【作者】 韦祎； 曹文斌； 冉凡勇； 李艳红；

【Author】 Wei Yi Cao Wenbin Ran Fanyong Li Yanhong (Department of Inorganic Nonmetallic materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083)

【机构】 北京科技大学无机非金属材料系；

【摘要】 本文以TiOSO4、CO(NH2)2、Fe(NO3)3·9H2O为原料,采用水热合成法制备了不同铁掺杂浓度的纳米TiO2粉体。采用XRD、BET、TEM、紫外-可见光漫反射等方法表征了所制备粉体的性能。制得的铁掺杂纳米TiO2的晶型为锐钛矿型, 晶粒度为10～20nm、比表面积为140～170 m2／g。紫外-可见光漫反射实验表明, 掺铁后的纳米TiO2的光响应范围扩展到了可见光区,吸收边红移至600nm。本文通过在可见光照射下对亚甲基蓝溶液的降解能力来表征掺铁TiO2的光催化性能。测试结果表明,当原料中Fe／Ti的浓度比为2％(原子分数)时,4g铁掺杂纳米TiO2经过3 h可将400 mL浓度为10 mg/L的亚甲基蓝溶液降解95％,4．5 h即可完全降解,具有良好的可见光光催化特性。更多还原

【Abstract】 Using TiOSO4, urea, and Fe(NQ3)3·9H2O as starting materials, Fe-doped nanoTiO2 powders have been prepared by hydrothermal synthesis. The as-synthesized powders were characterized by XRD, BET, TEM and UV-Vis reflectance spectroscopy. Results show that the powders were polycrystalline anatase, the grain size is ranged from 10 nm to 20 nm and the specific surface area is ranged from 140 m2/g to 170 m2/g. Absorption results of UV-Vis spectra indicate that the absorption edge of the Fe-doped TiO2 powders have red-shifted well into visible light region and achieved up to 600 run. The photocatalytic activities of Fe-doped TiO2 powders have been investigated by degradation of methylene blue under the irradiation of visible light ranged from 400 to 700 nm.更多还原