Green photocatalytic synthesis of Ag nanoparticle-decorated TiO2 nanowires for nonenzymatic amperometric H2O2 detection

Ag nanoparticle-decorated TiO2 nanowires (AgNP–TiO2 NWs) have been successfully fabricated through a green photocatalytic process, carried out by irradiating the mixture of AgNO3 solution in ethanol and pre-formed TiO2 NWs under UV light. Such nanocomposites exhibit remarkable catalytic performance toward the reduction of H2O2 and this H2O2 sensor shows a wide linear range of 0.1 mM to 60 mM (r = 0.991) and a low LOD of 1.70 μM at a signal-to-noise ratio of 3.