White nanoparticles of calcia-doped ceria were prepared from the precipitate by reacting CeCl3-CaCl2 mixed solution with NaOH solution at pH 12 and the oxidation with hydrogen peroxide solution at 40°C, followed by the calcination at 700°C for 1 h. Ceria particles generated far less singlet oxygen and caused far less damage to the DNA plasmids upon UV illumination than either the titania or the zinc oxide reference pigments.
- Calcia-doped ceria
- DNA damage
- Inorganic UV-shielding material
- Photocatalytic activity
- Singlet oxygen