Two kind of the feedstock materials were used to produce the atmospheric plasma sprayed coatings. One is the spraying dried powder and the other is the nano-particle dispersed sol precursor. Coating properties were evaluated by the XRD, Raman spectroscopy, SEM and TEM. Also, the photodecomposition efficiency was examined by measuring the decomposition rate of the MB(methylene blue) in a water-cooled solution during the UV radiation and compared to the decomposition efficiency of the optimum coating produced using spraying dried particle. Both the anatase phase fraction and the photodecomposition rate of the coating using the sol precursor were higher than that of the optimum coating using the spraying dried powder.

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