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Photocatalytic activity of TiO2/stevensite nanocomposites for the removal of Orange G from aqueous solutions

Bouna, Lahcen and Rhouta, Benaïssa and Maury, Francis and Jada, Amane and Senocq, François and Lafont, Marie-Christine Photocatalytic activity of TiO2/stevensite nanocomposites for the removal of Orange G from aqueous solutions. (2014) Clay Minerals, 49 (3). 417-428. ISSN 0009-8558

(Document in English)

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Official URL: http://dx.doi.org/10.1180/claymin.2014.049.3.05


TiO2/stevensite nanocomposite photocatalysts were synthesized by a solvothermal method using TiCl3/HCl as reactants and the stevensite clay mineral extract as support. The prepared photocatalyst samples were then characterized using various techniques such as X-ray diffraction (XRD), Infrared spectroscopy (IR) and Transmission Electron Microscopy (TEM). The Points of Zero Charge (PZC) of the various samples were evaluated by titration of the non-modified and the Ti-modified clay aqueous dispersions, with cationic surfactant solutions. The photocatalytic activity of the resulting nanocomposites samples were evaluated for the removal of Orange G (OG) from aqueous solution as a model dye pollutant. The data indicate that the formation of Na+-stevensite by the TiO2 particles leads to TiO2/stevensite nanocomposites having higher specific surface areas and mesopore volumes, and lower PZC values. Further, the photocatalytic activity was found to be greater for the TiO2/stevensite nanocomposites having the greatest Ti amount, as compared to a pure TiO2 sample, and increased with the increase of the TiO2 amount in the TiO2/stevensite nanocomposites.

Item Type:Article
Additional Information:Thanks to Mineralogical Society editor. The definitive version is available at http://www.ingentaconnect.com The original PDF of the article can be found at Ingentaconnect website : http://www.ingentaconnect.com/content/minsoc/cm/2014/00000049/00000003/art00005?token=004612f01141333c4a2f7a6c6a532c4046213e783c704f6d62222c227e372530332976
HAL Id:hal-01172422
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Cadi Ayyad - UCAM (MOROCCO)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Laboratory name:
Convention de coopération CNRST-Maroc/CNRS-France - Programme d’Action Intégrée Volubilis
Deposited On:07 Jul 2015 11:58

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