Ag nanoparticle-clecorated 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 inM (r = 0.991) and a low LOD of 1.70 mu M at a signal-to-noise ratio of 3. (C) 2012 Elsevier Ltd. All rights reserved.