Materiais SiO2-TiO2 para a degradação fotocatalítica de diuron

• Autor(a) principal: Bernardes, Arthur Alaím
• Data de Publicação: 2011
• Outros Autores: Bulhosa, Maria Carolina Salum, Gonçalves, Fábio Ferreira, D'Oca, Marcelo Gonçalves Montes, Wolke, Silvana Ines, Santos, Joao Henrique Zimnoch dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/72936
• topic: Fotocatálise; Sol-gel; Pesticidas; Photocatalysis; Sol-gel method; Diuron

SiO2-TiO2 materials prepared by sol-gel method were evaluated in the photocatalytic degradation of diuron. The materials were prepared with and without surfactant cetyltrimethylammonium chloride at different temperatures (25, 50 and 100 oC). The samples were characterized by N2 adsorptiondesorption measurements, scanning electron microscopy, X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy and infrared diffuse reflectance spectroscopy. The results showed that the materials synthesized with the surfactant had higher surface areas and band-gap values similar to anatase. All materials were more active than the commercial catalyst P-25 and better performance was achieved using the surfactant in the material synthesis.