直接电化学方法制备石墨烯修饰电极及对肼的检测  

Fabrication of Graphene Modified Electrode by Direct Electrichemical Method and Its Application in Determination of Hydrazine

作　　者：王毅[1] 于浩[1] 简选[1] 贺小芳[1] 齐广才[1] 

机构地区：[1]延安大学化学与化工学院,陕西延安716000

出　　处：《分析测试学报》2012年第12期1581-1585,共5页Journal of Instrumental Analysis

基　　金：陕西省自然科学基金项目(2010JQ2005)

摘　　要：采用循环伏安法制备了石墨烯修饰玻碳电极并对其进行表征。研究了肼在石墨烯修饰玻碳电极上的电化学行为。结果表明:石墨烯修饰电极对肼有良好的电催化活性,在BR缓冲溶液(pH 7.0)中动态安培法检测肼的线性范围分别为1.0×10-8～4.4×10-7mol.L-1和4.4×10-7～1.3×10-4mol·L-1,检出限(3sb)为9.9×10-9mol·L-1,利用该方法测定了模拟水样中肼的含量,平均加标回收率为100%。A grapgene modified glassy carbon electrode was fabricated by cyclic voltammetry and was characterized by IR,XRD and SEM techniques.The electrochemistry behavior of hydrazine on the modified electrode was also investigated.The results showed that the modified electrode had high electrocatalytic activity to the oxidation of hydrazine.Based on this,an amperometry technique for the determation of hydrazine was established.Under the optimum conditions,the oxidation peak current had linear relationships with concentration of hydrazine in the ranges of 1.0×10-8-4.4×10-7mol·L-1 and 4.4×10-7-1.3×10-4 mol·L-1 with a detection limit（3sb） of 9.9×10-9 mol·L-1.The proposed method was applied in the determination of hydrazine in simulation water with spiked recoveries of 100%.

关 键 词：石墨烯 电沉积 化学修饰电极 肼 

分 类 号：O657.1[理学—分析化学] O625.66[理学—化学]