| Autor: |
Kulkarni, S. B., Navale, Y. H., Navale, S. T., Stadler, F. J., Patil, V. B. |
| Předmět: |
|
| Zdroj: |
Journal of Materials Science: Materials in Electronics; May2019, Vol. 30 Issue 9, p8371-8380, 10p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink