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

Vanadium (V)-doped tin oxide (SnO₂) one-dimensional porous nanofibers (PNFs) were fabricated for the hydrogen detection application. V-doping changes the distances of different facets of the SnO₂ crystal in different roles, and therefore deform or distort the SnO₂ structure. The modulation effects of V⁴⁺ and V⁵⁺ on hydrogen detecting performance were discussed. With a suitable amount of V-doping, the porous SnO₂ nanofibers exhibits ~66% increase of response sensitivity, 33% faster in response (2s) and 50% faster in recovery time (1s), comparing with undoped SnO₂ nanofibers.