| 铁、氮共掺杂二氧化钛粉末的制备及光催化活性 |
| Preparation and Photocatalytic Activity of TiO2 Powder Codoped with Iron and Nitrogen |
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| 摘要: |
| 关键词: 二氧化钛 铁、氮共掺杂 亚甲基蓝 光催化 |
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| Abstract: Using TiCl4 as the titanium source, nanoparticles of TiO2 doped with nitrogen(N-TiO2) were synthesized by triethylamine. TiO2 powder codoped with iron and nitrogen(Fe/N-TiO2) were prepared by adsorption-deposition of Fe3+ on N-TiO2 and calcining at 400 ℃ for 2 h. From the XPS results for N1s binding energy at 399.6 eV and 396.6 eV, it is proposed that the partial N atoms as substitution atoms replace for O atoms in TiO2 lattice. The onset of the absorption spectrum of Fe/N-TiO2 has a 45 nm red-shift compared with that of TiO2. The results of photocatalytic degradation of methylene blue solution indicate that Fe/N-TiO2(0.45% Fe3+) has a higher activity. Its photocatalytic activity is about 2 times as high as that of pure TiO2 under UV-light, and 3 times under sunlight. Doping of nitrogen in TiO2 enhances photoresponse in visible light region and doping of Fe3+ reduces the recombination of electrons and holes. Both of the above effects are beneficial for improving the performances of Fe/N-TiO2 photocatalyst. |
| Keywords: titania iron and nitrogren codoping methylene blue photocatalyst |
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| 黄东升,陈朝凤,李玉花,曾人杰.铁、氮共掺杂二氧化钛粉末的制备及光催化活性[J].无机化学学报,2007,23(4):738-742. |
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