Wettability and photodegradation activity of sol-gel dip-coated zinc oxide films
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Data
2012-08-01
Autores
da Silva, Marlon Nunes [UNESP]
Santilli, Celso Valentim [UNESP]
Pulcinelli, Sandra Helena [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Springer
Resumo
The hydrophilic characteristics of zinc oxide combined with the electronic properties of this width band gap semi-conductor were used to produce transparent, anti fog and photocatalytic porous films by using a simple sol-gel dip-coating process. The observed values of contact angles (near to 10A degrees) and calculated spreading coefficients (close to zero) indicate that sol-gel dip-coated ZnO porous films show excellent wettability. The photocatalytic behavior of these films measured from methylene blue degradation is dependent on the film thickness in agreement with wettability results; as the film thickness increases from 0.1 +/- A 0.05 to 0.5 +/- A 0.05 the photocatalytic reaction rate constant increases from 0.9 x 10(-3) to 5.5 x 10(-3) min(-1).
Descrição
Palavras-chave
ZnO films, Photocatalyst, Contact angle, Hydrophilicity
Como citar
Journal of Sol-gel Science and Technology. Dordrecht: Springer, v. 63, n. 2, p. 230-234, 2012.