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dc.contributor.authorPerini, João Angelo Lima [UNESP]
dc.contributor.authorTorquato, Lilian D. Moura [UNESP]
dc.contributor.authorIrikura, Kallyni [UNESP]
dc.contributor.authorZanoni, Maria Valnice Boldrin [UNESP]
dc.date.accessioned2019-10-06T17:19:04Z
dc.date.available2019-10-06T17:19:04Z
dc.date.issued2019-12-01
dc.identifierhttp://dx.doi.org/10.1016/j.jcou.2019.08.006
dc.identifier.citationJournal of CO2 Utilization, v. 34, p. 596-605.
dc.identifier.issn2212-9820
dc.identifier.urihttp://hdl.handle.net/11449/190613
dc.description.abstractTiO2 nanotube (NT) arrays were modified with thin films of polydopamine (PDA) and Ag nanoparticles (NP) and were used as electron storage centers on a photoelectrode surface, in order to drive the reduction of CO2 to methanol. Silver nanoparticles were obtained by means of chemical deposition using the catechol groups present in PDA. The Ti/TiO2NT@PDA-AgNP photocathode presented higher photocurrents when irradiated using either UV-vis irradiation or a solar simulator, compared to bare Ti/TiO2NT, indicating improvement of charge carrier separation, while the band gap of the material decreased from 3.12 to 2.3 eV. Under optimized conditions, methanol production of 59.5 μM cm-2 was achieved and under the solar simulator, 19.25 μM cm-2 of methanol was generated, indicating that the PDA-AgNP coating improved the activation by visible light. The Ag present in the modified Ti/TiO2NT electrodes was quantified during photoelectrocatalysis, with the amount of Ag nanoparticles released from the electrodes being negligible. A schematic representation of the charge transfer mechanism at the Ti/TiO2NT@PDA-AgNP electrode is provided.en
dc.format.extent596-605
dc.language.isoeng
dc.relation.ispartofJournal of CO2 Utilization
dc.sourceScopus
dc.subjectCO2 reduction
dc.subjectDopamine
dc.subjectPhotoelectrocatalysis
dc.subjectSilver
dc.subjectSolar simulator
dc.titleAg/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanolen
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationSão Paulo State University (UNESP) Institute of Chemistry
dc.description.affiliationNational Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) São Paulo State University (UNESP)
dc.description.affiliationUnespSão Paulo State University (UNESP) Institute of Chemistry
dc.description.affiliationUnespNational Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) São Paulo State University (UNESP)
dc.identifier.doi10.1016/j.jcou.2019.08.006
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-85071427009
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