SiO2-TiO2 materials for diuron photocatalytic degradation

Química Nova

Santos, João Henrique Z. dos¹  Universidade Federal do Rio Grande, Rio Grande, Brasil¹  Bernardes, Arthur Alaím¹  Gonçalves, Fábio Ferreira¹  Bulhosa, Maria Carolina S.¹  Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil¹  Wolke, Silvana I.¹  D'Oca, Marcelo G. Montes¹ 

关键词: photocatalysis;    sol-gel method;    diuron.;   

DOI  :  10.1590/S0100-40422011000800009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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 adsorption-desorption 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.

【 授权许可】

Unknown