Here, a one-step synthesis of TiO2-CdS-Ag nanocomposite by microwave method was reported for the first time. Besides, the effects of preparation parameters such as reaction time and microwave power on the size, morphology and photocatalyst activity of TiO2-CdS-Ag nanocomposite were studied by SEM. Structure and composition of the obtained products were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), spectra energy dispersive analysis of X-ray (EDS) and ultraviolet-visible (UV-vis) techniques. (C) 2016 Elsevier B.V. All rights reserved.