Preparation of One-dimensional Pt/SnO2 Nanofibers and NOx Gas-sensing Properties

D Pt/SnO2 hollow nanofibers were synthesized by electrospinning method to prepare and to study the nanomaterials with the higher sensitivity and faster response to NOx at room temperature. The characteristics and morphology of material were studied by XRD, SEM and TEM. NOx gas sensor was tested at room temperature. The results show that the 1D Pt/SnO2 nanomaterials is hollow tubular and similar tubular structure. The sample with 0.3wt% Pt has the highest sensitivity, the fastest response to 9.7×10 -5 V/V NOx, the sensitivity up to 109.6% and re- sponse time of 11.33 s. When the sample is doped with Pt 0.5wt%, its limit level is 2.91×10 -6 V/V.