Synthesis of Ge-imogolite: influence of the hydrolysis ratio on the structure of the nanotubes

Levard Clément, Masion Armand, Rose Jérôme, Doelsch Emmanuel, Borschneck Daniel, Olivi Luca, Chaurand Perrine, Dominici Christian, Ziarelli Fabio, Thill Antoine, Maillet Perrine, Bottero Jean Yves. 2011. Synthesis of Ge-imogolite: influence of the hydrolysis ratio on the structure of the nanotubes. PCCP. Physical Chemistry Chemical Physics, 13 (32) : pp. 14516-14522.

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Abstract : The synthesis protocol for Ge-imogolite (aluminogermanate nanotubes) consists of 3 main steps: base hydrolysis of a solution of aluminum and germanium monomers, stabilization of the suspension and heating at 95 °C. The successful synthesis of these nanotubes was found to be sensitive to the hydrolysis step. The impact of the hydrolysis ratio (from nOH/nAl = 0.5 to 3) on the final product structure was examined using a combination of characterization tools. Thus, key hydrolysis ratios were identified: nOH/nAl = 1.5 for the formation of nanotubes with structural defects, nOH/nAl = 2 for the synthesis of a well crystallized Ge imogolite and nOH/nAl > 2.5 where nanotube formation is hindered. The capability of controlling the degree of the nanotube's crystallinity opens up interesting opportunities in regard to new potential applications. (Résumé d'auteur)

Mots-clés Agrovoc : Structure chimique, Synthèse chimique

Mots-clés complémentaires : Nanotube

Classification Agris : 000 - Other themes

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

  • Levard Clément, Université d'Aix-Marseille (FRA)
  • Masion Armand, Université d'Aix-Marseille (FRA)
  • Rose Jérôme, Université d'Aix-Marseille (FRA)
  • Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296
  • Borschneck Daniel, Université d'Aix-Marseille (FRA)
  • Olivi Luca, ELETTRA (ITA)
  • Chaurand Perrine, Université d'Aix-Marseille (FRA)
  • Dominici Christian, Université d'Aix-Marseille (FRA)
  • Ziarelli Fabio, CNRS (FRA)
  • Thill Antoine, CEA (FRA)
  • Maillet Perrine, CEA (FRA)
  • Bottero Jean Yves, Université d'Aix-Marseille (FRA)

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