【摘要】 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)。更多还原

【Abstract】 By using hydrogen titanate nanotubes as support and HAuCl4 as gold precursor,one-dimensional Au/TiO2 catalyst were prepared by deposition-precipitation method.The prepared materials were characterized with X-ray diffraction(XRD),UV-visible diffuse reflectance spectra.By using methyl orange solution as wastewater,the photocatalytic activity of Au/TiO2 was investigated under irradiation of UV light.Photodegradation experimental results of Au/TiO2 indicate that gold can enhance the photocatalytic activity of TiO2.During the photodegradation process,gold nanoparticles act as electron acceptors and prevent the recombination of photogenerated charge carriers.The photocatalytic activity of Au/TiO2 is influenced by the gold content.It is found that the activity is the highest when gold content is 1wt%.更多还原