Effective reduced graphene oxide sheets/hierarchical flower-like NiO composites for methanol sensing under high humidity

dc.contributor.authorZito, Cecilia A. [UNESP]
dc.contributor.authorPerfecto, Tarcísio M. [UNESP]
dc.contributor.authorFonseca, Cristiane S. [UNESP]
dc.contributor.authorVolanti, Diogo P. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T16:53:48Z
dc.date.available2018-12-11T16:53:48Z
dc.date.issued2018-01-01
dc.description.abstractRecent advances in NiO-based gas sensors have been reported, but high working temperatures and dry conditions are usually required. Herein, we report the volatile organic compound (VOC) sensing performance of flower-like (FL) NiO hierarchical structures modified with reduced graphene oxide (RGO) sheets under high humidity. RGO/FL-NiO composites were synthesized by a simple and template-free microwave-assisted hydrothermal method and subsequent calcination at 250 °C. The VOC-sensing properties were investigated for several VOCs, such as acetone, ethanol, methanol, m-xylene, and toluene, at 90% relative humidity. The RGO/FL-NiO composites exhibited a decrease in the optimal operating temperature and enhanced methanol responses compared to pure FL-NiO. In addition, the 5% RGO/FL-NiO composite exhibited the highest response of 61.51% to 100 ppm of methanol at 180 °C, which was 1.4-9.9 times superior to responses to other VOCs, indicating the sensor's great selectivity. The improved methanol sensing properties could be attributed to the NiO/RGO heterointerface.en
dc.description.affiliationLaboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo 2265
dc.description.affiliationUnespLaboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo 2265
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2013/23886-4
dc.description.sponsorshipIdFAPESP: 2016/04371-1
dc.description.sponsorshipIdFAPESP: 2016/25267-8
dc.description.sponsorshipIdFAPESP: 2017/01267-1
dc.description.sponsorshipIdCNPq: 444926/2014-3
dc.format.extent8638-8645
dc.identifierhttp://dx.doi.org/10.1039/c8nj01061g
dc.identifier.citationNew Journal of Chemistry, v. 42, n. 11, p. 8638-8645, 2018.
dc.identifier.doi10.1039/c8nj01061g
dc.identifier.issn1369-9261
dc.identifier.issn1144-0546
dc.identifier.lattes2354739980406725
dc.identifier.orcid0000-0001-9315-9392
dc.identifier.scopus2-s2.0-85047984994
dc.identifier.urihttp://hdl.handle.net/11449/171078
dc.language.isoeng
dc.relation.ispartofNew Journal of Chemistry
dc.relation.ispartofsjr0,864
dc.relation.ispartofsjr0,864
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleEffective reduced graphene oxide sheets/hierarchical flower-like NiO composites for methanol sensing under high humidityen
dc.typeArtigo
unesp.author.lattes2354739980406725[4]
unesp.author.orcid0000-0001-9315-9392[4]

Arquivos

Coleções