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Spontaneous Deposition of Prussian Blue on Reduced Graphene Oxide – Gold Nanoparticles Composites for the Fabrication of Electrochemical Biosensors
Author(s) -
Bai Xiaoyun,
Shiu KwokKeung
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400358
Subject(s) - prussian blue , graphene , biosensor , glucose oxidase , colloidal gold , amperometry , nanoparticle , materials science , electrochemistry , electrode , oxide , hydrogen peroxide , inorganic chemistry , chemical engineering , nuclear chemistry , nanotechnology , chemistry , organic chemistry , metallurgy , engineering
A reduced graphene oxide‐gold nanoparticles‐Prussian blue (RGO‐AuNPs‐PB) composite was prepared by spontaneous deposition of PB on RGO‐AuNPs surface. The GC/RGO‐AuNPs‐PB modified electrode offered good electrocatalytic activity toward the reduction of hydrogen peroxide, indicating the possible synergistic effects of the RGO‐AuNPs‐PB composite material. Direct electron transfer of glucose oxidase (GOD) can be realized after codeposition of GOD and chitosan (CHIT) coating on GC/RGO‐AuNPs‐PB electrode. The resulting GC/RGO‐AuNPs‐PB/GOD‐CHIT biosensor exhibited an excellent amperometric response to glucose with a sensitivity of 84 mA M −1 cm −2 , and a linear range from 13 µM to 2.0 mM at +0.1 V vs. Ag|AgCl reference.