Highly sensitive and selective PAni-CeO2 nanohybrid for detection of NH3 biomarker at room temperature

An impressive room temperature (25 °C) NH 3 biomarker sensor has been developed using polyaniline (PAni)-CeO 2 nanohybrid by facile oxidative polymerization process on glass substrates. The structural properties of PAni-CeO 2 nanohybrids were disclosed using X-ray diffractometry, and the surface mor...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2023-03, Vol.34 (9), p.781, Article 781
Main Authors: Dhanawade, Reshma N., Pawar, Nanasaheb S., Chougule, Manik A., Hingangavkar, Gajanan M., Jadhav, Yogesh M., Nimbalkar, Tanaji M., Navale, Yuvraj H., Chavan, Ganesh T., Jeon, Chan-Wook, Patil, Vikas B.
Format: Article
Language:English
Subjects:
Ammonia
Biomarkers
Cerium oxides
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystal structure
Current carriers
Electron microscopy
Emission analysis
Field emission microscopy
Gas sensors
Glass substrates
Heterojunctions
Materials Science
Microscopy
Morphology
Nanofibers
Nanoparticles
Optical and Electronic Materials
Photoelectrons
Polyanilines
Room temperature
Sensors
Spectrum analysis
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Summary:An impressive room temperature (25 °C) NH 3 biomarker sensor has been developed using polyaniline (PAni)-CeO 2 nanohybrid by facile oxidative polymerization process on glass substrates. The structural properties of PAni-CeO 2 nanohybrids were disclosed using X-ray diffractometry, and the surface morphology was studied using field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy techniques. The PAni-CeO 2 nanohybrids shows cubic crystal structure with strongly interconnected nanofiber surface morphology. The chemiresistive gas sensing performance of the PAni-CeO 2 nanohybrid sensor reveals that the CeO 2 nanoparticles (NPs) have a significant impact on the hybrid sensor. The CeO 2 NPs in the PAni-CeO 2 nanohybrid might block the charge carriers or reduce the delocalization length and hence increase the resistance of the nanohybrid when exposed to NH 3 gas. PAni-CeO 2 (50 wt%) nanohybrid sensor exhibits (80%) response toward 100 ppm NH 3 which is about four-fold higher than pristine PAni (26.70%), showing excellent stability (78.75%), admirable reproducibility with least response time (9.31 s), and such an excellent performance could be imputed to a high explicit surface area of CeO 2 for significant chemical interaction and the formation of interfacial heterojunction bond with CeO 2 , exploring PAni-CeO 2 (50 wt%) nanohybrid as a potential candidate for biomarker NH 3 detection. An impedance spectroscopy was used to investigate the interaction mechanism between the NH 3 gas and the PAni-CeO 2 nanohybrid sensor.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-023-10181-8