Direct route for preparing multi-oxide inorganic nanocomposites of nanoparticles-decorated nanotubes

To address the need for new synthetic methods to prepare novel nanocomposites, here we present a direct route for preparing multi-oxide inorganic composites with specific architecture of nanoparticles decorating nanotubes. Our route involves cycles of impregnation of a metallo-organic precursor of n...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-02, Vol.774, p.1133-1139
Main Authors: Dias, Carlos Sato Baraldi, Garcia, Flávio, Mazali, Italo Odone, Cardoso, Mateus Borba, Martins de Souza e Silva, Juliana
Format: Article
Language:English
Subjects:
Catalysis
Decoration
Hematite
Inorganic chemistry
Inorganic nanocomposites
Iron-oxide
Metallography
Morphology
Multi-oxide
Nanocomposites
Nanoparticles
Nanotubes
Nickel-oxide
Organic chemistry
Precursors
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Summary:To address the need for new synthetic methods to prepare novel nanocomposites, here we present a direct route for preparing multi-oxide inorganic composites with specific architecture of nanoparticles decorating nanotubes. Our route involves cycles of impregnation of a metallo-organic precursor of nickel into hematite nanotubes and subsequently thermally decomposing it, that we named IDC. We characterized the nanotubes before and after ten sequential IDC. The obtained material is a composite of NiO nanoparticles grown onto the walls of hematite nanotubes. Hematite nanotubes are morphologic and chemically stable during the entire synthetic process. In the synthetic route tested by us, virtually any metallo-organic precursor/combinations of precursors can be used. Our method can be explored to obtain tailored nanocomposites consisting of nanoparticles with different oxides combinations decorating the walls of nanotubes, with potential use such as in catalysis and biomedicine. [Display omitted] •We present a method to prepare NiO nanoparticles decorating hematite nanotubes.•Nanoparticles grow preferentially on the inner-surface of the nanotubes.•Hematite nanotube is chemical and mechanically stable during the synthetic process.•Virtually any combination of oxides can be obtained using our synthetic method.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.09.358