Synthesis and Characterization of TiO2/SiO2 Monoliths as Photocatalysts on Methanol Oxidation
Por:
Regalado-Raya, Rigoberto, Romero-Romero, Rubi, Aviles-Garcia, Osmin, Espino-Valencia, Jaime
Publicada:
1 ene 2018
Resumen:
Photocatalytic materials based on silica-titania (SiO2-TiO2) were
synthesized by sol-gel and dip-coating method. TEOS and titanium
butoxide were used as precursors of the silica-titania, respectively. A
thin film with anatase phase was obtained on the surface of the support.
The effect of variables as dispersion mechanism, immersion time, and
number of treatment cycles were studied. The materials were
characterized using X-ray diffraction, scanning electron microscopy,
energy dispersion scanning, and N 2 adsorption-desorption. The highest
crystallinity of TiO2 on silica, high specific surface area in TiO2-SiO2
materials, and thin film formation were obtained by using a stirring
plate and minimum immersion time. The so synthesized catalyst allowed
the production of formaldehyde from the photocatalyzed methanol
oxidation in a packed-bed reactor.
Filiaciones:
Regalado-Raya, Rigoberto:
Univ Michoacana, Fac Ingn Quim, Edif 6,Ciudad Univ, Morelia 58060, Michoacan, Mexico
Romero-Romero, Rubi:
UNAM, Ctr Conjunto Invest Quim Sustentable UAEMex, Km 14-5 Carretera Toluca Atlacomulco, Toluca, Estado De Mexic, Mexico
Aviles-Garcia, Osmin:
Univ Michoacana, Fac Ingn Quim, Edif 6,Ciudad Univ, Morelia 58060, Michoacan, Mexico
Espino-Valencia, Jaime:
Univ Michoacana, Fac Ingn Quim, Edif 6,Ciudad Univ, Morelia 58060, Michoacan, Mexico
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