Spherical activated carbon as an enhanced support for TiO2/AC photocatalysts

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/40189
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Title: Spherical activated carbon as an enhanced support for TiO2/AC photocatalysts
Authors: Ouzzine, Mohammed | Romero Anaya, Aroldo José | Lillo-Rodenas, Maria Angeles | Linares-Solano, Angel
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Spherical activated carbon | TiO2/AC | Photocatalysts
Knowledge Area: Química Inorgánica
Issue Date: Feb-2014
Publisher: Elsevier
Citation: Carbon. 2014, 67: 104-118. doi:10.1016/j.carbon.2013.09.069
Abstract: Titanium dioxide nanoparticles prepared in situ by sol–gel method were supported on a spherical activated carbon to prepare TiO2/AC hybrid photocatalysts for the oxidation of gaseous organic compounds. Additionally, a granular activated carbon was studied for comparison purposes. In both types of TiO2/AC composites the effect of different variables (i.e., the thermal treatment conditions used during the preparation of these materials) and the UV-light wavelength used during photocatalytic oxidation were analyzed. The prepared materials were deeply characterized (by gas adsorption, TGA, XRD, SEM and photocatalytic propene oxidation). The obtained results show that the carbon support has an important effect on the properties of the deposited TiO2 and, therefore, on the photocatalytic activity of the resulting TiO2/AC composites. Thus, the hybrid materials prepared over the spherical activated carbon show better results than those prepared over the granular one; a good TiO2 coverage with a high crystallinity of the deposited titanium dioxide, which just needs an air oxidation treatment at low-moderate temperature (350–375 °C) to present high photoactivity, without the need of additional inert atmosphere treatments. Additionally, these materials are more active at 365 nm than at 257.7 nm UV radiation, opening the possibility of using solar light for this application.
Sponsor: M. Ouzzine thanks MAEC–AECID for a predoctoral fellowship. The authors thank Generalitat Valenciana (GVPRE/2008/004, Prometeo/2009/047), FEDER and Office of the Vice President for Research, Development and Innovation of University of Alicante (UAUSTI10-08) for financial support.
URI: http://hdl.handle.net/10045/40189
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2013.09.069
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.carbon.2013.09.069
Appears in Collections:INV - MCMA - Artículos de Revistas

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