TiO_2/ZnO纳米光催化剂的制备及性能研究

通过二步法(阳极氧化法和水热法)得到结构规则、有序核-壳结构的TiO2/ZnO纳米复合材料,并利用SEM、UV-vis、TEM等方法对所制备的纳米复合材料进行了表征。以甲基橙为目标降解物,自然光为光源,研究了TiO2/ZnO纳米光催化剂的光催化活性。结果表明,TiO2/ZnO复合光催化剂能提高对太阳光的利用率,发现在降解液pH值为3、太阳光催化降解5 h时,催化剂的降解效果最好,降解率达90%。

Preparation and properties of TiO2/ZnO Photocatalyst

Highly ordered TiO2／ZnO nanocomposites with core-shell structure were successfully fabricated by a two-step method(anodic oxidation and hydrothermal method). The nanocomposites were analyzed by means of a scanning electron microscope (SEM), double beam UV-vis spectrophotometer and transmission electron microscope (TEM). The photocatalytic activity of the prepared material was tested by taking methyl orange as a pollutant on the model and natural light as the light source. The results showed that, TiO2／ZnO composite photocatalyst could improve the utilization of sunlight, and  could show the best  catalytic activity under the condition of pH=3 solution and degraded under the sun for 5 hours,  which reached to 90%.