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Study of the Photocatalytic degradation of organic pollutants in the presence of titanium dioxide supported on a microporous silico-aluminophosphate

Abstract : Over the past decade, advanced oxidation technologies have proven effective in destroying pollutants. One of the most widely used techniques, heterogeneous photocatalysis, which allows pollutants to be degraded by irradiating a semiconductor. 1 The most commonly used semiconductor is titanium dioxide. 2 The use of TiO2 in suspension has largely proven its effectiveness. However, in this configuration, it is necessary to introduce a liquid-solid separation step in order to remove titanium dioxide from the solution. To avoid such separation, the Photocatalyst can be immobilized on a solid support. A microporous Silicoaluminophosphates carrier of type SAPO-5 was prepared by hydrothermal method. This solid has been used as a support for titanium oxide which has been impregnated at different rates. The prepared materials were characterized by various physic-chemical analysis techniques, such as X-ray diffraction, scanning electron microscopy, Adsorption-desorption from N2 to 77K, UV-visible diffuse reflection (DRS). The prepared materials were recovered by studying their catalytic properties in the photodegradation of indigo carmine. The reaction is carried out at different titanium oxide levels and different initial dye concentrations and the study showed that the 40% titanium oxide catalyst has the best activity. The kinetics of dye removal was conducted using the Langmuir-Hinshelwood (L-H) model as shown in Figure 2 Figure 1. Chemical structure of indigo carmine. Figure 2. (a) The effect of the impregnation rate in tio2 on the catalyst efficiency. (b) Application of the Langmuir-Hinshelwood kinetic model
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Contributeur : Salima Larbaoui <>
Soumis le : vendredi 15 mai 2020 - 17:16:54
Dernière modification le : vendredi 15 mai 2020 - 17:37:26


  • HAL Id : hal-02593410, version 1



S. Larbaoui, H. Hentit, H. Boukabouse, J-C. Jumas, A. Bentouami. Study of the Photocatalytic degradation of organic pollutants in the presence of titanium dioxide supported on a microporous silico-aluminophosphate. 60th International Scientific Conferencei n Materials Science and Applied Chemistry, MSAC2019, Oct 2019, Riga, Lithuania. 98, pp.247 - 257, 2019. ⟨hal-02593410⟩



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