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以钛酸纳米管为载体、HAuCl4为金前驱体,通过浸渍-沉积法制备一维金修饰TiO2光催化剂(Au/TiO2)。通过X射线衍射和紫外-可见漫反射吸收光谱研究材料的结构和性质。以甲基橙溶液作为模拟废液,研究Au/TiO2材料在紫外光条件下的光催化活性。研究表明,由于金可以接受电子,从而促进光生电子和光生空穴的分离,使TiO2的光催化活性提高;Au/TiO2的光催化活性还与金的含量密切相关,金的最佳负载量为1%(质量分数)。
Using titanate nanotubes as the support and HAuCl4 as the gold precursor, one-dimensional gold-modified TiO2 photocatalyst (Au / TiO2) was prepared by impregnation-deposition method. The structure and properties of the materials were investigated by X-ray diffraction and UV-Vis absorption spectra. The photocatalytic activity of Au / TiO2 under ultraviolet light was studied using methyl orange solution as a simulated waste liquid. The results show that the photocatalytic activity of TiO2 is improved because of the electron acceptability of gold, which promotes the separation of photogenerated electrons and photo-generated holes. The photocatalytic activity of Au / TiO2 is also closely related to the content of gold. The optimal loading of gold is 1% (mass fraction).