AlCl_3修饰对虎红-TiO_2光催化剂可见光制氢活性的影响  

The influence of modification of AlCl_3 on activity of photocatalytic catalyst rose bengal-TiO_2 generating hydrogen under visible light

作　　者：彭绍琴[1] 张伟[1] 李越湘[1] 吕功煊[2] 李树本[2] 

机构地区：[1]南昌大学化学系,江西南昌330047 [2]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000

出　　处：《功能材料》2007年第3期362-365,共4页Journal of Functional Materials

基　　金：国家重点基础研究计划(973计划)资助项目(2003CB214503);江西省教育厅基金资助项目([2006]24)

摘　　要：用浸渍法制备了Rose bengal-Pt-TiO2和Rose bengal-AlCl3-Pt-TiO2光催化剂,通过可见光下光解水制氢考察了催化剂的催化活性。染料Rosebengal的敏化使TiO2在可见光照射下有较强的吸收和活性。催化剂Rose bengal-AlCl3-Pt-TiO2光催化活性高于Rose bengal-Pt-TiO2。其原因是经过AlCl3修饰的TiO2可以提高对染料Rose bengal的吸附量和吸附强度,从而提高了TiO2的可见光催化活性。The photocatalytic catalysts of Rose bengal-AlCl3-Pt-TiO2 and Rose bengal-Pt-TiO2 were preparea by impregnation method. The photocatalytic activities of the catalysts were investigated by the photocatalytic hydrogen generation from water under visible light. The result indicates that TiO2 sensitized by dye Rose bengal shows stronger absorption and higher photocatalytic activity under visible light irradiation. The catalyst of Rose bengal-AlCl3-Pt-TiO2 has higher photocatalytic activity than Rose bengal-Pt-TiO2. The reason is that TiO2 modified by AlCl3 can enhance the adsorption amount and intensity of dye Rose bengal, so the photocatalytic activity of TiO2 is improved.

关 键 词：染料敏化 二氧化钛 ALCL3 制氢 

分 类 号：O643[理学—物理化学]