Synthesis and characterization of mesoporous silica films encapsulating titanium dioxide particles; Photodegradation of 2,4-dichlorophenol.
Degussa P-25 TiO2 encapsulated in a SBA-15 mesoporous thin film silica matrix prepared using a block copolymer templating method. The film structure was characterized using small angle X-ray diffraction (XRD), variable angle spectroscopic ellipsometry (VASE), and polarized light microscopy. The photoactivity of the films was assessed using HPLC and UV-vis spectroscopy to study the photodegradation of 2,4-dichlorophenol, an industrial pollutant, in water under 350 nm irradiation. The unoptimized film was found to be approximately half as photoactive as an equivalent dispersion of TiO2.
Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA.
William A
WA
Adams
Martin G
MG
Bakker
Transito
T
Macias
I Atly
IA
Jefcoat
D002733:Chlorophenols / Q000737:chemistry*; D008859:Microscopy, Polarization / Q000379:methods; D010316:Particle Size; D010782:Photolysis; D012822:Silicon Dioxide / Q000138:chemical synthesis*; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods
D002733:Chlorophenols; C009495:titanium dioxide; D012822:Silicon Dioxide; D014025:Titanium; C004762:2,4-dichlorophenol