Au‐TiO₂/Graphene Nanocomposite Film for Electrochemical Sensing of Hydrogen Peroxide and NADH

Abstract

We describe a simple method for preparing Au‐TiO2/graphene (GR) nanocomposite by deposition of Au nanoparticles (NPs) on TiO2/GR substrates. The as‐prepared Au‐TiO2/GR was characterized by X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The presence of Au NPs on TiO2/GR surface remarkably improves the electrocatalytic activity towards the oxidation of hydrogen peroxide (H2O2) and β‐nicotinamide adenine dinucleotide (NADH). The Au‐TiO2/GR modified glassy carbon (GC) electrode exhibits good amperometric response to H2O2 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.

Graphene for Detection of Adenosine Triphosphate, Nicotinamide Adenine Dinucleotide, Other Molecules, Gas, and Ions

“…Using graphene as a good substrate, various materials have been incorporated with graphene to form hybrids with tailoring and tunable properties for electrochemical NADH determination, including IL [30,31], methylene blue [32,33], methylene green [34], AuNPs [35,36], metal-nitride [37], TiO 2 [38], MWCNTs [39], and PEDOT:PSS [40]. Our group firstly exploited IL-functionalized graphene (IL-graphene) [41] for low-potential NADH detection [31].…”

Graphene‐Based Nanohybrids for Advanced Electrochemical Sensing

“…Various materials have been incorporated with graphene to form hybrids for electrochemical NADH determination, including IL 156, 157, methylene blue 158, 159, methylene green 160, Au NPs 161, 162, metal‐nitride 163, TiO 2 164 MWCNTs 165, and poly(3,4‐ethylenedioxythiophene):PSS 166, etc. Our group firstly exploited IL functionalized graphene (IL‐graphene) 78 for low‐potential NADH detection 157.…”

Electrochemical Detection of H2O2 Based on Fe3O4 Nanoparticles with Graphene Oxide and Polyamidoamine Dendrimer

“…It can be applied in many organic compound synthesis reactions [4]. It is also a byproduct of the large number of reactions [5]. Therefore, the methods of detecting H 2 O 2 , such as titrimetry [6], electrochemistry [7], spectrometry [8], and chemiluminescence [9], have attracted more attention around the world.…”