改性水热法制备的铁掺杂二氧化钛纳米颗粒对亚甲基蓝光催化降解性能的影响
Effect of Fe-doped TiO2 nanoparticle derived from modified hydrothermal process on the photocatalytic degradation performance on methylene blue.
作者信息
Li Zhijie, Shen Wenzhong, He Wensen, Zu Xiaotao
机构信息
Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610041, PR China.
出版信息
J Hazard Mater. 2008 Jul 15;155(3):590-4. doi: 10.1016/j.jhazmat.2007.11.095. Epub 2007 Nov 29.
Anatase Fe-doped TiO2 nanoparticles with 10-15 nm particles sizes were directly prepared with amorphous TiO2 nanoparticles and Fe(NO3)3.9H2O by hydrothermal method. The TiO2 crystallite grain sizes decreased with the increase of Fe contents. When Fe contents increased, the diffuse reflectance spectra of Fe-doped TiO2 nanoparticles displayed a red shift in the band gap transition. And the absorbing band edge moved to visible range when the Fe contents were more than 2 mol%. XPS analysis showed that Fe3+ was not on the surface of TiO2 nanoparticles, but inserting into the matrix interior. As a result, the photoactivity degradation of MB on Fe-doped TiO2 nanoparticles decreased.
采用水热法，以非晶态TiO₂纳米颗粒和Fe(NO₃)₃·9H₂O直接制备了粒径为10 - 15nm的锐钛矿型铁掺杂TiO₂纳米颗粒。TiO₂微晶粒径随铁含量的增加而减小。当铁含量增加时，铁掺杂TiO₂纳米颗粒的漫反射光谱在带隙跃迁处出现红移。当铁含量大于2mol%时，吸收带边移至可见光范围。XPS分析表明，Fe³⁺不在TiO₂纳米颗粒表面，而是插入到基体内部。结果，铁掺杂TiO₂纳米颗粒上MB的光活性降解降低。
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