高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (9): 2097.doi: 10.7503/cjcu20121075

• 分析化学 • 上一篇    下一篇

基于聚乙烯醇离子液体负载HRP修饰石墨烯/纳米金复合膜的过氧化氢生物传感器

屈建莹, 康世平, 娄童芳, 杜学萍   

  1. 河南大学化学化工学院, 环境与分析科学研究所, 开封 475004
  • 收稿日期:2012-11-29 出版日期:2013-09-10 发布日期:2013-08-30
  • 作者简介:屈建莹,女,博士,副教授,主要从事电化学生物传感器的研究与应用.E-mail:lilyqujy@yahoo.com.cn
  • 基金资助:

    国家自然科学基金(批准号:31000065)资助.

Detection of H2O2 at Composite Membrane of [bmim] FeCl4 and PVA Loading HRP Modified Graphene/nano Au

QU Jian-Ying, KANG Shi-Ping, LOU Tong-Fang, DU Xue-Ping   

  1. Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
  • Received:2012-11-29 Online:2013-09-10 Published:2013-08-30

摘要:

以石墨烯/纳米金修饰玻碳电极为基底, 用聚乙烯醇与离子液体复合物将辣根过氧化物酶固定于电极表面, 制备了过氧化氢生物传感器. 结果表明, 在0.1 mol/L HAc-NaAc+0.1mol/L KCl(pH=6.5)中, H2O2的氧化峰电流与其浓度在9.55×10-6~6.01×10-3 mol/L间呈良好线性关系, 检出限(3S/N)为3.3×10-7 mol/L. 用标准加入法做回收实验, 回收率在93.4%~100.5%之间. 该传感器对H2O2具有较高的灵敏度和较低的检测限, 稳定性和重现性良好, 使用寿命较长, 且制作成本低, 可多次重复使用.

关键词: 生物传感器, 纳米金, 石墨烯, 1-丁基-3-甲基咪唑四氯化铁盐, 辣根过氧化物酶

Abstract:

Polyvinyl alcohol-ionic liquids(PVA-ILs) composite sol, graphenes(GS) and nano-Au were used to immobilize horseradish peroxidase(HRP). A novel hydrogen peroxide biosensor(HRP/PVA-ILs/HRP/nano Au-GS/GC) was obtained by immobilizing HRP with composite membrane of PVA-ILs on a glassy carbon(GC) electrode, which was modified with graphenes and nano Au. The experimental condition was optimized and the electrochemistry behavior of the HRP/PVA-ILs/HRP/nano Au-GS/GC biosensor in 0.1 mol/L HAc-NaAc+0.1 mol/L KCl(pH=6.5) including H2O2 was discussed. The response of the sensor to H2O2 is linear in the range of 9.55×10-6—6.01×10-3 mol/L with a correlation coefficient of 0.9990. The detection limit is 3.3×10-7 mol/L. The experiments show that the biosensor exhibits high sensitivity, good reproducibility and stability and longer service life.

Key words: Biosensor, Nano-Au, Graphene, 1-Butyl-3-methylimidazolium tetrachloroferrate, Horseradish peroxidase

中图分类号: 

TrendMD: