Photocatalytic degradation of azo dye Metanil Yellow: Optimization and kinetic modeling using a chemometric approach

Sleiman, Mohamad; Vildozo, Daniel; Ferronato, Corinne; Chovelon, Jean‐Marc

doi:10.1016/j.apcatb.2007.06.015

Cited by 253 publications

(119 citation statements)

References 40 publications

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“…Some applications include: white pigment, gas sensor, corrosion inhibitor and optical coating (Sankapal et al, 2005), solar cells (Regan and Grätzel, 1991), high constant dielectrics and high resistivity dielectrics (Sankapal et al, 2005). TiO 2 has also been used to decompose carbon dioxide and generate hydrogen gas (Fox and Dulay, 1993), decompose pollutants (Hidalgo et al, 2007), and as a photocatalyst (Bouzaida et al, 2004;Guettai and Amar, 2005;Ho and Yu, 2006;Sahel et al, 2007;Sleiman et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Jahn

Carreño

Foletto

2011

Braz. J. Chem. Eng.

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-An investigation was carried out on the synthesis of titanium dioxide nanopowders via the hydrothermal method, examining the influence of temperature (150ºC and 200ºC) and reaction time (6 to 36 h). The resulting powders were characterized by X-ray diffraction, infrared absorption spectrophotometry, transmission electron micrographs and surface area. The X-ray diffraction revealed that there was formation of a pure crystalline phase, consisting only of anatase for all conditions of synthesis. Both temperature and reaction time proved to have a slight influence on the crystallite size (from 9 to 17 nm) and a significant influence on the surface area (from 86 to 168 m 2 .g -1 ).

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Section: Introductionmentioning

confidence: 99%

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Jahn

Carreño

Foletto

2011

Braz. J. Chem. Eng.

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“…In studying the effects of Ph on the photo-catalytic degradation of dyes, two things must be borne in mind; one, industrial effluents may not be neutral, and two; pH of the reaction mixture influences the surface-charge -properties of the photo-catalysts [13] .Sleiman et al [11] reported that influence of pH on the photo-catalytic degradation of Metanil Yellow, an anionic dye with a sulphonate group, over TiO 2 photo-catalyst under UV illumination. The result shows that the process efficiency is not over a wide range of pH (4)(5)(6)(7)(8). The author resulted that, the nature of the substance to be degraded affects the operating pH of the system.…”

Section: Effect Of Ph On Photocatalytic Degradation Of Dyementioning

confidence: 85%

Review: Photocatalytic Degradation of Textile Azo Dyes

2017

IJAERD

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“…En effet, du fait de la nature du catalyseur utilisé, toute variation du pH affecte le point isoélectrique ou la charge de surface de ce catalyseur. Des études ont utilisé le point de charge nulle (pH ZC ) du TiO 2 pour étudier l'impact du pH sur la performance de l'oxydation photocatalytique (Toor et al, 2006;Ochuma et al, 2007 ;Sleiman et al, 2007). Le pHzc du dioxyde de titane est compris entre 6,25-6,9 (Kosmulski, 2006 Dionysiou et al (2000).…”

Section: Influence Du Phunclassified

Dégradation photocatalytique du 5-fluorouracile par un système UV-A/TiO2 : effet de la concentration du catalyseur et du polluant, du pH et des matrices de dilution

N’guettia¹,

Bertrand²,

Soro³

et al. 2017

Int. J. Bio. Chem. Sci

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; Tél : +225 48 53 40 09 REMERCIEMENTS Nous remercions les acteurs du projet AMURGE (Appui à la modernisation et à la réforme des universités et grandes écoles de Côte d'Ivoire) pour leur contribution financière à la réalisation de ces travaux. RÉSUMÉLes résidus de médicaments anticancéreux font partie des micropolluants émergents souvent détectés dans les écosystèmes aquatiques. L'objectif de cette étude était de préciser l'influence de la concentration en catalyseur (TiO 2 ) -de l'eau du robinet est vraisemblablement responsable de la diminution de la vitesse constatée, les ions hydrogénocarbonate agissant comme des pièges à radicaux. La variation du pH de 3 à 10 a montré une vitesse optimale pour un pH = 5,8. Egalement, dans l'eau usée, les résultats se sont montrés similaires à ceux obtenus dans l'eau de robinet. © 2017 International Formulae Group. All rights reserved.Mots clés : 5-fluorouracile, UV-A/TiO 2 , eau ultra pure, eau bicarbonatée, eau usée.Photocatalytic degradation of 5-fluorouracil by a UV-A / TiO 2 system: effect of catalyst concentration and pollutant, pH and dilution matrices ABSTRACT Residues of anticancer drugs are among the emerging micropollutants often identified in aquatic ecosystems. The aim of this study was to explain the influence of the concentration of the catalyst (TiO 2 ) and of water matrix composition on the photocatalytic degradation of 5-flurouracil (20 mg.L -1 ). For this purpose, GUETTIA et al. / Int. J. Biol. Chem. Sci. 11(3): 1373-1385, 2017 1374 photocatalytic tests were carried out with suspensions of titanium dioxide at concentrations between 0.1 to 1.0 g.L -1 in ultrapure water and tap water (water with high calcium hardness: with a hydrotimetric parameters > 35° F). The results showed that more than 80% after 120 min of irradiation (UV-A) in ultra-pure at concentrations of 0.1 g L -1 to 1 g L -1 of TiO 2 . However, this rate is 33% and 75% for these same concentrations in tap water matrices. The high concentration of bicarbonate ions in tap water (HCO 3 -) is probably responsible for the decrease in the observed velocity, as the bicarbonate ions act as radical traps. The results in the wastewater matrice are same with those obtained in the tap water. The pH variation from 3 to 10 showed the optimum rate at pH 5.8.

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Photocatalytic degradation of azo dye Metanil Yellow: Optimization and kinetic modeling using a chemometric approach

Cited by 253 publications

References 40 publications

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Review: Photocatalytic Degradation of Textile Azo Dyes

Dégradation photocatalytique du 5-fluorouracile par un système UV-A/TiO2 : effet de la concentration du catalyseur et du polluant, du pH et des matrices de dilution

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