Structural Analysis of Aluminum Oxyhydroxide Aerogel by Small Angle X-Ray Scattering

  • A. N. KhodanEmail author
  • G. P. Kopitsa
  • Kh. E. Yorov
  • A. E. Baranchikov
  • V. K. Ivanov
  • A. Feoktystov
  • V. Pipich


The work presents studies on the microstructure and mesostructure of nanostructured aluminum oxyhydroxide formed as a high porous monolithic material through the surface oxidation of aluminum liquidmetal solution in mercury in a temperature- and humidity-controlled air atmosphere. The methods of X-ray diffraction analysis, thermal analysis, the low temperature adsorption of nitrogen vapors, transmission electron microscopy, small-angle and very small-angle neutron scattering, and small-angle X-ray scattering are used for comprehensive investigation of the samples synthesized at 25°С as well as that annealed at temperatures up to 1150°C. It is found that the structure of the monolithic samples can be described within the framework of a three-level model involving primary heterogeneities (typical length scale of rc ≈ 9–19 Å), forming fibrils (cross-sectional radius R ≈ 36–43 Å and length L ≈ 3200–3300 Å) or lamellae (thickness T ≈ 110 Å and width W ≈ 3050 Å) which, in turn, are integrated into large-scale aggregates (typical size R c ≈ 1.25–1.4 μm) with an insignificant surface roughness. It is shown that a high specific surface (~200 m2/g) typical for the initial sample is maintained upon its thermal annealing up to 900°С, and it decreases to 100 m2/g after heat treatment at 1150°С due to fibrillary agglomeration.


nanostructured aluminum oxyhydroxide aerogels small-angle neutron scattering small-angle X-ray scattering 


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. N. Khodan
    • 1
    Email author
  • G. P. Kopitsa
    • 2
    • 3
  • Kh. E. Yorov
    • 4
  • A. E. Baranchikov
    • 5
  • V. K. Ivanov
    • 5
    • 6
  • A. Feoktystov
    • 7
  • V. Pipich
    • 7
  1. 1.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  2. 2.Konstantinov Petersburg Nuclear Physics InstituteNational Research Center “Kurchatov Institute”GatchinaRussia
  3. 3.Grebenshchikov Institute of Silicate ChemistryRussian Academy of SciencesSt.-PetersburgRussia
  4. 4.Moscow State UniversityMoscowRussia
  5. 5.Kurnakov Institute of General and Inorganic ChemistryRussian Academy of SciencesMoscowRussia
  6. 6.National Research Tomsk State UniversityTomskRussia
  7. 7.Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation at MLZGarchingGermany

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