Fast response of CO2 room temperature gas sensor based on Mixed-Valence Phases in Molybdenum and Tungsten Oxide nanostructured thin films

Basit Öğe Kaydı
dc.contributor.authorBasyooni, Mohamed A.
dc.contributor.authorZaki, Shrouk E.
dc.contributor.authorErtugrul, Sezin
dc.contributor.authorYilmaz, Mucahit
dc.contributor.authorEker, Yasin Ramazan
dc.date.accessioned2024-02-23T14:02:24Z
dc.date.available2024-02-23T14:02:24Z
dc.date.issued2020
dc.departmentNEÜen_US
dc.description.abstractMolybdenum - tungsten oxide (Mo1-xWxO3, x = 1, 0.8, and 0.6) nanostructured thin films-based room temperture (RT) gas sensors are prepared by means of reactive RF magnetron co-sputtering at 400 degrees C. The structural, morphology, topography, optical, and electrical characterizations of the prepared sensors are carried out by XRD Rietveld structure refinement analyses, SEM, AFM, UV-VIS spectrophotometer, and source meter. By controlling the deposition temperture of 400 degrees C, a co-existing phase of MoO3 and MoO2 in WO3 matrix is presented with high oxygen vacancies concentration as calculated from the XRD Rietveld Refinement analyses. By increasing the Mo content, the calculated oxygen vacancies concentration increases by factor of 1.36. The optical characterization of Mo0.2W0.6O3 thin film shows a high transparent of 99.6% at 500 nm. The prepared thin films have successfully tested to detect carbon dioxide (CO2) at RT (20 degrees C) with high selectivity and repeatability. The Mo0.4W0.6O3 sensor film shows an electrical Schottky contact with fast response and recovery times towards CO2 under UV light activation. Mo0.4W0.6O3 thin film under dark and UV conditions were able to detect low CO2 concentration of 2 and 0.5 sccm CO2 M RT, respectively. Under UV illumination, Mo0.4W0.6O3 film shows a fast response and recovery time of 6.53 and 8.05 sat 0.5 sccm with sensitivity of 29.19%. Under UV photonic activation, higher electron concentration is presented in the oxide surface, which leads to high probability for reaction with CO2 molecules, and consequently enhanced the chemisorption of CO2. The enhanced CO2 gas sensitivity and fast response may refer to the high oxygen vacancies concentration and the active role of the grain boundaries in MoO2, MoO3 and WO3 mixed-valence nanostructured under UV activation.en_US
dc.description.sponsorshipScientific Research Projects Coordination Unit at Konya Necmettin Erbakan University [181710001]en_US
dc.description.sponsorshipThis work has been supported by the Scientific Research Projects Coordination Unit at Konya Necmettin Erbakan University with Grant No: 181710001.en_US
dc.identifier.doi10.1016/j.ceramint.2019.12.259
dc.identifier.endpage9853en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-85077708091en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage9839en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2019.12.259
dc.identifier.urihttps://hdl.handle.net/20.500.12452/11695
dc.identifier.volume46en_US
dc.identifier.wosWOS:000528340500161en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectGas Sensoren_US
dc.subjectOxygen Vacancyen_US
dc.subjectMetal Oxide Semiconductoren_US
dc.subjectThin Filmen_US
dc.subjectNanostructuresen_US
dc.titleFast response of CO2 room temperature gas sensor based on Mixed-Valence Phases in Molybdenum and Tungsten Oxide nanostructured thin filmsen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu