1D N-type SnO2 nanofibers coexisted with P-type Co3O4 cubes for highly selective acetone sensor

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Tang, W.^1 ; Li, D.W.^1 ; Du, X.J.^1 ; Yu, J.^1 ; Sun, Q.Q.^1

Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan Province Jinan

250014, China^1

关键词: Acetone sensing;    Acetone sensor;    Growth mechanisms;    Hydrothermal process;    Impurity peaks;    Morphology and composition;    Selective response;    Tetragonal rutile structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012116/pdf
DOI  :  10.1088/1757-899X/479/1/012116

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

1D n-type SnO2 nanofibers coexisted with p-type Co3O4 particles were synthesized by electrospinning with subsequent hydro-thermal process. The morphology and composition of Co3O4/SnO2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). XRD patterns showed that the synthesized Co3O4/SnO2 were assigned to cubic Co3O4 and tetragonal rutile structure of SnO2 without any other impurity peaks. A possible growth mechanism was proposed to describe the formation of hierarchical SnO2 nanofibers coexisted with Co3O4 cubes. The Co3O4/SnO2 compound exhibited a relatively highly selective response to acetone and stable acetone sensing performance after a long period of aging. The Co3O4/SnO2 compound had a p-type response. It may be ascribed to the high coverage of p-type Co3O4 on n-type SnO2. The excellent acetone sensing properties of Co3O4/SnO2 nanostructures may be attributed to p-n junctions between Co3O4 and SnO2 nanograins as well as the unique coexistence structure of nanofibers and cubes.