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铁、氮共掺杂二氧化钛粉末的制备及光催化活性 总被引:24,自引:0,他引:24
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. 相似文献
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铁、氦共掺杂二氧化钛薄膜的亲水性能 总被引:3,自引:0,他引:3
采用溶胶-凝胶法制备了铁掺杂TiO2(Fe-TiO2)薄膜,将Fe-TiO2薄膜放置氨气气氛中高温处理,形成铁、氮共掺杂TiO2(Fe/N-TiO2)薄膜.通过XRD、XPS、SEM、UV-Vis法进行吸收光谱分析及薄膜表面亲水接触角分析,研究了铁、氮掺杂浓度,热处理温度,膜厚等因素对薄膜亲水性能的影响.结果表明,Fe/N-TiO2(0.5%Fe,摩尔百分数)显示出更佳的亲水性能,在可见光下优势尤为明显.铁掺杂主要作用是降低电子和空穴的复合几率,氮掺杂可以增强TiO2薄膜在可见光区的吸收,两种效应相互结合,共同提高了薄膜在可见光下的亲水性能. 相似文献
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铁、氮共掺杂二氧化钛薄膜的亲水性能 总被引:5,自引:0,他引:5
采用溶胶-凝胶法制备了铁掺杂TiO2(Fe-TiO2)薄膜, 将Fe-TiO2薄膜放置氨气气氛中高温处理, 形成铁、氮共掺杂TiO2(Fe/N-TiO2)薄膜. 通过XRD、XPS、SEM、UV-Vis法进行吸收光谱分析及薄膜表面亲水接触角分析, 研究了铁、氮掺杂浓度, 热处理温度, 膜厚等因素对薄膜亲水性能的影响. 结果表明, Fe/N-TiO2(0.5%Fe, 摩尔百分数)显示出更佳的亲水性能, 在可见光下优势尤为明显. 铁掺杂主要作用是降低电子和空穴的复合几率, 氮掺杂可以增强TiO2薄膜在可见光区的吸收, 两种效应相互结合, 共同提高了薄膜在可见光下的亲水性能. 相似文献
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