Abstract
Titanium oxide that has the photocatalytic activity is used as a white pigment for cosmetics. A certain degree of sebum on the skin is decomposed by the ultraviolet radiation in sunlight. In this work, titanium oxide was shaken with various concentrations of phosphoric acid to synthesize a novel white pigment for cosmetics. Their chemical composition, powder properties, photocatalytic activity, color phase, and smoothness were studied. The obtained materials indicated XRD peaks of titanium oxide; however, these peak intensities became weak by phosphoric acid treatment. The photocatalytic activity of the obtained powders became weak by phosphoric acid treatment to protect the sebum on the skin. The high concentration of phosphoric acid was suitable to obtain a novel white pigment in the phosphoric acid treatment of titanium oxide.
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