SiO2-TiO2 materials for diuron photocatalytic degradation

Quimica nova

Santos, João Henrique Z. dos¹  Bernardes, Arthur Alaím²  Gonçalves, Fábio Ferreira²  Bulhosa, Maria Carolina S.²  Wolke, Silvana I.²  D'Oca, Marcelo G. Montes² 

[1] Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil;Universidade Federal do Rio Grande, Rio Grande, Brasil

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-TiO2materials prepared by sol-gel method were evaluated in the photocatalytic degradationof diuron. The materials were prepared with and without surfactant cetyltrimethylammoniumchloride at different temperatures (25, 50 and 100 ºC). The samples were characterizedby N2 adsorption-desorption measurements, scanning electron microscopy,X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy andinfrared diffuse reflectance spectroscopy. The results showed that the materialssynthesized with the surfactant had higher surface areas and band-gap valuessimilar to anatase. All materials were more active than the commercial catalystP-25 and better performance was achieved using the surfactant in the materialsynthesis.

【 授权许可】

CC BY