的电化学传感器提供一个良好的应用平台.TH/Nafion/Graphene/GCE was prepared by ion-exchange procedure.Electrochemical behaviors of the resulting electrode were investigated thoroughly with cyclic voltammetry,and a well-defined redox couples was clearly visualized.Under a lower operation potential of 0.1Vin 0.1mol·L-1 PBS（pH 7.0）,NADH could be detected linearly up to a concentration of 2.00×10-6~4.85×10-4 mol·L-1 with an extremely lower detection limit of 5.74×10-9 mol·L-1 estimated（S/N=3）.The feasibility for simultaneous determination of uric acid,dopamine,AP and NADH was discussed.They did not interfere each other in certain concentration.Based on the results,a new NADH sensor was successfully established using the TH/Nafion/Graphene/GCE.

关 键 词：石墨烯 电催化:硫堇 NADH 

分 类 号：O657[理学—分析化学]