TiO2 Immobilized on Fibrous Clay as Strategies to Photocatalytic Activity

• Autor(a) principal: Oliveira,Wemerson Vieira de
• Data de Publicação: 2020
• Outros Autores: Morais,Alan Ícaro Sousa, Honorio,Luzia Maria Castro, Trigueiro,Pollyana Aragão, Almeida,Luciano Costa, Garcia,Ramón Raudel Peña, Viana,Bartolomeu Cruz, Furtini,Marcelo B., Silva-Filho,Edson Cavalcanti, Osajima,Josy Anteveli
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000100202
• topic: Sepiolite; dye; environmental remediation; discoloration

Abstract TiO2 immobilized in Sepiolite (TiO2/Sep) was successfully prepared by the sol-gel technique, with titanium isopropoxide as the precursor for the formation of TiO2 in the anatase phase calcined at 400 °C. The prepared samples were characterized by X-ray diffraction, Fourier Transform Infrared spectroscopy, Scanning Electron Microscopy coupled to energy dispersive spectroscopy, and thermogravimetric analysis. The results showed that TiO2/Sep structure was identified in all characterizations, showing the specific peaks, bands, mass loss, and morphology after the impregnation process. Photocatalytic experiments were performed under UV irradiation with various photocatalyst concentrations and pH effects in the reaction. The prepared samples presented 72% photocatalytic efficiency for eosin (EA) dye discoloration after 150 min under UV light. This efficiency was attributed to the radicals generated from the TiO2 and the high specific surface area, showing that TiO2/Sep is promising candidate in the degradation of organic pollutants.