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Photocatalytic Properties of TiO₂ Coatings Prepared by Cold Spray Process
Jonghyuck Han(한종혁),Soo Wohn Lee(이수완) 한국표면공학회 2005 한국표면공학회 학술발표회 초록집 Vol.2005 No.-
Four different coatings deposited using cold spray process were studied with two different powder agglomerating techniques (spray dry and evaporated powder) and using TiO₂ nano-sized powders with and without a l0wt% addition of ZnO. Characterization was performed by SEM, XRD and roughness test. Also the photocatalytic effect of the coatings was evaluated. Although the change of powder preparation techniques and the addition of ZnO into TiO₂ did not show appreciable variations in the surface morphology and Anatase phase transformation, it did show influence on the surface roughness of the coatings, the highest roughness being found in the coatings made by spray powder prepared method. Regarding the photocatalytic effect it was observed that the using of spray dry coating and the addition of ZnO are promoters of purification at higher rates.