Synthesis of benzaldehyde from toluene by a photocatalytic oxidation using TiO2-pillared clays

Ouidri, Siham; Khalaf, Hussein

doi:10.1016/j.jphotochem.2009.07.019

Cited by 44 publications

(33 citation statements)

References 55 publications

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“…Paints containing nanosized photocatalysts, as well as the polymer/TiO 2 nanocomposites, represent possible danger by the means of releasing of nanosized particles due to the deterioration of material cohesion [17,18]. Growing and anchoring of the nanosized TiO 2 particles on the surface of a suitable substrate prevents the release of nanoparticles to the environment, whereas the substrates can represent an inert part [19], or can bring additional functions at final composite [20,21]. A number of substrates has already been studied for anchoring of the TiO 2 on their surface.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of photoactive composite kaolinite/TiO2

Kutláková¹,

Tokarský²,

Kovář³

et al. 2011

Journal of Hazardous Materials

121

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of photoactive composite kaolinite/TiO2

Kutláková¹,

Tokarský²,

Kovář³

et al. 2011

Journal of Hazardous Materials

121

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“…It belongs to a variety of montmorillonite called gray. [19].The titanium (IV) tetraisopropoxide was provided by Aldrich Chemical Company, Inc. The nitric acid and the acetic acid were from Cicarelli.…”

Section: Methodsmentioning

confidence: 99%

Surface and textural characterization of TiO2 pillared organoclays

Vercelone¹,

Sham²,

Torres³

2015

Matéria (Rio J.)

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TiO 2 organoclays are potential adsorbents for aqueous pollutants and subsequently they could favour the photocatalysis of them. For this reason, the study of their surface and textural characteristics is important for the improvement of those processes. In this work TiO 2 pillared organoclays were studied. The surfactant (hexadecyltrimethilammonium bromide) was introduced post-pillaring or during the pillaring process. The effect of the use of different acids of hydrolysis and different surfactants ratios was investigated. The clays were characterized by thermogravimetric analysis, infrared spectroscopy and nitrogen sorptometry. It was found that the highest adsorption capacity post-pillaring of the surfactant is near to 0.5 times the CEC of the original pillared clay, independently of the amount of surfactant offered. An increment in the amount of the surfactant introduced only increased the ratio adsorbed as ionic pair. In these samples the CEC measured after the adsorption was between 0.26 and 0.47 times the original CEC. It was observed a decrease in the total pore volume and the BET surface for every sample. The surface hydrophobicity of the samples with post-pillaring adsorption was higher than in those with co-adsorption. In conclusion, it was demonstrated that the incorporation of surfactant modifies the surface and textural properties of the material in different extent in accordance with the incorporation stage and the amount of surfactant used.

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“…Pillaring process replace large amount of interlayer cations that generally exists as hydrated. In addition pillared clay has low amount of adsorbed/ coordinated water due to the non-swellable nature (Ouidri and Kha, 2009). In addition the broad band at 600-900 cm -1 can be assigned to the characteristic IR absorption band of crystalline TiO 2 and montmorillonite itself (Liu et al, 2007).…”

Section: Characterizationmentioning

confidence: 99%