催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (10): 1037-1042.

• 研究论文 • 上一篇    下一篇

全固态平面型ITO/Fe3+-TiO2/ITO光电催化器件的制备和催化性能

尚静,薛莲,李佳,赵凤伟   

  1. 北京大学环境科学与工程学院, 北京 100871
  • 收稿日期:2008-10-25 出版日期:2008-10-25 发布日期:2008-10-25

Preparation and Performance of ITO/Fe3+-TiO2/ITO Solid-State Planar Photoelectrocatalytic Devices

SHANG Jing*, XUE Lian, LI Jia, ZHAO Fengwei   

  1. College of Environmental Science and Engineering, Peking University, Beijing 100871, China
  • Received:2008-10-25 Online:2008-10-25 Published:2008-10-25

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摘要： 在具有条形电极的ITO (氧化铟锡)玻璃上负载Fe3+-TiO2薄膜,得到全固态平面型ITO/Fe3+-TiO2/ITO光电催化器件. 利用Keithley 2400数字源电流表对器件施以一定的偏压,以气相甲醛的降解为模型反应,对器件分别进行了空气和氮气条件下的光电催化性能测试. 结果表明,甲醛的存在能够增强体系的光电流,并且在氮气下器件的光电流明显大于在空气下的光电流,说明甲醛参与了电子的迁移过程. ITO/Fe3+-TiO2/ITO器件表现出比ITO/TiO2/ITO器件更高的光催化活性,且前者的光电流值小于后者,说明掺杂Fe3+所引起的电子迁移率的降低远大于所引起的激子分离几率的提高. ITO/Fe3+-TiO2/ITO器件在外加偏压下活性提高,但提高的幅度没有ITO/TiO2/ITO器件明显.

关键词: 二氧化钛薄膜, 三价铁掺杂, 光电催化, 器件, 甲醛降解

Abstract: For both ITO/TiO2/ITO and ITO/Fe3+-TiO2/ITO devices, the photocatalyt ic activity with bias (Xp1) was higher than that without bias (X p2). However, the enhancement of ITO/Fe3+-TiO2/ITO was less obvious than that of ITO/TiO2/ITO because of the confinement increment of exciton sep aration efficiency in the Fe3+-TiO2 film.

Key words: titania film, iron doping, photoelectrocatalysis, device, formaldehyde degradation