Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/103030
Author(s): Cecilia Mateos-Pedrero
David A. Pacheco Tanaka
Adélio Mendes
Hugo Silva
Cesar Magén
Title: Simple hydrothermal synthesis method for tailoring the physicochemical properties of ZnO: Morphology, surface area and polarity
Issue Date: 2014
Abstract: A 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.
Subject: Engenharia química, Engenharia química
Chemical engineering, Chemical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia química
Engineering and technology::Chemical engineering
URI: https://hdl.handle.net/10216/103030
Related Information: info: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
info: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
info: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
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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