Visible Light Photocatalytic Performance of Lithium Fluoride Modified TiO2
Abstract: LiF was used to modify the photocatalytic property of TiO2powders considering the special functionality of Li and F ions. The sample is obtained by hydrothermal method using TiO2 powder and LiF solution with different mole ratios. The samples were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectrometer (XPS). XPS results showed that F ions exist in the samples, no Li ion was detected due to the measuring limitation of XPS. Photocatalytic property of the samples was tested by the degradation of methyl blue. The best photocatalytic activity was realized with LiF and TiO2 molar ratio of 1:1, the degradation rate is nearly eighty percent after 250 minutes. XPS results revealed that the hydroxyl groups and F ions on the surface of TiO2 played important roles in the improvement of photocatalytic efficiency.
文章引用: 刘 浩 , 余大凤 , 鲍钰文 , 高 云 , 夏晓红 (2014) LiF修饰TiO2改善可见光催化性能研究。 纳米技术， 4， 8-11. doi: 10.12677/NAT.2014.41002
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