中文摘要：

以染料黄叱精（Chrysoidine G）和TiO2（Degussa P25）为原料,利用甲苯二异氰酸酯为桥连体,成功合成了一种有机改性的TiO2光催化剂.采用XRD,TEM,FT-IR,UV-Vis对所得催化剂进行了表征,以亚甲基蓝降解为探针反应,考察其可见光催化性能.结果表明：甲苯二异氰酸酯在黄叱精和TiO2之间形成了稳定的化学键,从而实现了对TiO2的表面有机改性;改性后的TiO2在可见光区（400～550nm）有明显的吸收;与未改性TiO2相比,有机改性的TiO2催化剂在可见光照射下表现出了很好的光催化性能.

英文摘要：

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.