Synthesis of unique ZnO/SnO 2 core-shell structural microspheres and their gas-sensing properties

Weiwei Guo, Tianmo Liu, Rong Sun, Yong Chen, Wen Zeng, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)


    Nanomaterials with unusual architectures or morphologies often exhibit novel functional properties. Here, we apply a simple two-step solution method to synthesize the ZnO/SnO 2 microspheres with an average size of 1-2 μm, which exhibit a unique core-shell architecture with a uniform dispersion of SnO 2 nanoparticles on surfaces of spherical ZnO cores. We further investigate in detail the morphology evolution with reaction time, based upon which a likely growth mechanism is proposed. In property, the prepared core-shell structural ZnO/SnO 2 microspheres show excellent gas-sensing functions to ethanol gas of 50 ppm at an optimal temperature as low as 250 °C, rendering the hybrid microspheres a promising gas-sensing material for the on-site detection of ethanol.

    Original languageEnglish
    Pages (from-to)5-8
    Number of pages4
    JournalMaterials Letters
    Publication statusPublished - 2012 Dec 15


    • Crystal growth
    • Ethanol
    • Gas sensors
    • Microstructure
    • ZnO

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials


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