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

Published online by Cambridge University Press:  27 February 2018

L. Bouna ,
B. Rhouta ,
F. Maury ,
A. Jada ,
F. Senocq  and
M. -C. Lafont
L. Bouna
Affiliation:
Laboratoire de Matière Condensée et Nanostructures (LMCN), Faculté des Sciences et Techniques Guéliz, BP 549, Marrakech, Morocco
B. Rhouta
Affiliation:
Laboratoire de Matière Condensée et Nanostructures (LMCN), Faculté des Sciences et Techniques Guéliz, BP 549, Marrakech, Morocco
F. Maury
Affiliation:
CIRIMAT, ENSIACET, 4 Allée EmileMonso, BP44362, 31030 ToulouseCedex 4, France
A. Jada*
Affiliation:
IS2M, 15 rue Jean Starcky BP 2488, 68057 Mulhouse Cedex, France
F. Senocq
Affiliation:
CIRIMAT, ENSIACET, 4 Allée EmileMonso, BP44362, 31030 ToulouseCedex 4, France
M. -C. Lafont
Affiliation:
CIRIMAT, ENSIACET, 4 Allée EmileMonso, BP44362, 31030 ToulouseCedex 4, France
*
*E-mail: [email protected]
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Abstract

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 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 content in the TiO2/stevensite nanocomposites.

Keywords

claytitanium dioxidestevensitephotocatalysisstreaming induced potentialnanocomposites
Type
Research Article
Information
Clay Minerals , Volume 49 , Issue 3 , June 2014 , pp. 417 - 428
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

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