Influência do tipo de ácido e tempo de envelhecimento na atividade fotocatalítica de filmes finos de TiO2

Química Nova

Liana Key Okada Nakamura¹  Jorge Moreira Vaz¹ 

[1] ,Instituto de Pesquisas Energéticas e Nucleares Centro de Química e Meio Ambiente São Paulo SP ,Brasil

关键词: titanium dioxide;    sol-gel;    photocatalysis;   

DOI  :  10.1590/S0100-40422011000700013

来源: SciELO

【 摘 要 】

TiO2 thin films were prepared by the sol-gel method using different acids (HCl and HAc), with a parallel evaluation of the gel ageing effects on the film properties. After the thermal treatments, the resulting materials were characterized through gravimetric analysis, UV-VIS spectrophotometry (from which optical parameters such as band gap was derived), XRD, morphological surface analysis (AFM) and photocatalytic activity. The majority of the obtained thin films parameters were similar independent of the acid type and the ageing time of the gel. Nevertheless, a visible effect of the surface morphology properties on the films and their photocatalytic activity was observed.

【 授权许可】

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