Preparation and characterization of TiO{sub}2 and apatite coated photocatalyst

摘要

A novel photocatalyst was fabricated by coating TiO{sub}2 and successively apatite on a fibrous ceramic body through the following procedure. At the first step, TiO{sub}2 from Ti[(CH{sub}3){sub}2CHO]{sub}4 was deposited on the fibrous body by means of the sol-gel method (TiO{sub}2 coated photocatalyst). Then, the resulting TiO{sub}2 coated photocatalyst was soaked for 24h at 37°C in a simulated body fluid with the phosphate ion concentration much higher than that in the human body plasma. By this soaking treatment, apatite crystals were formed on this TiO{sub}2 coated photocatalyst (TiO{sub}2 and apatite coated photocatalyst). It was observed that the composited coating of apatite improved the adsorption ability of TiO{sub}2 coated photocatalyst for colon bacillus, acetaldehyde and methylene blue, and eventually, the TiO{sub}2 and apatite coated photocatalyst could effectively decompose them.