Anatase Ag-TiO2 nanostructures are synthesized by combining facile hydrothermal and co-precipitation methods. The photocatalytic and electrochemical activities of the product have been investigated. X-ray diffraction and microscopic results demonstrate that Ag nanoparticles of 15-20 rim size are well dispersed on the TiO2 surface and confirm the formation of Ag-TiO2 nanocomposite. The photocatalytic properties of the composite are evaluated in term of its capability to degrade both model organic dyes, such as rhodamine B, methylene blue and methyl orange, and dyes collected from textile industry under UV irradiation. The results indicate that the Ag-TiO2 nanocomposite exhibits excellent photocatalytic activity as compared to pure anatase TiO2. Moreover, the Ag TiO2 nanocomposite modified glassy carbon electrode demonstrates the abilities to electrocatalyze the hydrogen peroxide and substantially raise the response current. The modified electrode exhibits a reproducible sensitivity of 73.35 mu A mM(-1) cm(-2) to H2O2 with a response time less than 3 s. The electrode also shows a linear range from 2 to 30 mM with a low limit of detection of 0.5 mM (S/N = 3). Furthermore, it has been revealed that the electrode exhibits a favorable stability over relatively long-term storage (more than 75 days). All these results illustrate that Ag-TiO2 nanocomposite exhibits a great prospect for the development of efficient environmental remediator and non-enzymetic biosensor. (C) 2016 Elsevier B.V. All rights reserved.