Three-dimensional ZnO hierarchical nanostructures: Solution phase synthesis and applications

Xiaoliang Wang, Mashkoor Ahmad, Hongyu Sun

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    Abstract

    Zinc oxide (ZnO) nanostructures have been studied extensively in the past 20 years due to their novel electronic, photonic, mechanical and electrochemical properties. Recently, more attention has been paid to assemble nanoscale building blocks into three-dimensional (3D) complex hierarchical structures, which not only inherit the excellent properties of the single building blocks but also provide potential applications in the bottom-up fabrication of functional devices. This review article focuses on 3D ZnO hierarchical nanostructures, and summarizes major advances in the solution phase synthesis, applications in environment, and electrical/electrochemical devices. We present the principles and growth mechanisms of ZnO nanostructures via different solution methods, with an emphasis on rational control of the morphology and assembly. We then discuss the applications of 3D ZnO hierarchical nanostructures in photocatalysis, field emission, electrochemical sensor, and lithium ion batteries. Throughout the discussion, the relationship between the device performance and the microstructures of 3D ZnO hierarchical nanostructures will be highlighted. This review concludes with a personal perspective on the current challenges and future research.
    Original languageEnglish
    Article number1304
    JournalMaterials
    Volume10
    Issue number11
    Number of pages24
    ISSN1996-1944
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Zinc oxide
    • Hierarchical nanostructures
    • Solution phase synthesis
    • Photocatalysis
    • Field emission
    • Sensor
    • Lithium ion batteries

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