Influence of the preparation method on the morphology of templated NiCo2O4 spinel
| Autor: | Emma Rossinyol, P. Solsona, Onofre Castell, Moisés Cabo, Maria Dolors Baró, Eva Pellicer, Santiago Suriñach |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Thermal decomposition Spinel Nanoparticle chemistry.chemical_element Bioengineering Nanotechnology General Chemistry engineering.material Condensed Matter Physics Evaporation (deposition) Atomic and Molecular Physics and Optics law.invention Nickel chemistry Chemical engineering law Modeling and Simulation engineering General Materials Science Calcination Mesoporous material Cobalt |
| Zdroj: | Journal of Nanoparticle Research. 13:3671-3681 |
| ISSN: | 1572-896X 1388-0764 |
| Popis: | The synthesis of NiCo2O4 spinel by several nanocasting strategies (i.e., multi-step nanocasting, one-step nanocasting and soft-templating), in which nickel and cobalt nitrates are used as precursors and Pluronic P123 as surfactant, is explored. First, in the multi-step nanocasting, the effect of the impregnation method (evaporation, solid–liquid and two-solvent) of the SBA-15 silica template on the morphology of NiCo2O4 replica is investigated. The evaporation method seems to be the best choice to obtain mesoporous NiCo2O4 powder which, after calcination at 375 °C and subsequent template removal, displays the highest surface area (93.1 m2/g). We have also checked the feasibility of the one-step nanoscating approach for the synthesis of ordered NiCo2O4 arrays, though this methodology entails severe difficulties, mainly related to the different decomposition temperature of the nitrate precursors and the P123 surfactant. Finally, randomly oriented, aggregated NiCo2O4 nanoparticles are obtained by means of P123 surfactant-assisted soft-templating approach. |
| Databáze: | OpenAIRE |
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