Highly Photocatalytic ZnO/In2O3 Heteronanostructures Synthesized by a Coprecipitation Method

We synthesized ZnO/In2O3 heteronanostructures by a coprecipitation method. Various characterization methods were employed to investigate the structures, morphologies, and photocatalytic properties. The roles of compositions and annealing temperatures on the photocatalytic activities have been systematically studied. The highest photocatalytic efficiency was observed when annealing at 800 degrees C with the Zn/In ratios of 1:1 in the starting materials. The charge separation process of these heterostructures was also discussed. And the effective separation of the photogenerated electrons and holes was regarded as the main reason for the high photocatalytic activity.