Enhanced gas sensing properties by SnO 2 nanosphere functionalized TiO 2 nanobelts

Wen Zeng, Tianmo Liu, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    153 Citations (Scopus)

    Abstract

    We report synthesis of hierarchical nanostructures of SnO 2 nanosphere functionalized TiO 2 nanobelts as a novel sensing material by a simple hydrothermal technique. A systematic comparison study reveals an enhanced gas sensing performance for the sensor made of SnO 2 and TiO 2 toward volatile organic compounds of several species over that of the commonly applied undecorated TiO 2 nanobelts. The improved gas sensing properties are attributed to the pronounced electron transfer between the hierarchical nanostructures and the absorbed oxygen species as well as to the heterojunctions of the SnO 2 nanospheres to the TiO 2 nanobelts which provide additional reaction rooms. The results represent an advance of hierarchical nanostructures in further enhancing the functionality of gas sensors, and this facile method could be applicable to many sensing materials.

    Original languageEnglish
    Pages (from-to)3544-3548
    Number of pages5
    JournalJournal of Materials Chemistry
    Volume22
    Issue number8
    DOIs
    Publication statusPublished - 2012 Feb 28

    ASJC Scopus subject areas

    • Materials Chemistry
    • Chemistry(all)

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