KnE Materials Science | IV Sino-Russian ASRTU Symposium on Advanced Materials and Processing Technology (ASRTU) | pages: 172-176

DOI: 10.18502/kms.v1i1.581

1D NiO-SnO2 Heterojunction Nanofibers as Acetone Sensor

W. Tang
wangjing@dlut.edu.cn
,

J. Wang
,

Abstract

1D NiO-SnO2 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-SnO2. The gas sensors based on NiO-SnO2 exhibited p-type response to acetone. The excellent acetone sensing properties may be attributed to numerous p-n junctions between NiO and SnO2 nanograins as well as the unique architecture. The changes of energy level and space charge layer of NiO-SnO2 heterojunction nanofibers when exposed to acetone are described in detail.

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ISSN: 2519-1438