Materiais SiO2-TiO2 para a degradação fotocatalítica de diuron

Química Nova

Arthur Alaím Bernardes²  Maria Carolina S. Bulhosa²  Fábio Ferreira Gonçalves²  Marcelo G. Montes D'oca²  Silvana I. Wolke²  João Henrique Z. Dos Santos¹ 

[1] ,Universidade Federal do Rio Grande Escola de Química e Alimentos Rio Grande RS ,Brasil

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

DOI  :  10.1590/S0100-40422011000800009

来源: SciELO

【 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】

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