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dc.creatorCecilia Mateos-Pedrero
dc.creatorDavid A. Pacheco Tanaka
dc.creatorAdélio Mendes
dc.creatorHugo Silva
dc.creatorCesar Magén
dc.description.abstractA simple urea-assisted hydrothermal synthesis method was used to tailor the physicochemical properties ofZnO materials. The role of Pluronic P123 block copolymer in the crystal growth, morphology and specificsurface area of the as-prepared ZnO was studied. When Pluronic P123 is used, well-dispersed hierarchicalmicrospheres, with a flower-like morphology, are obtained, but in its absence large spherical agglomeratedclusters are formed. The polarity of the ZnO, measured as the ratio between plane (002) and plane (100), isalso significantly higher for the Pluronic P123 sample. The influence of zinc salt precursors was alsoanalysed. The use of zinc nitrate led to the formation of urchin-like ZnO structures, instead of themicroflowers that result from zinc acetate salt. Despite having similar surface areas, the polarity of thezinc nitrate sample was much smaller. The decomposition of methylene blue corroborated the higherphotocatalytic activity of the ZnO materials with a higher proportion of polar planes (higher polarity). Theformation mechanism of the crystals is also suggested based on the observed gradual growth andassembly of the hydrozincite during the initial steps of the synthesis for the samples with and withoutPluronic P123.
dc.relationinfo:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/104217/2008/Integração de células de combustível de electrólito de membrana polimérica com membranas de paládio de elevada eficiência/PTDC/EQU-EQU/104217/2008
dc.relationinfo:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/303476/Integrated low temperature methanol steam reforming and high temperature polymer electrolyte membrane fuel cell/BeingEnergy
dc.relationinfo:eu-repo/grantAgreement/Autoriadade de Gestão do Programa Operacional Regional do Norte/Programas Integrados de IC&DT/NORTE-07-0124-FEDER-000026/Chemical Engineering: Process Optimization and Energy Conversion/LEPAE/CEFT - RL1
dc.subjectEngenharia química, Engenharia química
dc.subjectChemical engineering, Chemical engineering
dc.titleSimple hydrothermal synthesis method for tailoring the physicochemical properties of ZnO: Morphology, surface area and polarity
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.subject.fosCiências da engenharia e tecnologias::Engenharia química
dc.subject.fosEngineering and technology::Chemical engineering
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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