| Titre : |
Biosynthesis of ZnO nanoparticles and effect of silver doping in gas sensing characteristics of volatile organic compounds |
| Type de document : |
texte imprimé |
| Auteurs : |
Anil Kumar, Auteur ; Ravi Kumar, Auteur ; Rakesh Singh, Auteur ; B. Prasad, Auteur ; Dinesh Kumar, Auteur ; Mukesh Kumar, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 685-697 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse structurale (ingénierie)
Argent
Biosynthèse
Capteurs (technologie)
Composés inorganiques -- Synthèse
Détecteurs de gaz
Fourier, Spectroscopie infrarouge à transformée de
Granulométrie
Morphologie (matériaux)
Nanoparticules
Oxyde de zinc
Résistance chimique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This experimental study describes the gas sensing characteristics of biosynthesized ZnO nanoparticles toward a group of volatile organic compounds (VOCs) like benzene, acetone, formaldehyde, methanol and ethanol. The effect of doping of different concentrations of silver nanoparticles in ZnO to improve the sensing response of the mentioned VOCs has also been studied. The structural analysis of the synthesized nanoparticles was carried out using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The morphological investigations were performed using high-resolution transmission electron microscopy (HRTEM). Elemental analysis of the synthesized thin film was carried out by energy-dispersive X-ray spectroscopy (EDX). The gas sensing properties for pure ZnO and Ag-doped ZnO thin films were carried out for different (VOCs). On the basis of experimental results, the optimized Ag-doped ZnO nanoparticles were used for the measurement of gas sensing properties of ethanol gas. The observed gas sensor response has been explained using a chemisorption-based sensing mechanism in metal oxide semiconductor devices. Different sensing parameters like sensitivity, sensor response and recovery time have been measured. The sensor response of both materials has been compared with different concentrations of targeted VOCs. It has been observed that Ag-ZnO exhibits improved sensitivity as compared to pure ZnO. The optimized Ag(15%)ZnO thin films were found to be more selective toward ethanol with ~81% sensor response at 250 °C. |
| Note de contenu : |
- BIOSYNTHESIS OF ZNO NANOPARTICLES
- SYNTHESIS OF AG NANOPARTICLES : Preparation of Ag-doped ZnO and fabrication of sensor device
- RESULTS AND DISCUSSION, I : Structural analysis - FTIR spectra analysis - Surface morphological, grain size, and elemental composition studies
- GAS SENSING MEASUREMENT SETUP
- RESULTS AND DISCUSSION, II : Sensing characteristics of ZnO and Ag-doped ZnO nanoparticles - Sensing mechanism and gas sensing measurements
- Table 1 : Ethanol sensing characteristics of different ZnO-based nanomaterials |
| DOI : |
https://doi.org/10.1007/s11998-021-00543-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00543-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37297 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 685-697
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Biosynthesis of ZnO nanoparticles and effect of silver doping in gas sensing characteristics of volatile organic compounds in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
