Influence of the preparation method on the morphology of templated NiCo sub(2)O sub(4) spinel

The synthesis of NiCo sub(2)O sub(4) 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 e...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2011-09, Vol.13 (9), p.3671-3681
Main Authors: Cabo, Moises, Pellicer, Eva, Rossinyol, Emma, Solsona, Pau, Castell, Onofre, Surinach, Santiago, Baro, Maria Dolors
Format: Article
Language:English
Subjects:
Evaporation
Morphology
Nanocomposites
Nanomaterials
Nanostructure
Precursors
Surfactants
Synthesis
Online Access:Get full text
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Summary:The synthesis of NiCo sub(2)O sub(4) 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 NiCo sub(2)O sub(4) replica is investigated. The evaporation method seems to be the best choice to obtain mesoporous NiCo sub(2)O sub(4) powder which, after calcination at 375 degree C and subsequent template removal, displays the highest surface area (93.1 m super(2)/g). We have also checked the feasibility of the one-step nanoscating approach for the synthesis of ordered NiCo sub(2)O sub(4) 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 NiCo sub(2)O sub(4) nanoparticles are obtained by means of P123 surfactant-assisted soft-templating approach.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-011-0287-1