Počet záznamů: 1

Photocatalytic properties of aqueous systems containing TiO2 nanoparticles

  1. 1.
    0359747 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Paušová, Š. - Krýsa, J. - Jirkovský, Jaromír - Forano, C. - Prevot, V. - Mailhot, G.
    Photocatalytic properties of aqueous systems containing TiO2 nanoparticles.
    Catalysis Today. Roč. 161, č. 1 (2011), s. 140-146 ISSN 0920-5861
    Grant CEP: GA MŠk 1M0577
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: TiO2 nanoparticles * photocatalysis * aging
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 3.407, rok: 2011

    This work describes the aging of aqueous colloidal TiO2 nanoparticles at different temperatures and pH values. Emphasis was particularly given to the behaviour in the alkaline region, since this has not yet been properly reported. Aging of colloidal TiO2 suspensions has previously been investigated using spectroscopic methods (band gap energy determination) and a dynamic light scattering method (particle size determination). The photocatalytic activity, representing the most important property of TiO2 nanoparticles, was determined through the quantum yield of 4-chlorophenol degradation. It was found that the size of acidic colloidal TiO2 particles depends on the storing temperature; lower temperature leads to a small increase in particle size. The process of aging of TiO2 nanoparticles consists in slow re-crystallization that leads to slightly larger particles, and it seems that this process is faster at higher temperatures.
    Trvalý link: http://hdl.handle.net/11104/0197469