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Application of TiO2/ZnAl-Layered Double Hydroxide Photocatalysts for the Solar Photocatalytic Degradation of Food Dye

  • PHOTOCHEMISTRY, MAGNETOCHEMISTRY, MECHANOCHEMISTRY
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Abstract

Photocatalysis of food dye (tartrazine) was studied using TiO2/ZnAl-LDH material derived from layered-double hydroxide structure, which were synthesized by co-precipitation method. The catalyst was characterized using Fourier-transform infra-red (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, Brunauer–Emmett–Teller (BET) analysis, and scanning electron microscope (SEM), combined with energy dispersive X-ray spectroscopy. The photodegradation experiments were carried out by varying different parameters such as initial dye concentration, pH, irradiation time, and dose photocatalyst. Tartrazine mineralization was also studied by calculating the degradation of chemical oxygen demand. The reusability of TiO2/ZnAl-LDH catalysts was studied and its photocatalytic efficiency was found to be unchanged, even after six cycles of use. The degradation of food dye is achieved at a natural pH 6 and catalyst content of 1 g/L after 120 min under sun with a maximum percentage of degradation 82%. The results of kinetic studies correspond to the Langmuir–Hinshelwood model.

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ACKNOWLEDGMENTS

This work was supported by the Solar Equipment Development Unit (UDES) Algeria.

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Authors and Affiliations

  1. Unité de Développement des Équipements Solaires, UDES/Centre de Développement des Energies Renouvelables, CDER, 42415, Bou Ismail, W. Tipaza, Algeria

    L. Aoudjit & D. Zioui

  2. Laboratoire Matériaux et Développement Durable, Faculté des Sciences et Sciences Appliqués, Université de Bouira, 10000, Bouira, Algeria

    F. Aoudjit

  3. Centre de Recherche Scientifique et Technique en Analyses Physico-chimiques (CRAPC), BP 384, RP42004, Bou-Ismail, Tipaza, Algeria

    F. Touahra & K. Bachari

  4. Laboratoire de Chimie du Gaz Naturel, Faculté de Chimie, U.S.T.H.B., El Alia, BP 32, 16111, Bab Ezzouar, Algeria

    D. Halliche

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  1. L. Aoudjit
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  2. F. Aoudjit
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  3. D. Zioui
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  4. F. Touahra
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  5. D. Halliche
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  6. K. Bachari
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Correspondence to L. Aoudjit.

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Aoudjit, L., Aoudjit, F., Zioui, D. et al. Application of TiO2/ZnAl-Layered Double Hydroxide Photocatalysts for the Solar Photocatalytic Degradation of Food Dye. Russ. J. Phys. Chem. 97, 773–780 (2023). https://doi.org/10.1134/S0036024423040040

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  • DOI: https://doi.org/10.1134/S0036024423040040

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