Photocatalytic oxidation of gaseous toluene on titania/mesoporous silica powders in a fluidized-bed reactor

0359746 - ÚFCH JH 2012 RIV NL eng J - Článek v odborném periodiku
Tasbihi, M. - Štangar, U. L. - Černigoj, U. - Jirkovský, Jaromír - Bakardjieva, Snejana - Tušar, N. N.
Photocatalytic oxidation of gaseous toluene on titania/mesoporous silica powders in a fluidized-bed reactor.
Catalysis Today. Roč. 161, č. 1 (2011), s. 181-188. ISSN 0920-5861. E-ISSN 1873-4308
Výzkumný záměr: CEZ:AV0Z40400503; CEZ:AV0Z40320502
Klíčová slova: titanium dioxide * mesoporous silica * photocatalysis
Kód oboru RIV: CG - Elektrochemie; CA - Anorganická chemie (UACH-T)
Impakt faktor: 3.407, rok: 2011

The photocatalytic degradation of toluene was carried out on titania/mesoporous silica photocatalysts in a self-constructed gaseous fluidized-bed photoreactor equipped with UVA light source. The powder photocatalysts were synthesized by incorporation of aqueous titania sol (as a photoactive component), into silica mesoporous materials (as a high-surface-area support), via the sol-gel impregnation method. SBA-15 was used as an ordered and KIL-2 as a disordered mesoporous silica support. The Ti/Si nominal molar ratio was adjusted to 1/2, 1/1 and 2/1. The photocatalysts were characterized by X-ray diffraction (XRD), nitrogen sorption (BET), UV-vis-NIR diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FT-IR) and high-resolution transmission electron microscopy (HR-TEM). The effects of Ti/Si molar ratio and of the mesoporous silica structure were investigated measuring adsorption capacity and photocatalytic degradation of toluene.
Trvalý link: http://hdl.handle.net/11104/0197468