Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (9): 2097.doi: 10.7503/cjcu20121075

• Analytical Chemistry • Previous Articles     Next Articles

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

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

CLC Number: 

TrendMD: