Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/49763

TítuloZinc nanostructures for oxygen scavenging
Autor(es)Calderon, V. S.
Gomes, B.
Ferreira, P. J.
Carvalho, S.
Data2017
EditoraRoyal Society of Chemistry (RSC)
RevistaNanoscale
Resumo(s)In this work, oxidation of carbon supported Zn nanostructures was studied to elucidate their utilization as oxygen scavenging materials activated by the relative humidity in the environment. Moisture-activated nano-scavengers were produced on carbon substrates using magnetron sputtering attaining nano-islands (nanoparticles), randomly distributed on the carbon surface, with arbitrary crystallographic orientations. They possess a Zn–ZnO core–shell structure, caused by surface passivation, which provides them with a self-assembled protective layer that prevents complete oxidation of nanoparticles prior to utilization. The oxidation rate is independent of the nanoparticle size and orientation, for particles between 5 and 18 nm. The oxidation kinetics are not in complete agreement with the Cabrera and Mott theory. When exposed to a high relative humidity environment, an acceleration in the oxidation process is observed, dissolving the Zn nanoparticles and forming a layer on the carbon, which facilitates the consumption of the Zn to form ZnO. These results support the idea of its potential use in applications where high RH environments are required, such as food packaging.
Tipoarticle
URIhttp://hdl.handle.net/1822/49763
DOI10.1039/C7NR01367A
ISSN2040-3364
e-ISSN2040-3372
Arbitragem científicayes
AcessorestrictedAccess
Aparece nas coleções:CDF - GRF - Artigos/Papers (with refereeing)

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Zinc nanostructures for oxygen scavenging.pdf9,19 MBAdobe PDFVer/Abrir  Solicitar cópia ao autor!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis