High optical response NiO, Pd/NiO and Pd/WO3 hydrogen sensors

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dc.authoridGur, Emre/0000-0002-3606-2751
dc.authoridCOBAN, OMER/0000-0003-4312-9026
dc.contributor.authorCoban, Omer
dc.contributor.authorTekmen, Suleyman
dc.contributor.authorGur, Emre
dc.contributor.authorTuzemen, Sebahattin
dc.date.accessioned2024-10-04T18:51:04Z
dc.date.available2024-10-04T18:51:04Z
dc.date.issued2022
dc.departmentBayburt Üniversitesien_US
dc.description.abstractIn this study, NiO and WO3 oxide semiconductors were fabricated on glass substrates by RF Magnetron Sputtering technique. Structural and optical characterizations of the semiconductors were performed using XRD, SEM, and optical absorption measurements. NiO and WO3 thin films were occasionally coated with palladium. In order to investigate the optical response of these semiconductors under hydrogen gas exposure, an optical gas sensor test system was installed and programmed. In both of the coated and uncoated cases, optical absorption changes due to hydrogen gas exposure on the surface were investigated. It was observed that these changes occur between 450 and 850 nm wave lengths range. The absorption in the NiO semiconductor was reduced between these wave lengths, while the absorption was increased in the WO3 semiconductor. In the uncoated state, only NiO gave an optical response to hydrogen gas. While the palladium coated NiO (Pd/NiO) sensor had the best response and recovery times of respectively 70 s and 206 s for 2% fraction of H-2 gas at 300 degrees C constant temperature, the Pd/WO3 sensor gave the best response time of 340 s. Palladium coating resulted in approximately 150% increase in the responses of the NiO sensors at higher H-2 concentration. The lower limit of H-2 sensing of the Pd/NiO sensors at 300 degrees C was at the H-2 fraction of 0.05%, while for Pd/WO3 sensors this value was 0.025%. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.ijhydene.2022.05.254
dc.identifier.endpage25464en_US
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue60en_US
dc.identifier.scopus2-s2.0-85132532501en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage25454en_US
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2022.05.254
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3364
dc.identifier.volume47en_US
dc.identifier.wosWOS:000890267400003en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofInternational Journal of Hydrogen Energyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectGas sensorsen_US
dc.subjectHydrogen sensorsen_US
dc.subjectOptical responseen_US
dc.subjectSurface energyen_US
dc.titleHigh optical response NiO, Pd/NiO and Pd/WO3 hydrogen sensorsen_US
dc.typeArticleen_US

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