Gas Sensing Properties of p-Co3O4/n-TiO2 Nanotube Heterostructures

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dc.contributor.authorAlev, Onur
dc.contributor.authorKilic, Alp
dc.contributor.authorCakirlar, Cigdem
dc.contributor.authorBuyukkose, Serkan
dc.contributor.authorOrturk, Zafer Ziya
dc.date.accessioned2025-10-29T11:08:43Z
dc.date.issued2018
dc.departmentFakülteler, Temel Bilimler Fakültesi, Fizik Bölümü
dc.description.abstractIn this paper, we fabricated p-Co3O4/n-TiO2 heterostructures and investigated their gas sensing properties. The structural and morphological characterization were performed by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy analysis (XPS). The electrical properties of the heterostructure were studied within the temperature range from 293 K to 423 K. Changes in electrical properties and sensing behavior against reducing and oxidizing gases were attributed to the formation of p-n heterojunctions at the Co3O4 and TiO2 interface. In comparison with sensing performed with pristine TiO2 nanotubes (NTs), a significant improvement in H-2 sensing at 200 degrees C was observed, while the sensing response against NO2 decreased for the heterostructures. Additionally, a response against toluene gas, in contrast to pristine TiO2 NTs, appeared in the Co3O4/TiO2 heterostructure samples.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [116M201]
dc.description.sponsorshipThe authors would like to thank Leyla Colakerol Arslan for XPS work and Derya Atac for deep discussion on XPS data. This research was performed within the 116M201 project financed by the Scientific and Technological Research Council of Turkey (TUBITAK).
dc.identifier.doi10.3390/s18040956
dc.identifier.issn1424-8220
dc.identifier.issue4
dc.identifier.orcid0000-0003-2065-2965
dc.identifier.orcid0000-0002-2882-2802
dc.identifier.orcid0000-0002-9751-1522
dc.identifier.scopus2-s2.0-85044463617
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3390/s18040956
dc.identifier.urihttps://hdl.handle.net/20.500.14854/5482
dc.identifier.volume18
dc.identifier.wosWOS:000435574800028
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofSensors
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20251020
dc.subjectmetal-oxide
dc.subjectgas sensor
dc.subjectnanostructures
dc.subjectheterostructure
dc.subjectnanotubes
dc.subjectTiO2
dc.subjectCo3O4
dc.titleGas Sensing Properties of p-Co3O4/n-TiO2 Nanotube Heterostructures
dc.typeArticle

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