Abstract: The CeO₂-SiO₂ coated rutile TiO₂ was prepared by sol-gel method.The influences of slurry concentration，dosage of dispersants，and two kinds of coating agent contents on performance of CeO₂-SiO₂ coated rutile TiO₂ were investigated by orthogonal experiment.The zeta potential，surface morphology，and elements were characterized by nano-ZS，scaning electron microscopy（SEM），transmission electron microscopy（TEM），and EDS.Results showed under conditions of the water bath temperature about 80 ℃，the rotation speed of 600 r/min，the mass fraction of dispersant of 0.1%，the CeO₂ mass fraction of 3%，and the SiO₂ mass fraction of 4%，two layers compact and uniform CeO₂ and SiO₂ films on the rutile TiO₂ were confirmed. By the photocatalytic degration of Rhb，the results showed that the films of CeO₂ and SiO₂ enhanced the weather durability of rutile TiO₂.

Key words: CeO₂/SiO₂ dioxide, rutile titanium dioxide, Rhodamine-B, weather durability