无机材料学报

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燃烧合成铁掺杂TiO2纳米晶的染料敏化光催化性能

赵尹, 李春忠, 刘秀红   

  1. 华东理工大学 材料科学与工程学院超细材料制备与应用教育部重点实验室, 上海 200237
  • 收稿日期:2006-12-12 修回日期:2007-01-31 出版日期:2007-11-20 网络出版日期:2007-11-20

Photosensitized Degradation Activity of Dye by Fe-doped TiO2 Nanocrystals
Synthesize via Gas Combustion Flames

ZHAO Yin, LI Chun-Zhong, LIU Xiu-Hong   

  1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
  • Received:2006-12-12 Revised:2007-01-31 Published:2007-11-20 Online:2007-11-20

摘要: 采用气相扩散火焰燃烧合成铁掺杂TiO2纳米晶, 研究了铁掺杂TiO2纳米晶在可见光辐照下降解罗丹明B的活性, 探讨了可见光染料敏化光催化机理. Fe3+掺杂可显著提高TiO2纳米晶的可见光催化活性, Fe3+最佳掺杂摩尔分数为0.12%. 经过铁掺杂改性后, Fe3+的3d电子也可被可见光激发引发光催化反应, 从而促进整个染料敏化光催化降解过程.

关键词: 火焰燃烧, TiO2, 纳米晶, 铁掺杂, 光催化

Abstract: Fe3+ doped TiO2 nanoparticles were synthesized by diffusion flame method. The activity of Fe-TiO2 nanoparticles on the photodegradation of RhB was investigated under visible light irradiation. And the photosensitized degradation mechanism was elaborated to demonstrate the improved photocatalytic activity of F-doped TiO2 nanoparticles. The best of photocatalytic activity of 0.12mol% Fe3+ doped TiO2 nanoparticles are attributed to the charge-transfer transition from 3d orbital of Fe3+ to the conduction band of TiO2 under visible light irradiation, which can lead to effectively hpotocatalytic reaction.

Key words: flame coumbustion, titanium dioxide, nanocrystals, Fe3+ doped, photocatalysis

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