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Journal of Nanoparticle Research

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01.10.2011 | Research Paper

Electrochemical synthesis of nanocrystalline zinc oxide and phase transformations of zinc hydroxides

verfasst von: Ingrid Grobelsek, Benjamin Rabung, Mario Quilitz, Michael Veith

Erschienen in: Journal of Nanoparticle Research | Ausgabe 10/2011

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Abstract

Nanoscaled ZnO was synthesized by an electrochemical process using zinc or Al-alloyed zinc electrodes in an aqueous system with acetic acid as a conductive salt. Depending on the synthetical parameters, the precipitated precursor solids were found to consist of various compounds such as zincite, presumably δ-Zn(OH)₂, β₁-Zn(OH)₂, ε-Zn(OH)₂, Zn₅(CO₃)₂(OH)₆ and, in case an Al-alloyed electrode was used for the synthesis, Zn_0.71Al_0.29(OH)₂ (CO₃)_0.145·xH₂O. The intermediate solids served as precursors for the subsequent thermal treatment resulting in zincite powders with various morphologies. Depending on the processing conditions, zincite was formed between 100 and 260 °C with a mean crystallite size between 6 and 25 nm. Selected zincite powders were pressed to pellets, sintered at temperatures between 900 and 1,100 °C and characterized by measurements of the electrical bulk conductivities, yielding values up to 1.69 S cm⁻¹ in samples with 1.24 wt% Al. Comparison with samples prepared by precipitation methods showed that the latter had values of up to 44 S cm⁻¹.

Vorheriger Artikel Polyol-thermal synthesis of silver nanowires for Hg2+ sensing detection

Nächster Artikel Comparison of the photosensitivity and bacterial toxicity of spherical and tubular fullerenes of variable aggregate size

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Titel: Electrochemical synthesis of nanocrystalline zinc oxide and phase transformations of zinc hydroxides
verfasst von: Ingrid Grobelsek
Benjamin Rabung
Mario Quilitz
Michael Veith
Publikationsdatum: 01.10.2011
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 10/2011
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-011-0490-0

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