Počet záznamů: 1

Preparation of Silver-Montmorillonite Nanocomposites by Reduction with Formaldehyde and Borohydride

  1. 1.
    0340426 - UACH-T 2010 RIV BR eng J - Článek v odborném periodiku
    Praus, P. - Turicová, M. - Klementová, Mariana
    Preparation of Silver-Montmorillonite Nanocomposites by Reduction with Formaldehyde and Borohydride.
    Journal of the Brazilian Chemical Society. Roč. 20, č. 7 (2009), s. 1351-1357 ISSN 0103-5053
    Výzkumný záměr: CEZ:AV0Z40320502
    Klíčová slova: silver * nanocomposites * montmorillonite * reduction
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 1.458, rok: 2009

    Na-rich montmorillonite (MMT) was intercalated with silver cations, which were subsequently reduced with formaldehyde or sodium borohydride. The silver-montmorillonite nanocomposites were studied by UV-visible spectrometry, transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The influence of different reducing agents on the dispersity and size of silver particles deposited on montmorillonite surface was investigated. The reduction with borohydride gives rise to uniformly dispersed silver particles with a narrow particle size distribution from 3 nm to 13 nm. Formaldehyde reduction forms unevenly dispersed particles with a much wider size distribution, ranging from 3 to 100 nm. In addition, some Ag2O particles were found among silver particles prepared with formaldehyde, likely as a result of incomplete reduction.
    Trvalý link: http://hdl.handle.net/11104/0183664