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.
Adams
William A
WA
Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA.
Bakker
Martin G
MG
Macias
Transito
T
Jefcoat
I Atly
IA
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