An organically hybridized TiO₂ photocatalyst was successfully synthesized using a dye chrysoidine G, tolylene-2,4-diisocyanate and Degussa P25 as starting materials. Tolylene-2,4-diisocyanate was used as a connecter, and one —NCO reacted with Ti—OH and the other with the dye. The as-prepared catalyst was characterized by XRD, TEM, IR and UV-visible and its photocatalytic activity was evaluated by the degradation of methylene blue under visible light. The results showed that stable chemical bonds were formed through the above-mentioned reaction and an organically hybridized photocatalyst was prepared. The obtained catalyst showed an obvious absorption in visible region (400～550 nm). Compared with unmodified TiO₂, the organically hydridized TiO₂ exhibited largely enhanced activity for photocatalytic degradation of methylene blue under visible light irradiation.

Key words: TiO₂, organically hybridized, visible photocatalysis, preparation