Abstract
We report an efficient and environmentally benign one-dimensional ZnO/In2S3 core/shell nanostructure to be used as a photocatalyst to overcome the drawback of low photocatalytic efficiency brought by electron–hole recombination and narrow photoresponse range. In2S3 nanoparticles were successfully grown on the ZnO nanorods by the surface functionalization method using citric acid as a surface-functionalizing agent. The photocatalytic activity under visible light to degrade rhodamine B (RhB) was enhanced by these core/shell nanostructures due to the formation of heterojunctions, which prolong the separation of photogenerated electrons and holes. The photocatalytic degradation of RhB dye was found to be 83.7, 2.7, and 35.0% for the ZnO/In2S3 core/shell nanorod arrays, ZnO nanorods, and In2S3 nanoparticles, respectively, under visible light irradiation. Photoconductivity studies showed a 6-fold enhancement in photocurrent (compared to the dark current) for the core/shell nanorod arrays. Moreover, these core/s...
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