The Effects of ZnS Thickness on the Photocatalytic Performance of ZnO/ZnS Heterostructures

Abstract

Well aligned ZnO/ZnS heterostructures with different thichness of ZnS layer have been synthesized on ITO substrates by a simple SILAR method. The morphology properties of as grown heterostructures were investigated by SEM and TEM images. From the SEM and TEM results, the thickness of ZnS layer increased with the increased SILAR period. When SILAR period was 10 times, the chickens of ZnS layer was about 24 nm. ZnO/ZnS(10) structure shows the highest photocatalytic activity. Although ZnO/ZnS heterostructures do not show very high photocatalytic activity, ZnO/ZnS heterostructures will attract increased attention due to its multifunction and low cost.