摘要
采用溶胶-凝胶法制备了纯的和铁镧共掺杂的TiO2纳米粒子,对样品进行了X射线和紫外-可见吸收光谱分析。结果表明,500℃煅烧的未掺杂和共掺杂TiO2均呈锐钛矿结构,铁镧共掺杂抑制了TiO2粒径的长大,使TiO2的吸收带边红移且在可见光区的光吸收增强;光催化降解甲基橙表明,未掺杂的TiO2光催化活性高于P25,而适量铁镧共掺杂TiO2光催化活性进一步得到提高,最佳掺杂比是0.05%的Fe和0.5%的La。
A series of Fe, La co-doped and and characterized with XRD and UV-Vis un-doped TiO2 nanoparticles were prepared by sol-gel method absorption spectra. The result showed all samples calcined at 500 ℃ presented anatase structure. Co-doping restrained the increase of crystalline size, shifted the absorption profile of TiO2 to longer wavelength, and increased the absorbance in visible light region. Photocatalytic degradation of methyl orange showed that photocatalytic activity of un-doped TiO2 prepared was higher than that of P25,and appropriate content Fe, La co-doping further improved the photocatalytic activity of TiO2. The optimal doped content is 0.05% Fe and 0.5% La for the maximum photocatalytic degradation efficiency in this experiment.
出处
《应用化工》
CAS
CSCD
2008年第8期913-916,共4页
Applied Chemical Industry
关键词
二氧化钛
甲基橙
光催化
共掺杂
titanium dioxide
methyl orange
photocatalysis
co-doping
