Impact of Nb doping on gas-sensing performance of TiO 2 thick-film sensors

Wen Zeng, Tianmo Liu, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)


    Using a simple hydrothermal method, the pristine and Nb doped TiO 2 is prepared, and their microstructures and gas-sensing responses to the harmful volatile organic compounds are investigated with a special focus on the impact of Nb additive. We find that the gas response of TiO 2 is enhanced significantly by doping Nb, which is understood in theory upon proposed adsorption models. Combining experimental measurements with first-principles calculations, the working mechanism underlying such improvement in gas-sensing functions by the Nb additive is discussed.

    Original languageEnglish
    Pages (from-to)141-149
    Number of pages9
    JournalSensors and Actuators, B: Chemical
    Publication statusPublished - 2012 May 20


    • Nb doping
    • Oxygen adsorption
    • TiO
    • Volatile organic compounds

    ASJC Scopus subject areas

    • Instrumentation
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering


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