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Au‐TiO 2 /Graphene Nanocomposite Film for Electrochemical Sensing of Hydrogen Peroxide and NADH
Author(s) -
Fan Yang,
Yang Xin,
Yang Chunpeng,
Liu Jinhang
Publication year - 2012
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.201200008
Subject(s) - graphene , nanocomposite , hydrogen peroxide , amperometry , materials science , electrochemistry , nicotinamide adenine dinucleotide , glassy carbon , transmission electron microscopy , electrocatalyst , nuclear chemistry , detection limit , nanoparticle , inorganic chemistry , chemical engineering , electrode , chemistry , nanotechnology , nad+ kinase , cyclic voltammetry , organic chemistry , chromatography , enzyme , engineering
We describe a simple method for preparing Au‐TiO 2 /graphene (GR) nanocomposite by deposition of Au nanoparticles (NPs) on TiO 2 /GR substrates. The as‐prepared Au‐TiO 2 /GR was characterized by X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The presence of Au NPs on TiO 2 /GR surface remarkably improves the electrocatalytic activity towards the oxidation of hydrogen peroxide (H 2 O 2 ) and β ‐nicotinamide adenine dinucleotide (NADH). The Au‐TiO 2 /GR modified glassy carbon (GC) electrode exhibits good amperometric response to H 2 O 2 and NADH, with linear range from 10 to 200 µM and 10 to 240 µM, and detection limit of 0.7 and 0.2 µM, respectively.