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Erschienen in:
01.08.2012
Wettability and photodegradation activity of sol–gel dip-coated zinc oxide films
Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 2/2012
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Abstract
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 10°) 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 ± 0.05 to 0.5 ± 0.05 the photocatalytic reaction rate constant increases from 0.9 × 10−3 to 5.5 × 10−3 min−1.