Enhancement of NH3 sensing performance in flower-like ZnO nanostructures and their growth mechanism

Yu Zhang, Tianmo Liu, Jinghua Hao, Liyang Lin, Wen Zeng, Xianghe Peng, Zhongchang Wang

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    ZnO nanostructures hold substantial promise for gas-sensing applications owing to their outstanding ethanol sensing performance, yet their sensing performance toward NH3 has rarely been reported. Here, we report on a successful preparation of sunflower-like ZnO nanostructures and ZnO nanoparticle via a facile hydrothermal method, and demonstrate that the ZnO nanoflowers have high gas-sensing performances toward NH3 under a low concentration of 10-50 ppm. Further structural characterization reveals that the sunflower-like nanostructure comprises six triangles-like and one sphere-like nanostructures, and the triangle-like nanostructure is single crystalline with {0 0 1} crystal face. As a consequence of their unique morphology, the nanoflowers show much improved NH3 sensing performances than the nanoparticles with a high sensitivity of 49.5.

    Original languageEnglish
    Pages (from-to)31-36
    Number of pages6
    JournalApplied Surface Science
    Volume357
    DOIs
    Publication statusPublished - 2015 Dec 1

    Keywords

    • Gas sensor
    • Nanoflowers
    • Single crystalline
    • ZnO

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films

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