hrvatski

Cinkom dopirani cerijev(IV) oksid kao UV filter u kremama za sunčanje

Cerium(IV) oxide (CeO2) possesses significant potential as a sunscreen ingredient because it absorbs UV radiation while being relatively transparent to visible light. Furthermore, its photocatalytic activity is lower in comparison to titania and zinc oxide which are the main inorganic UV-blocking filters used in cosmetic industry at the moment. The aim of this work was to incorporate zinc into the ceria crystal lattice in order to obtain the advantages of both compounds in one material and to compare them to commercially available TiO2. Therefore, pure and zinc doped ceria samples were prepared by hydrothermal synthesis and characterized using various characterization techniques: X-ray diffraction, transmission electron microscopy, electron energy loss spectroscopy, and UV-Vis diffuse reflectance spectroscopy. Their catalytic activity was evaluated using the Rancimat test, while cell toxicity was investigated on HaCaT cell line. Fine ceria and doped ceria nanoparticles with particle sizes around 6 nm and band gap values of 3.23 to 3.14 eV were prepared. Both the doped and pure ceria nanoparticles show no difference in cell viability and are biocompatible with human skin, while being catalytically inactive in the fenol oxidation process.

cerijev(IV) oksid ; UV filter ; dopiranje

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