磁场辅助对掺杂TiO2薄膜光催化活性的影响
来源期刊：中南大学学报(自然科学版)2008年第6期
论文作者：尹荔松 范海陆 周克省 陈永平 谭敏
文章页码：1175 - 1180
关键词：TiO2；光催化；磁场；掺杂
Key words：titanium dioxide; photochemical catalysis; magnetic field; doping
摘 要：利用外加匀强磁场辅助掺杂TiO2光催化降解偶氮胭脂红B溶液，通过实验探讨外加磁场对Fe3+和La3+掺杂TiO2薄膜光催化活性的影响。研究结果表明：外加磁场使掺杂Fe3+/TiO2薄膜的光催化活性降低，在磁感应强度为7 mT时，催化剂几乎完全失活，光催化降解率低于2.0%；而对于掺杂1.0% La3+/TiO2薄膜，在磁感应强度为30 mT时，光催化降解率达47.4%，比无外加磁场时高12%；磁场辅助对掺杂TiO2 光催化活性的影响与掺杂离子的磁导率有关。
Abstract: Effects of magnetic field on photo-catalytic degradation of azocarmine B with Fe3+ or La3+ doped TiO2 films were investigated. The results indicate that the photo-catalytic activity of Fe3+/TiO2 films is deactivation and the activity of La3+/TiO2 films is reactivation in magnetic field. The degradation rate of Fe3+/TiO2 films is less than 2.0% at 7 mT of magnetic induction. The degradation rate of doped La3+/TiO2 (1.0%) film achieves 47.4% at 30 mT of magnetic induction, which is more than 12% compared with that without applied magnetic field. The effect of permanent magnetic field on the photo-catalytic activity of doped TiO2 films is determined by the doping ion’s magnetic permeability and the magnetic intensity.
基金信息：中国博士后基金资助项目
湖南省博士后基金资助项目
