Photodegradative properties of TiO2 films prepared by MOCVD

TiO2 is a well-known photocatalist for the air-oxydation of organic compounds. This paper deals with the preparation of TiO2 layers by MOCVD. The photodegradation rate has been studied in the presence of aqueous suspensions (methylene blue) as a function of the film thickness, roughness and crystallite preferred orientation. These results are compared with aqueous suspensions of Degussa P-25 powders. Deposits obtained on fused quartz showed a higher photodegradation rate than those prepared on glass, while Degussa powders exhibited an intermediate value