Photocatalytic reduction of Cr(VI) on nanosized Fe2O3 supported on natural Algerian clay: Characteristics, kinetic and thermodynamic study

Mekatel, H.; Amokrane, Samira; Bellal, B.; Trari, M.; Nibou, Djamel

doi:10.1016/j.cej.2012.06.121

Cited by 90 publications

(30 citation statements)

References 33 publications

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“…This can be rationalized according to the fact that, the photocatalyst could only provide a constant amount of active sites at a fixed dosage. As the initial nitrate concentration increases, more nitrate ions are adsorbed and accumulated on the surface of the catalyst, which thereby decreases the number of photons reaching the active sites of the catalyst and leads to the decrease of photoreduction rate of nitrate [57,58].…”

Section: Effect Of Initial Nitrate Concentrationmentioning

confidence: 99%

Photocatalytic reduction of nitrate in seawater using C/TiO2 nanoparticles

Shaban

Maradny

Farawati

2016

Journal of Photochemistry and Photobiology A: Chemistry

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Section: Effect Of Initial Nitrate Concentrationmentioning

confidence: 99%

Photocatalytic reduction of nitrate in seawater using C/TiO2 nanoparticles

Shaban

Maradny

Farawati

2016

Journal of Photochemistry and Photobiology A: Chemistry

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“…[6][7][8]. Consequently, it is still desirable to develop novel visible light-responsive photocatalysts for the photocatalytic reduction of Cr(VI) in aqueous solution [9,10].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient photocatalytic reduction of Cr(VI) by bismuth hollow nanospheres

Qin

Wang

et al. 2013

Catalysis Communications

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“…It is well established that the photocatalysis is efficient at low concentrations. Therefore, we have selected a concentration of 50 ppm for the further experiments (Mekatel et al 2012). Kinetic analysis…”

Section: Photocatalysismentioning

confidence: 99%

Preparation and characterization of nano structured Ba2SnO4 as a novel photocatalyst material for the chromate reduction

et al. 2013

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The photo-electrochemical properties of the layered perovskite Ba 2 SnO 4 , prepared by nitrate route are reported for the first time. The oxide exhibits a direct optical transition at 2.98 eV, attributed to the charge transfer O 2-: 2p ? Sn 4? : 5s and possesses a chemical stability over the whole pH range. The Mott Schottky plot in acidic medium is characteristic of n type conductivity with a flat band potential E fb of -0.84 V SCE and an electron density N D of 1.14 9 10 17 cm -3 . The electrochemical impedance spectroscopy reveals the bulk and grain boundaries contributions. Ba 2 SnO 4 is of interest for the environmental protection. At pH 2.5, its conduction band (CB, -0.86 V SCE ) is below the HCrO 4 -level, yielding a spontaneous reduction to Cr 3? under UV light. The reduction is optimized with respect to the Cr(VI) concentration. The photo reduction follows a pseudo-first-order kinetic and the data fit well the Langmuir-Hinshelwood (L-H) model with an apparent rate constant of 0.18 h -1 for an initial concentration of 50 ppm. The chromate reduction under solar light is studied under optimized conditions. In presence of oxalic acid, 73 % of initial concentration disappears after *2 h of irradiation.

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Photocatalytic reduction of Cr(VI) on nanosized Fe2O3 supported on natural Algerian clay: Characteristics, kinetic and thermodynamic study

Cited by 90 publications

References 33 publications

Photocatalytic reduction of nitrate in seawater using C/TiO2 nanoparticles

Photocatalytic reduction of nitrate in seawater using C/TiO2 nanoparticles

Highly efficient photocatalytic reduction of Cr(VI) by bismuth hollow nanospheres

Preparation and characterization of nano structured Ba2SnO4 as a novel photocatalyst material for the chromate reduction

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