Hierarchical ZnO porous microspheres and their gas-sensing properties

Weiwei Guo, Tianmo Liu, Jinxing Wang, Weijie Yu, Rong Sun, Yong Chen, Shahid Hussain, Xianghe Peng, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)


    Materials with hierarchical and porous architectures often take on novel functional features. Here, we fabricate successfully the Zn4(OH) 6CO3·H2O (ZCHH) microspheres which consist of the nanoflakes by using a simple hydrothermal process, and demonstrate that the ZCHH precursor can be transformed utterly to ZnO porous microspheres after calcination. Further comparative studies reveal that both urea and MEA play a critical role in producing such unique porous microspherical architecture. The likely formation mechanism of the porous microspheres is proposed based on the time-dependent experiments. As a consequence of the unique hierarchical and porous architecture, the microspheres show a large specific surface area due to the remarkable amount of petals and pores on them and therefore excellent gas-sensing properties.

    Original languageEnglish
    Pages (from-to)5919-5924
    Number of pages6
    JournalCeramics International
    Issue number5
    Publication statusPublished - 2013 Jul


    • Crystal growth
    • D. ZnO
    • Gas sensors
    • Porous materials

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Process Chemistry and Technology
    • Electronic, Optical and Magnetic Materials
    • Surfaces, Coatings and Films
    • Materials Chemistry


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