摘要
利用氧化石墨烯（GO）、PtCl6^2-、AuCl^4-作为前驱体,在-0.4 V条件下,采用一步电化学还原法对GO和金属前驱体进行同时还原,成功制备了花瓣状的Pt-Au-GO纳米结构;同时利用伏安法研究了该催化剂对葡萄糖氧化的电催化性能,结果表明,此纳米结构对葡萄糖氧化反应表现出很好的电催化性能;据此构建了无酶葡萄糖传感器,该传感器在较低的电位下（-0.1 V）对葡萄糖的线性检测范围为1.0~25.0 mmol/L,响应灵敏度为26.3μA cm^-2（mmol/L）^-1,检出限为4.0μmol/L（S/N=3）,且传感器具有很好的重现性、稳定性和选择性,可用于实际样品的分析检测。
The flower-shaped Pt-Au-graphene oxide （GO） nanostructures were synthesized by one-step electrochemical reduction method. The electrocatalytic activities of the nanostructures toward glucose oxidation were investigated by cyclic vohammetry. The results indicated that the nanocomposites exhibited a higher electrocatalytic activity than the Pt-Au nanoparticles. A glucose nonenzyme sensor could be easily developed with the use of the flower-shaped Pt-Au-GO nanostructure. The sensor exhibited low detection limit （4.0μmol/L）, a wide and useful linear range （1.0-25.0 mmol/L）, and high sensitivity （26.3μA cm^-2 （mmol）^-l）. In addition, the sensor exhibited excellent reproducibility, stability and selectivity for the determination of glucose, and it could be used to analyze real samples.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2014年第9期1240-1244,共5页
Chinese Journal of Analytical Chemistry
基金
江苏省新型动力电池重点实验室开放课题(No.Power-2013-1)
江苏省大学生实践创新训练计划项目(No.2012JSSPITP2019)
南京晓庄学院青年项目(No.2012NXY98)
关键词
铂-金-石墨烯纳米结构
电化学还原法
葡萄糖氧化反应
无酶生物传感器
Platinum-gold-graphene oxide nanostructures
Electrochemical reduction method
Glucoseoxidation reaction
Non-ezymatic biosensor
