Etude de performance photocatalytique de composites à base de TiO2/Kaolinite

fendi, karim

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Élément Dublin Core	Valeur	Langue
dc.contributor.author	fendi, karim	-
dc.date.accessioned	2026-05-07T14:23:49Z	-
dc.date.available	2026-05-07T14:23:49Z	-
dc.date.issued	2026-04-28	-
dc.identifier.citation	As part of this thesis, two types of TiO₂-based nanocomposites were developed and evaluated for their photocatalytic efficiency in degrading organic pollutants, particularly industrial dyes. The first approach focused on studying the influence of different treatments of halloysite-type kaolinite used as a support for TiO₂, with the aim of enhancing the photodegradation of methylene blue. Analyses by X-ray diffraction (XRD), ATR spectroscopy, BET surface area measurements, and scanning electron microscopy (SEM) showed that the crystalline structure and porosity of the support significantly influence the photocatalytic properties. The addition of kaolinite resulted in an increase in the band gap and a marked improvement in dye degradation rates. In a second part, TiO₂-MgO/halloysite nanocomposites were synthesized with varying MgO contents. The incorporation of MgO improved charge separation by reducing electron-hole recombination, while halloysite contributed to an increased surface area and better catalyst dispersion. The TiO₂-MgO/halloysite composite demonstrated the best performance, achieving up to 99.8% removal of crystal violet dye, thus outperforming commercial P25 TiO₂. Kinetic studies revealed a chemisorption mechanism consistent with the pseudo-second-order model, while adsorption isotherm analysis followed the Langmuir model, indicating monolayer adsorption.	en_US
dc.identifier.uri	http://dspace.univ-bouira.dz:8080/jspui/handle/123456789/19745	-
dc.language.iso	en	en_US
dc.publisher	Université de BOUIRA جامعة البويرة	en_US
dc.subject	Kaolinite; TiO2; Adsorption; Photodegradation; Methylene blue; Nanocomposites	en_US
dc.title	Etude de performance photocatalytique de composites à base de TiO2/Kaolinite	en_US
dc.type	Thesis	en_US
Collection(s) :	Faculté des Sciences et des Sciences Appliquées

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