A microwave-assisted rapid route to synthesize ZnO/ZnS core–shell nanostructures via controllable surface sulfidation of ZnO nanorods

• DOI: 10.1039/c1ce05111c
• Publication Date: 2011-03-09T16:00:27Z
• Authors: Yong Hu; Huanhuan Qian; Yu Liu; Gaohui Du; Fumin Zhang; Libo Wang; Xiao Hu
• Keywords: Nanorod; Sulfidation

We demonstrate a new strategy for preparation of ZnO/ZnS core–shell nanorods via microwave-assisted in situ surface sulfidation ZnO nanorods. This is facile and rapid process, requiring only low level microwave irradiation (400 W), through which conformal ZnS nanoparticle layer deposited onto the nanorods, while retaining uniformity original as-prepared hybrid structures with excellent fidelity. Furthermore, thickness size shell can be conveniently varied or controlled by concentration organo-sulfur source thioacetamide (TAA). The products exhibit narrowed band gap strong orange luminescence at 621 nm, due to interstitial oxygen ion defect present hydrothermally grown ZnO. However, PL intensity gradually decreases increase shell, indicating charge transfer between two components hybrids. Further investigation has revealed that nanostructures possess significantly higher visible light photocatalytic activity twice mechanisms optimal reach maximum core-shell are proposed discussed. It believed this facile, scalable its application extended synthesize other oxide/sulfide (MOx/MSy) different applications.