Dual-function amperometric sensors based on poly(diallydimethylammoniun chloride)-functionalized reduced graphene oxide/manganese dioxide/gold nanoparticles nanocomposite

Cong Zhang, Yanyan Zhang, Zhiying Miao, Min Ma, Xin Du, Jiahui Lin, Bingkai Han, Shigehiro Takahashi, Junichi Anzai, Qiang Chen

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

In this paper, reduced graphene oxide (RGO)/manganese dioxide (MnO2)/gold nanoparticles (AuNPs) nanocomposite was prepared by a facile, eco-friendly and controllable route, and the morphology of RGO/MnO2/AuNPs nanocomposite was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) analyzer, X-ray diffraction (XRD) spectrum, and Fourier transform infrared spectrum (FT-IR), respectively. And then, taking full advantage of the synergistic effect among RGO, MnO2 and AuNPs, poly(diallyldimethylammonium chloride) (PDDA)-functionalized RGO/MnO2/AuNPs nanocomposite was immobilized on the surface of glassy carbon (GC) electrode to fabricate a novel nonenzymatic hydrogen peroxide sensor, and the results demonstrated that the sensor showed excellent electrocatalytic activity toward H2O2 with ultrahigh sensitivity of 1132.8 μA mM-1 cm-2 and low detection limit of 0.6 μM (S/N = 3). In addition, a glucose biosensor was further fabricated by immobilizing glucose oxidase (GOD) on the surface of the PDDA-RGO/MnO2/AuNPs-modified GC electrode. In glucose determination, the glucose biosensor exhibited excellent performance with a high sensitivity of 83.7 μA mM-1 cm-2, a low detection limit of 1.8 μM (S/N = 3), and a small Km value of 1.54 mM. Moreover, the prepared hydrogen peroxide sensor and glucose biosensor were applied to in real samples with satisfactory results, indicating the prepared sensors are promising in practical application.

Original languageEnglish
Pages (from-to)663-673
Number of pages11
JournalSensors and Actuators, B: Chemical
Volume222
DOIs
Publication statusPublished - 2016 Jan 15

Keywords

  • Glucose biosensor
  • Gold nanoparticles
  • Graphene
  • Hydrogen peroxide sensor
  • Manganese dioxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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