Porous InNbO4 nanofibers with diameters of 50-100 nm were prepared by a facile electrospinning method combined with subsequent annealing. The resulting photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (UV-vis DRS), and nitrogen-sorption analysis. The photocatalytic activity of the photocatalysts was evaluated by degradation of Rhodamine B under visible-light irradiation. Results demonstrate that the photocatalytic activity of the as-formed porous InNbO4 nanofibers by electrospinning is improved, in comparison to that of the InNbO4 crystallites that were prepared by a high-temperature solid-state reaction. The enhanced visible-light-driven photocatalytic activity is attributed to the porous nanofibrous architecture, high surface area, and narrower band gap. (C) 2014 Elsevier B. V. All rights reserved.