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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (14): 1289-1293. 上一篇    下一篇

研究通讯

有机改性TiO2光催化剂的制备及可见光催化性能

姜东1,2, 徐耀*,3, 侯博3, 吴东1, 孙予罕*,1   

  1. (1中国科学院山西煤炭化学研究所煤转化国家重点实验室 太原 030001)
    (2中国科学院研究生院 北京 100049)
    (3中国科学院山西煤炭化学研究所炭材料重点实验室 太原 030001)
  • 投稿日期:2006-12-15 修回日期:2007-04-10 发布日期:2007-07-28
  • 通讯作者: 徐耀

Synthesis of Organically Hybridized TiO2 Photocatalyst and Its Photocatalytic Activity under Visible Light Irradiation

JIANG Dong1,2; XU Yao*,3; HOU Bo3; WU Dong1; SUN Yu-Han*,1   

  1. (1 State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001)
    (2 Graduate School of the Chinese Academy of Sciences, Beijing 100049)
    (3 Key Laboratory of Carbon Material, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001)
  • Received:2006-12-15 Revised:2007-04-10 Published:2007-07-28

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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(400～550 nm)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.

关键词: TiO2, 有机改性, 可见光催化, 制备

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