Photocatalytic oxidation of organic pollutants on titania-clay composites.
Chemosphere
; 70(3): 538-42, 2008 Jan.
Article
in En
| MEDLINE
| ID: mdl-17698167
ABSTRACT
TiO2/Ca-montmorillonite composites were prepared by wet grinding in an agate mill. Positively charged TiO2 nanoparticles are bound to the surface of the negatively charged montmorillonite layers via heterocoagulation; the clay mineral is used as adsorbent and support for the photooxidation process. Aquatic solution of 0.5mM phenol was degraded by irradiation with UV-VIS light (lambda=250-440 and 540-590 nm) in suspensions of TiO2-clay composites and significant photodegradation was observed at 40-60% TiO2/Ca-montmorillonite compositions. Synergistic effect was detected at solid/liquid interface for degradation of phenol and at solid/gas interface in the recycling flow reactors for photooxidation of ethanol and toluene vapors.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Titanium
/
Water Pollutants, Chemical
/
Bentonite
/
Nanostructures
Language:
En
Journal:
Chemosphere
Year:
2008
Document type:
Article
Affiliation country:
Hungary