Fabrication of Highly Sensitive Nonenzymatic Electrochemical H2O2 Sensor Based on Pt Nanoparticles Anchored Reduced Graphene Oxide.
J Nanosci Nanotechnol
; 18(6): 4380-4386, 2018 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-29442791
ABSTRACT
A highly sensitive nonenzymatic hydrogen peroxide (H2O2) sensor was fabricated using platinum nanoparticles decorated reduced graphene oxide (Pt/rGO) nanocomposite. The Pt/rGO nanocomposite was prepared by single-step chemical reduction method. Nanocomposite was characterized by various analytical techniques including Raman spectroscopy, X-ray diffraction, field emission scanning electron microscope and high-resolution transmission electron microscopy. Screen printed electrodes (SPEs) were fabricated and the nanocomposite was cast on the working area of the SPE. Cyclic voltammetry and amperometry demonstrated that the Pt/rGO/SPE displayed much higher electrocatalytic activity towards the reduction of H2O2 than the other modified electrodes. The sensor exhibited wide linear detection range (from 10 µM to 8 mM), very high sensitivity of 1848 µA mM-1 cm-2 and a lower limit of detection of 0.06 µM. The excellent performance of Pt/rGO/SPE sensor were attributed to the reduced graphene oxide being used as an effective matrix to load a number of Pt nanoparticles and the synergistic amplification effect of the two kinds of nanomaterials. Moreover, the sensor showed remarkable features such as good reproducibility, repeatability, long-term stability, and selectivity.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Nanopartículas
/
Grafite
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Peróxido de Hidrogênio
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article