Pristine and vanadium-doped In2O3 nanofibers were fabricated by electrospinning and their sensing properties to H2S gas were studied. X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to investigate the inner structure and the surface morphology. The H2S-sensing performances were characterized at different temperatures ranging from 50 to 170 degrees C. The sensor based on 6 mol% V-doped In2O3 nanofibers exhibit the highest response, i.e. 13.9-50 ppm H2S at the relatively low temperature of 90 degrees C. In addition, the fast response (15 s) and recovery (18 s) time, and good selectivity were observed. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.