Toluene oxidation on titanium- and iron-modified MCM-41 materials.
J Hazard Mater
; 168(1): 226-32, 2009 Aug 30.
Article
in En
| MEDLINE
| ID: mdl-19269739
ABSTRACT
Iron- and titanium-modified MCM-41 materials, prepared by direct synthesis at ambient temperature or wet impregnation technique, were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), UV-vis diffuse reflectance, Mössbauer and FT-IR spectroscopies. Their catalytic behavior was studied in total oxidation of toluene. Materials with high surface area and well-ordered pore structure were obtained. The increase of the titanium content (up to 50%) in the bisubstituted, iron and titanium containing materials leads to partial structure collapse of the silica matrix. Finely dispersed anatase particles were also formed during the impregnation procedure. The catalytic activity of the bisubstituted materials was influenced by the method of their preparation, but higher catalytic stability could be achieved, compared to iron monosubstituted one. The nature of the catalytic active sites is discussed.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Toluene
/
Waste Disposal, Fluid
/
Silicon Dioxide
Language:
En
Journal:
J Hazard Mater
Journal subject:
SAUDE AMBIENTAL
Year:
2009
Document type:
Article
Affiliation country:
Bulgaria