HR: 17:35h
AN: B44A-06    [Abstracts]
TI: The Use of Small-Particle Sized TiO2 Supported on Clays as Photocatalytic Materials: A Low- Cost Alternative Technology for the Degradation of Air Pollutants
AU: * Kibanova, D
EM: whisper.lu@gmail.com
AF: Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Exterior,Ciudad Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: * Kibanova, D
EM: whisper.lu@gmail.com
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior,Ciudad Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: Trejo, M
EM: mtrejo@fisica.unam.mx
AF: Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Circuito Exterior,Ciudad Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: Destaillats, H
EM: HDestaillats@lbl.gov
AF: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States
AU: Destaillats, H
EM: HDestaillats@lbl.gov
AF: Arizona State University, Department of Civil and Environmental Engineering, Arizona State University, Department of Civil and Environmental Engineering, Tempe, AZ , United States
AU: Cervini-Silva, J
EM: jcervini@igg.unam.mx
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior,Ciudad Universitaria, Coyoacan, Mexico City, 04510, Mexico
AB: Assisted photocatalysis by TiO2 is an advanced oxidation process that has been employed for air and water remediation. Clays are natural porous materials bearing high surface areas and interlayer spacing that allows entrapment of small-sized particles. Pillared clays exchanged with small-sized TiO2 can constitute materials with interesting photocatalytic properties because high surface area values and large contents of mesospores, which enables analyte trapping. Furthermore, intercalation at the clay interlayer enables TiO2 to become more resistant to aggregation when in solution. Just recently it has been reported that clays can lead to increases in the photocatalytic activity of TiO2 when the mesopores size is adequate to host organic solutes and ensure their effective interaction with the TiO2 particles. In this paper we study the photocatalytic properties of small-sized TiO2 supported on the following clay samples: Montmorillonite [SWy-2, Na0.2Ca0.1Al2Si4O10(OH)2(H2O)10 ] from Crook Country, Wyoming, USA; Hectorite [SHCa-1, Na0.4Mg2.7Li0.3Si4O10(OH)2 ] from San Bernardino. Country, California, USA; Kaolinite [KGa-1b, Al2Si2O5(OH)4 ] from Washington Country, Georgia, USA. Deposition of TiO2 on the clay surface was conducted by using a sol-gel synthetic method. Anatase TiO2 particles transformation at the clay interlayer was achieved by thermic treatment at 180 „aC. Material characterization was conducted using FTIR microspectroscopy, Scanning Electron Microscopy (SEM), and XRD analysis. The organic compound used as probe was ethanol
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0394 Instruments and techniques
DE: 0432 Contaminant and organic biogeochemistry (0792)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
DE: 1094 Instruments and techniques
SC: Biogeosciences [B]
MN: 2007 Joint Assembly