Superior performance of rGO-tin oxide nanocomposite for selective reduction of CO2to methanol

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dc.contributor.authorRomeiro, F. C. [UNESP]
dc.contributor.authorSilva, B. C. [UNESP]
dc.contributor.authorMartins, A. S. [UNESP]
dc.contributor.authorZanoni, M. V.B. [UNESP]
dc.contributor.authorOrlandi, M. O. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-06-25T10:23:09Z
dc.date.available2021-06-25T10:23:09Z
dc.date.issued2021-04-01
dc.description.abstractThis study reports on the photoelectrochemical reduction of CO2 to methanol using Sn3O4 and reduced graphene oxide-tin oxide (rGO-Sn) nanocomposite synthesized through the microwave-assisted hydrothermal method. The resulting rGO-Sn nanocomposite exhibited enhanced activity and good stability during photoelectrochemical CO2 reduction explained by Z-scheme electron transport. Graphene oxide (GO) has played a crucial role in the chemical composition and morphology of nanocomposites. The interaction between GO and Sn2+ ions during synthesis promoted the formation of the SnO2 phase in the nanocomposite, thus generating mixed rGO/Sn3O4/SnO2 phases (the rGO-Sn nanocomposite). Remarkable selectivity for CO2/methanol conversion was obtained for both Sn3O4 and the nanocomposite at different potentials, in which the nanocomposite presented the highest conversion to methanol with a faradaic efficiency of 45 % at -0.3 V vs. Ag/AgCl. The improved activity of the nanocomposite was ascribed to the efficient use of solar energy (UV + visible light), to the decrease in electronic recombination in nanocomposite, which enabled an efficient electron-hole separation on the surface of the nanocomposite, and to the presence of rGO being combined with Sn3O4 and SnO2 structures, which ensured a faster charge transport rate. This study reveals the potential of rGO-Sn nanocomposites as photocathodic material for solar-to-chemical energy conversion.en
dc.description.affiliationSão Paulo State University (UNESP) Institute of Chemistry, Araraquara. 55 Prof. Francisco Degni St
dc.description.affiliationUnespSão Paulo State University (UNESP) Institute of Chemistry, Araraquara. 55 Prof. Francisco Degni St
dc.identifierhttp://dx.doi.org/10.1016/j.jcou.2021.101460
dc.identifier.citationJournal of CO2 Utilization, v. 46.
dc.identifier.doi10.1016/j.jcou.2021.101460
dc.identifier.issn2212-9820
dc.identifier.scopus2-s2.0-85101071319
dc.identifier.urihttp://hdl.handle.net/11449/205901
dc.language.isoeng
dc.relation.ispartofJournal of CO2 Utilization
dc.sourceScopus
dc.subjectCO2reduction
dc.subjectMicrowave-assisted hydrothermal method
dc.subjectPhotoelectrochemical properties
dc.subjectReduced graphene oxide
dc.subjectSn3O4
dc.titleSuperior performance of rGO-tin oxide nanocomposite for selective reduction of CO2to methanolen
dc.typeArtigo

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