Nanoparticles in sunscreen: exploration of the effect and harm of titanium oxide and zinc oxide

Abstract

In recent years, cosmetics have shown a positive development due to its own various properties, functionalities and applications. But as we know, microorganisms can cause the decomposition, deterioration and corruption of cosmetics, bringing economic losses. Therefore, commodities with bactericidal and antibacterial effects are attracting more and more people's attention. People found nanoparticles can be used in the cosmetics like sunscreen to have UV protectection and prevent bacteria simultaneously. In this review, it firstly discuss the nanotechnology and different mechanisms of process of sun protection. In main body, it focused on the nano size of titanium dioxide and zinc oxide particles in sunscreen. Then taking a deeply research on their preparation, effectiveness and toxicity, respectively. In nano titanium dioxide part, because of specific functions, the antibacterial property of it is also been shown. Finally, having a summary and expectation of the nano particles in sunscreen.