Biosynthesis of ZnO nanoparticles and effect of silver doping in gas sensing characteristics of volatile organic compounds / Anil Kumar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 685-697 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 [article]

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