Gas-sensing properties and mechanisms of Cu-doped SnO2 spheres towards H2S

Chenxi Wang, Wen Zeng, Longjing Luo, Peige Zhang, Zhongchang Wang

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    We report on the synthesis of pristine and Cu-doped SnO2 spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO2-based sensors toward H2S. We find that Cu doping can enhance significantly the gas response of SnO2 toward H2S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H2S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H2S and Cu-doped surface is stronger than that between adsorbed H2S and pure surface, which consequently improves gas-sensing performances of SnO2 toward H2S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO2.

    Original languageEnglish
    JournalCeramics International
    DOIs
    Publication statusAccepted/In press - 2016 Jan 19

    Keywords

    • Cu doping
    • First-principles calculation
    • Gas sensing
    • SnO spheres

    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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