Polyoxometalate-grafted graphene nanohybrid for electrochemical detection of hydrogen peroxide and glucose

J Colloid Interface Sci. 2016 Apr 15:468:51-56. doi: 10.1016/j.jcis.2016.01.047. Epub 2016 Jan 22.

Abstract

The electrochemical performances of electrochemical biosensors largely depend on electrode characteristics, such as size, composition, surface area, and electron and ion conductivities. Herein, highly efficient electrocatalytic polyoxometalate (POM) was directly deposited on polymeric ionic liquid (PIL)-functionalized reduced graphene oxide (rGO) in a simple manner. The nano-sized POM with PIL functional groups was uniformly distributed on the surface of rGO sheets. The unique nanostructure of the resultant POM-g-rGO nanohybrids enabled well-defined multiple redox reaction of POMs and rapid electron transfer. In particular, as-prepared nanohybrids demonstrated high electrocatalytic activity for the electrochemical detection of H2O2 and glucose molecules in flow-injection biosensor device with high sensitivity, rapid response time, and low detection limit.

Keywords: Electrochemical sensor; Graphene; Ionic liquid; Nanohybrid; Polyoxometalate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electrochemical Techniques*
  • Glucose / analysis*
  • Graphite / chemistry*
  • Hydrogen Peroxide / analysis*
  • Nanostructures / chemistry*
  • Particle Size
  • Surface Properties
  • Tungsten Compounds / chemistry*

Substances

  • Tungsten Compounds
  • polyoxometalate I
  • Graphite
  • Hydrogen Peroxide
  • Glucose