LAUSR

Abstract Hollow porous pure and La 2 O 3 doped Zn 2 SnO 4 fibers were synthesized via single capillary electrospinning technology and used for obtaining of gas sensors. The as-prepared samples were characterized by microscopy, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy and UV-vis absorption spectra. The newly obtained gas sensors were investigated for acetone detection. Compared with pure Zn 2 SnO 4 hollow fibers, the La 2 O 3 doped Zn 2 SnO 4 hollow fibers not only exhibited perfect sensing performance toward acetone with excellent selectivity, high response and fast response/recovery capability (7 s for adsorption and 9 s for desorption), but also the operating temperature was reduced from 240 °C to 200 °C. These results demonstrated that the special hollow porous La doped Zn 2 SnO 4 fibers structures were used as the sensing material for fabricating high performance acetone sensors. The acetone sensing mechanism of La 2 O 3 doped Zn 2 SnO 4 hollow fibers was discussed too.