摘要
以碳纳米管为模板,采用电化学方法制备了碳纳米管负载的钴/铁混合氧化物修饰电极,并研究了该修饰电极在碱性介质中对葡萄糖的电催化活性.结果表明,该修饰电极对葡萄糖具有良好的电催化氧化活性.在优化条件下,安培法检测葡萄糖的线性范围为2.0 x 10-7~4.2x10-5 mol·L-1和4.2x10-5~4.9x10-4 mol·L-1,检出限(3sb,n=7)为5.0 x10-8 mol·L-1,灵敏度分别为242.7UA·(mmol·L-1)-1和114.8 μA·(mmol·L-1)-1。
A MWCNTs loading cobalt-iron mixed oxide modified electrode was fabricated by using cy-clic vohammetry. The electrocatalytic activity of the modified electrode for the oxidation of glucosewas investigated by cyclic vohammetry and amperometric method. The results showed that the modi-fied electrode exhibited a high electrocatalytic activity for the oxidation of glucose. Based on this, anamperometric method for the determination of glucose was established. Under the optimum condi-tions, the oxidation peak current had linear relationships with concentrations of glucose over the ran-ges of 2. 0 x 10-7 -4. 2 x 10-5 mol· L-1 and 4. 2 x 10-5 -4. 9 x 10-4 mol · L-1 , with sensitivitiesof 242. 7 μA· ( mmol · L-1 ) -1 and 114. 8 μA· (mmol · L-1 ) -1 , respectively. The detection lim-it(3ss) was 5.0 x 10-8 tool · L-1 The proposed method was successfully applied in the detection ofglucose in serum.
出处
《分析测试学报》
CAS
CSCD
北大核心
2014年第5期572-577,共6页
Journal of Instrumental Analysis
基金
陕西省自然科学基金项目(2010JQ2005)
关键词
钴
铁混合氧化物
碳纳米管
葡萄糖
电催化
cobalt-iron mixed oxide
multi-wall carbon nanotubes
glucose
electrocatalytic oxida-tion