钒酸铁纳米棒的制备及光吸收性能研究

Synthesis and Optical Properties of FeVO_4 Nanorods

以Fe(NO3)3·9H2O和NH4VO3为原料,采用水热法制备了FeVO4纳米棒。采用X射线衍射(XRD),热重分析(TG),X射线光电子能谱(XPS)及场发射扫描电子显微镜(FE-SEM)对样品的物相组成和微观形貌进行了表征。并采用紫外-可见漫反射测试(UV-vis DRS)测定了样品的光吸收性能,DRS结果显示FeVO4纳米棒具有较宽的紫外-可见光吸收范围,结合Tauc方程计算得出FeVO4纳米棒的光学带隙为2.13 eV。光催化降价甲基橙性能测试显示经90 min紫外灯照射,对甲基橙的降解率为93.6%。

Using Fe（ NO3 ）3·9H2O and NH4VO3 as raw materials, FeVO4 nanorods were fabricated by a direct and simple hydrothermal process. The structure and morphologies of the as-prepared FeVO4 nanorods were characterized by X-ray diffraction （XRD）, thermogravimetric analysis （TG）, X-ray photoelectron spectroscopy （XPS）, and field-emission scanning electron microscopy （FE-SEM）. UV- visible diffuse reflectance spectrum （UV-vis DRS） shows that the as-prepared FeVO4 nanorods present strong absorption in a wide range from UV to visible light and the band gap was measured to be 2.13 eV. The photocatalytic activity of FeVO4 nanorods was characterized by degradation of methyl orange solution. The result indicates that the degradation rate reaches 93.6% after 90 min UV irradiation.