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As an inorganic sunscreen material, nano-titanium dioxide (nano-TiO 2 ) owns broad prospects in sunscreen cosmetics for its small size, non-toxicity, strong covering ability, UV absorption and scattering abilities, etc. Nano-TiO 2 has high photocatalytic activity, so it will go through a series of complex chemical reactions under light irradiation and cause damage to its surrounding agents. In addition, it is hard to disperse in various aqueous and non-aqueous mediums due to its high surfacedoi:10.21127/yaoyigc20160007 fatcat:2m64dghndrb4tbkis7pcqpmyzm