TY - JOUR
T1 - Photocatalytic activity of structured mesoporous TiO2 materials
AU - Alvaro, Mercedes
AU - Aprile, Carmela
AU - Benitez, Miriam
AU - Carbonell Llopis, Esther
AU - García, Hermenegildo
PY - 2006/5/6
Y1 - 2006/5/6
N2 - Starting from colloidal TiO2 nanoparticles in combination with tetraethyl orthosilicate using neutral Pluronic or cationic cetyltrimethylammonium as templates, a series of structured mesoporous silicas has been obtained. The structure of the mesoporous titania was confirmed by isothermal gas adsorption, transmission electron microscopy, and X-ray diffraction. The pore diameter ranged between 3.8 and 10.9 nm, and the BET surface area varied from 99 to 584 m2 g-1. The photocatalytic activity of these samples for the degradation of phenol in aqueous solution has been compared with that of standard P-25 TiO2. Even though the activity of these new mesostructured materials is lower that those found for P-25 TiO2, the turnover frequency of the photocatalytic activity (moles of phenol degraded per Ti atom present at initial reaction time) is much higher for the mesoporous titania, particularly with low titanium contents for those materials (mpTiO2-5 and TiO 2-SBA15-5).
AB - Starting from colloidal TiO2 nanoparticles in combination with tetraethyl orthosilicate using neutral Pluronic or cationic cetyltrimethylammonium as templates, a series of structured mesoporous silicas has been obtained. The structure of the mesoporous titania was confirmed by isothermal gas adsorption, transmission electron microscopy, and X-ray diffraction. The pore diameter ranged between 3.8 and 10.9 nm, and the BET surface area varied from 99 to 584 m2 g-1. The photocatalytic activity of these samples for the degradation of phenol in aqueous solution has been compared with that of standard P-25 TiO2. Even though the activity of these new mesostructured materials is lower that those found for P-25 TiO2, the turnover frequency of the photocatalytic activity (moles of phenol degraded per Ti atom present at initial reaction time) is much higher for the mesoporous titania, particularly with low titanium contents for those materials (mpTiO2-5 and TiO 2-SBA15-5).
UR - http://www.scopus.com/inward/record.url?scp=33646345608&partnerID=8YFLogxK
U2 - 10.1021/jp0573240
DO - 10.1021/jp0573240
M3 - Article
AN - SCOPUS:33646345608
SN - 1520-6106
VL - 110
SP - 6661
EP - 6665
JO - The Journal of Physical Chemistry. B, Condensed matter, materials, surfaces, interfaces & biophysical
JF - The Journal of Physical Chemistry. B, Condensed matter, materials, surfaces, interfaces & biophysical
IS - 13
ER -