Effect of In2O3 nanofiber structure on the ammonia sensing performances of In2O3/PANI composite nanofibers

Indium oxide/polyaniline (In 2 O 3 /PANI) composite nanofibers with the solid or hollow structure of In 2 O 3 were successfully synthesized via a facile and efficient combined method of electrospinning, high-temperature calcination, and in situ polymerization. Various techniques, including scanning...

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Bibliographic Details
Published in:Journal of materials science 2017-01, Vol.52 (2), p.686-695
Main Authors: Pang, Zengyuan, Nie, Qingxin, Wei, Anfang, Yang, Jie, Huang, Fenglin, Wei, Qufu
Format: Article
Language:English
Subjects:
Ammonia
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electron microscopy
Fourier transforms
Gas sensors
Heterojunctions
High temperature
Indium oxides
Materials Science
Microscopy
Nanofibers
Original Paper
P-n junctions
Polyanilines
Polymer Sciences
Room temperature
Selectivity
Solid Mechanics
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Summary:Indium oxide/polyaniline (In 2 O 3 /PANI) composite nanofibers with the solid or hollow structure of In 2 O 3 were successfully synthesized via a facile and efficient combined method of electrospinning, high-temperature calcination, and in situ polymerization. Various techniques, including scanning electron microscopy, Brunauer–Emmett–Teller, Fourier transform infrared, transmission electron microscopy, and X-ray diffraction, were employed to acquire the morphological, structural, and crystalline information of the prepared samples. The gas sensing performances of the as-obtained composite nanofibers were investigated by a home-made gas sensing test system at room temperature. All the results demonstrated that both solid and hollow In 2 O 3 /PANI composite nanofibers had higher response values than those of pure PANI sensor. In addition, the ammonia sensing properties of hollow In 2 O 3 /PANI composite nanofibers were much better than that of the solid ones. Furthermore, hollow In 2 O 3 /PANI composite nanofibers also showed ideal repeatability and selectivity due to their more and different types of P-N heterojunctions.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-016-0362-1