The compositions and photocatalytic activity of plasma sprayed TiO2, TiO2-30%FeTiO3, TiO2-50%FeTiO3 and FeTiO3 coatings were investigated. The influence of FeTiO3 compound on the photocatalytic activity of TiO2 coating was clarified. The TiO2-30%FeTiO3 coating sprayed under the arc current of 400 A had good photocatalytic activity because the coating did not contain the unfavorable Fe2TiO5 phase. The relative deposition speed of TiO2-30%FeTiO3 powder under the arc current of 400 A was approximate to 4 µm/pass. Although pure FeTiO3 compound nearly did not show photocatalytic performance, the existence of FeTiO3 could improve the photocatalytic activity of anatase TiO2 if FeTiO3 contacts coherently with it, which was explained using two-steps electron transfer model.

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