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Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Abstract : Superacid sulfated TiO2 was prepared by the sol-gel method and tested as a titania precursor to obtaining a kaolinite/TiO2 nano-hybrid composite. Raman, FTIR, Zeta Potential, and XRD analyses allowed the identification of kaolinite and titania as well as the interactions between them to form the nanohybrid composite. SEM-FEG/TEM analyses clearly showed titanium nanocrystals adhered to the surface of kaolinite microparticles. Thermogravimetric analysis of the powders showed that the composite obtained has a tenuous thermal reinforcement due to the presence of TiO2. Furthermore, the composite has excellent photocatalytic activity, reaching up to about 97% of methylene blue degradation under UV-C radiation in 3 h. Therefore, this study proposes a simple, safe, and effective method for the use of sulfated TiO2 as a precursor in the synthesis of composite nanomaterials based on titania.
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https://hal.mines-ales.fr/hal-03109809
Contributor : Administrateur Imt - Mines Alès <>
Submitted on : Thursday, January 14, 2021 - 8:32:27 AM
Last modification on : Monday, March 15, 2021 - 8:12:25 AM

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Carlos Rafael Silva de Oliveira, Marcos Antonio Batistella, Antônio Augusto Ulson de Souza, Selene Maria de Arruda Guelli Ulson de Souza. Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite. Powder Technology, Elsevier, 2021, 381, pp.366-380. ⟨10.1016/j.powtec.2020.11.063⟩. ⟨hal-03109809⟩

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