Vanadium-doped tin oxide porous nanofibers: Enhanced responsivity for hydrogen detection

Vanadium (V)-doped tin oxide (SnO 2 ) one-dimensional porous nanofibers (PNFs) were fabricated for the hydrogen detection application. V-doping changes the distances of different facets of the SnO 2 crystal in different roles, and therefore deform or distort the SnO 2 structure. The modulation effects of V 4+ and V 5+ on hydrogen detecting performance were discussed. With a suitable amount of V-doping, the porous SnO 2 nanofibers exhibits ~66% increase of response sensitivity, 33% faster in response (2   s) and 50% faster in recovery time (1   s), comparing with undoped SnO 2 nanofibers.