1D NiO-SnO2 Heterojunction Nanofibers as Acetone Sensor

Abstract

Abstract1D NiO-SnO 2 nanofibers with p-n heterostructure were synthesized by electrospinning with post-synthetic heat treatment. The morphology and composition were characterized by scanning electron microscope, X-ray diffraction, and energy dispersive X-ray spectrometry. A possible growth model was proposed to describe the formation of hierarchical NiO-SnO 2 . The gas sensors based on NiO-SnO 2 exhibited p-type response to acetone. The excellent acetone sensing properties may be attributed to numerous p-n junctions between NiO and SnO 2 nanograins as well as the unique architecture. The changes of energy level and space charge layer of NiO-SnO 2 heterojunction nanofibers when exposed to acetone are described in detail.

Electrospun (Nickel and palladium) tin(IV) oxide/polyaniline/polyhydroxy-3-butyrate biodegradable nanocomposite fibers for low temperature ethanol gas sensing

“…Ni is one of the common transition metals used for doping SnO 2, due to its comparable sensing performance with noble metal-doped SnO 2 . The dramtic changes in the sensing capability of Ni doped SnO 2 is strongly related to the p-n heterojunction, which increases the thickness of the depletion layer, consequently raising the resistance of the sensor material [11,17,[19][20][21]. Palladium (Pd) is also well-known for its catalytic activity, where the target gas molecules activate on the Pd dopant and subsequently transfer to the SnO 2, where they react with chemiabsorbed oxygen ions [22][23][24].…”

Study of structural properties and defects of Ni-doped SnO2nanorods as ethanol gas sensors

“…Various techniques such as sol gel [10], solvothermal [11], electrospinning [12], co-precipitation [13], hydrothermal [14] and polymer precursor [15]methods have been reported for the synthesis of Ni-doped SnO 2 . Among them, the hydrothermal method has been considered as a facile and effective in situ doping method.…”