Abstract:

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%.

Key words: two-step method, photoactivity, TiO₂／ZnO, methyl orange