Abstract
Sun protection is simply guarding a body from the adverse effects of sunlight. Aside from the hazards of heat, the sun poses the danger of sunburn, which can permanently damage the skin, precancerous changes in the skin, as well as premature wrinkling and signs of aging. UVB (Ultraviolet-B) rays are short wavelengths responsible for sun burns. UVB protection is indicated by SPF (sun protection factor) levels. UVA (Ultraviolet-A) rays penetrate deep into the skin, which can cause premature signs of aging, including sunspots, wrinkles and uneven skin tone. The PA rating system is used to indicate the level of UVA protection. In this report, the mechanism of UV protection by using titanium dioxide and zinc oxide particles are explained. Zinc oxide fine particles have excellent shielding property. We demonstrated the property using zinc oxide particles prepared by a homogeneous precipitation method from aqueous solution of zinc salts. The morphology of the zinc oxide precipitates was significantly changed depending on the precursor composition, the concentration of precipitant, and the reaction temperature. Different UV-vis absorption/reflection characteristics were observed for the particles with different morphologies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
