Silica Supporting Nickel Nanoparticles Prepared by a Sol-Gel Method

  1. Prof. Dr. M. Rühle2 and
  2. Prof. Dr. H. Gleiter3
  1. Guido Ennas,
  2. Giaime Marongiu,
  3. Giorgio Paschina,
  4. Giorgio Piccaluga and
  5. Stefano Solinas

Published Online: 23 DEC 2005

DOI: 10.1002/352760622X.ch30

Interface Controlled Materials, Volume 9

Interface Controlled Materials, Volume 9

How to Cite

Ennas, G., Marongiu, G., Paschina, G., Piccaluga, G. and Solinas, S. (2000) Silica Supporting Nickel Nanoparticles Prepared by a Sol-Gel Method, in Interface Controlled Materials, Volume 9 (eds M. Rühle and H. Gleiter), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/352760622X.ch30

Editor Information

  1. 2

    Max-Planck-Institut für Metallforschung, Seestraße 92, 70174 Stuttgart, Germany

  2. 3

    Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany

Author Information

  1. Università degli Studi di Cagliari - Dipartimento di Scienze Chimiche - 09100 Cagliari (ITALY)

Publication History

  1. Published Online: 23 DEC 2005
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301911

Online ISBN: 9783527606221

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Keywords:

  • interface controlled materials;
  • nickel-SiO2 nanocomposites;
  • sol-gel method

Summary

Nickel-SiO2 nanocomposites with nickel content equal to 14 wt% were prepared by sol-gel method starting from ethanolic (EtOH) solutions of tetraethoxysilane (TEOS) and nickel nitrate hexahydrate. After gelation the samples were thermally treated and then reduced in hydrogen flow at selected temperatures. TEOS/EtOH/H2O molar ratios (TEH), pH and gelation temperature of the gels (Tgel) have been varied within selected ranges in order to optimize the average particle size (<D>) and their size distribution.

The amorphous/crystalline nature of the materials, the occurrence of recognizable phases, and the size and size distribution of the particles were examined by x-ray diffraction (XRD) and transmission electron microscopy (TEM). The thermal behavior was followed by thermal analysis (TGA).

Very small nickel nanoparticles with average crystal size of 3 nm with a narrow size distribution have been obtained. The preparation of the sol and the treatments of the fresh gels are possible keys to control the final product.