عنوان مقاله [English]
In this research, a preliminarily stable sol of titanium dioxide was synthesized by the addition of acetic acid as a promoter in order to increase the yield of TiO2 synthesis. The formation of active anatase phase was confirmed by X-ray powder diffraction analysis and the crystal size of 10–22 nm was obtained. The specific surface area found to be 93.65 m2/g for the synthesized samples. Hereafter, the synthesized TiO2 sols were coated, as a thin layer of nanostructured TiO2, on the surface of ceramic via the cold spray method. The contact angle measurement of the coated surfaces exhibited that the use of these coatings has led to the formation of super-hydrophilic surfaces. Eventually, the photocatalytic activity of the coated samples was examined by the degradation of formic acid under the visible light. It was shown that the calcination of coated surfaces can improve the photocatalytic activity of the coated samples. Consequently, the use of acid acetic as a promoter in the synthesis of TiO2 nanoparticles can significantly improve the photocatalytic properties.