Room temperature ammonia gas sensing properties of polyaniline nanofibers
| Autor: | V. B. Patil, Florian J. Stadler, Y. H. Navale, Sachin T. Navale, S. B. Kulkarni |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Polyaniline nanofibers Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Dielectric spectroscopy symbols.namesake chemistry.chemical_compound Aniline chemistry X-ray photoelectron spectroscopy Polymerization Chemical engineering 0103 physical sciences Oxidizing agent symbols Ammonium persulfate Electrical and Electronic Engineering Raman spectroscopy |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 30:8371-8380 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-019-01154-x |
| Popis: | Polyaniline nanofibers (PAni NFs) were synthesized using in-situ chemical oxidative polymerization process, through varying ratios of monomer aniline (AN) and oxidant ammonium persulfate (APS), and utilized for ammonia (NH3) detection. Structure, morphology, and surface composition of as-synthesized PAni NFs was examined through X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field-emission scanning, and transmission electron microscopy. Formation of porous interconnected network of PAni NFs of the diameter of 60–70 nm was confirmed through surface morphological analysis. Effect of varying AN/APS ratios on the gas sensing activities of PAni NFs sensors was studied towards various reducing and oxidizing gases thoroughly and discussed. The PAni NFs sensor developed using equal AN/APS ratio demonstrates excellent selectivity towards NH3 (62% response to 100 ppm) and capable to detect 1 ppm concentration of NH3 at room temperature. The interaction mechanism of the PAni NFs sensor with oxidizing and reducing gases was studied using impedance spectroscopy and discussed. |
| Databáze: | OpenAIRE |
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