Characterization and application of nanostructured films containing Au and TiO2 nanoparticles supported in bacterial cellulose

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dc.contributor.authorDal'Acqua, Nicolle
dc.contributor.authorMattos, Alessandra Batista de
dc.contributor.authorKrindges, Israel
dc.contributor.authorPereira, Marcelo Barbalho
dc.contributor.authorBarud, Hernane da Silva [UNESP]
dc.contributor.authorLima Ribeiro, Sidney Jose [UNESP]
dc.contributor.authorSilva Duarte, Gian Carlos
dc.contributor.authorRadtke, Claudio
dc.contributor.authorAlmeida, Luciano Costa
dc.contributor.authorGiovanela, Marcelo
dc.contributor.authorCrespo, Janaina da Silva
dc.contributor.authorMachado, Giovanna
dc.contributor.institutionUCS
dc.contributor.institutionCETENE
dc.contributor.institutionUniersidade Federal do Rio Grande do Su (UFRGS)l
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Pernambuco (UFPE)
dc.date.accessioned2015-10-22T06:33:49Z
dc.date.available2015-10-22T06:33:49Z
dc.date.issued2015-01-08
dc.description.abstractIn the last several years, the use of renewable energy sources has increased; consequently, the number of studies regarding their efficiency has also increased. It is well known that fossil and atomic fuels will not last forever and that their use contributes to environmental pollution. Thus, nanostructured thin films have attracted attention due to numerous applications, including construction of photovoltaic energy generating and photoluminescence materials. Therefore, in this study, we prepared and characterized thin films supported on bacterial cellulose that were produced using the layer-by-layer (LbL) technique. The weak polyelectrolytes, such as poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA), combined with titanium dioxide (TiO2) and gold nanoparticles (Au NPs) were used to produce flexible devices capable of producing hydrogen gas (H-2) by photocatalysis. The presence of the Au NPs and TiO2 in the films was confirmed using UV-vis spectroscopy, Rutherford backscattering spectrometry, and X-ray diffraction. Scanning electron microscopy was used to evaluate the surface morphology of the films, and the distribution and average size of the Au NPs were analyzed using transmission electron microscopy, which revealed sizes in the nanometer range. Finally, the thin films were analyzed using gas chromatography to evaluate the H-2 production by photocatalysis. Overall, the system with (PAH + TiO2) and PAA solutions at pH = 4.0 in the presence of gold salt that were reduced with ultraviolet light were more efficient due to their greater interactions with the TiO2 during multilayer deposition.en
dc.description.affiliationUniversidade de Caixas do Sul (UCS), Caxias do Sul, RS, Brasil
dc.description.affiliationCentro de Tecnogias Estratégicas do Nordeste (CETENE), Recife, PE, Brasil
dc.description.affiliationUniversidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brasil
dc.description.affiliationUniversidade Estadual Paulista (UNESP), Araraquara, SP, Brasil
dc.description.affiliationUniversidade Federal de Pernambuco (UFPE), Recife, PE, Brasil
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP), Araraquara, SP, Brasil
dc.description.sponsorshipCentro de Tecnologias Estratégicas do Nordeste (CETENE)
dc.description.sponsorshipFundação de Amparo à Ciência e Tecnologia de Pernambuco (FACEPE)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent340-349
dc.identifierhttp://pubs.acs.org/doi/abs/10.1021/jp509359b
dc.identifier.citationJournal Of Physical Chemistry C. Washington: Amer Chemical Soc, v. 119, n. 1, p. 340-349, 2015.
dc.identifier.doi10.1021/jp509359b
dc.identifier.issn1932-7447
dc.identifier.urihttp://hdl.handle.net/11449/129704
dc.identifier.wosWOS:000347744700037
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofJournal Of Physical Chemistry C
dc.relation.ispartofjcr4.484
dc.relation.ispartofsjr2,135
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleCharacterization and application of nanostructured films containing Au and TiO2 nanoparticles supported in bacterial celluloseen
dc.typeArtigo
dcterms.rightsHolderAmer Chemical Soc
unesp.author.orcid0000-0002-9058-3056[12]
unesp.author.orcid0000-0003-0874-383X[10]
unesp.author.orcid0000-0003-3469-4920[8]
unesp.author.orcid0000-0002-7141-5620[9]
unesp.author.orcid0000-0002-8162-6747[6]

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