Excellent detection of H2S gas at ppb concentrations using ZnFe2O4 nanofibers loaded with reduced graphene oxide

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dc.contributor.authorVan Hoang, Nguyenko
dc.contributor.authorHung, Chu Manhko
dc.contributor.authorHoa, Nguyen Ducko
dc.contributor.authorVan Duy, Nguyenko
dc.contributor.authorPark, Inkyuko
dc.contributor.authorVan Hieu, Nguyenko
dc.date.accessioned2019-01-23T06:53:02Z-
dc.date.available2019-01-23T06:53:02Z-
dc.date.created2019-01-21-
dc.date.issued2019-03-
dc.identifier.citationSENSORS AND ACTUATORS B-CHEMICAL, v.282, pp.876 - 884-
dc.identifier.issn0925-4005-
dc.identifier.urihttp://hdl.handle.net/10203/250079-
dc.description.abstractCost-effective fabrication of sensors and detection of ultralow concentrations of toxic gases are important concerns for environmental monitoring. In this study, the reduced graphene oxide (RGO)-loaded ZnFe2O4 nanofibers (ZFO-NFs) were fabricated by facile on-chip electrospinning method and subsequent heat treatment. The multi-porous NFs with single-phase cubic spinel structure and typical spider-net morphology were directly assembled on Pt-interdigitated electrodes. The diameters of the RGO-loaded ZFO-NFs were approximately 50-100 nm with many nanograins. The responses to H2S gas showed a bell-shaped behaviour with respect to RGO contents and annealing temperatures. The optimal values of the RGO contents and the annealing temperatures were found to be about 1.0 wt% and 600 degrees C, respectively. The response of the RGO-loaded ZnFe2O4 NFs to 1 ppm H2S gas was as high as 147 at 350 degrees C while their cross-gas responses to SO2 (10 ppm), NH3 (100 ppm), H-2 ( 250 ppm), C3H6O (1000 ppm), and C2H5OH (1000 ppm) were rather low (1.8 - 5.6). The high sensor response was attributed to formation of a heterojunction between RGO and ZnFe2O4 and due to the fact that NFs consisted of many nanograins which resulted in multi-porous structure and formation of potential barriers at grain boundaries.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE SA-
dc.titleExcellent detection of H2S gas at ppb concentrations using ZnFe2O4 nanofibers loaded with reduced graphene oxide-
dc.typeArticle-
dc.identifier.wosid000455090000105-
dc.identifier.scopusid2-s2.0-85057467577-
dc.type.rimsART-
dc.citation.volume282-
dc.citation.beginningpage876-
dc.citation.endingpage884-
dc.citation.publicationnameSENSORS AND ACTUATORS B-CHEMICAL-
dc.identifier.doi10.1016/j.snb.2018.11.157-
dc.contributor.localauthorPark, Inkyu-
dc.contributor.nonIdAuthorVan Hoang, Nguyen-
dc.contributor.nonIdAuthorHung, Chu Manh-
dc.contributor.nonIdAuthorHoa, Nguyen Duc-
dc.contributor.nonIdAuthorVan Duy, Nguyen-
dc.contributor.nonIdAuthorVan Hieu, Nguyen-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
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