Počet záznamů: 1

Preparation and characterization of ZnS nanoparticles deposited on montmorillonite

  1. 1.
    0358016 - UACH-T 2011 RIV US eng J - Článek v odborném periodiku
    Kozák, O. - Praus, P. - Kočí, K. - Klementová, Mariana
    Preparation and characterization of ZnS nanoparticles deposited on montmorillonite.
    Journal of Colloid and Interface Science. Roč. 352, č. 2 (2010), s. 244-251 ISSN 0021-9797
    Výzkumný záměr: CEZ:AV0Z40320502
    Klíčová slova: ZnS nanoparticles * montmorillonite * photoluminescence * photocatalysis * carbon dioxide
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 3.068, rok: 2010

    ZnS nanoparticles were prepared and deposited on montmorillonite (MMT) in the presence of cetyltri-methylammonium (CTA) UV spectrometry and transmission electron microscopy (TEM) proved the formation of nanoparticles with diameters ranging from 3 nm to 5 nm Selected area electron diffraction (SAED) patterns revealed the presence of romboedric ZnS The band gap energy of nanosize ZnS was estimated at 3 89 +/- 0 03 eV Photoluminescence spectra exhibited a strong emission band between 300 nm and 600 nm explained by the vacant ZnS nanostructure. The prepared ZnS-montmorillonite nanocomposite (ZnS-MMT) was used for the photocatalytic reduction of CO2 providing a considerably high efficiency that exceeded 5-6 fold the results of commercial TiO2 Degussa P25. The stability of ZnS against oxidation was confirmed by the determination of sulphate using capillary isotachophoresis.
    Trvalý link: http://hdl.handle.net/11104/0196167