Micrometer-sized nanoporous tin dioxide spheres for gas sensing

Jan-Henrik Smått, M. Lindén, T. Wagner, C-D Kohl, M. Tiemann

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    17 Citations (Scopus)

    Abstract

    We report the synthesis of mesoporous tin dioxide (SnO2) materials with well-defined particle morphology. The products consist of uniform spheres with a diameter of 5 mu m. The spheres are hierarchically porous with two distinct pore modes of 5.0 nm and 52 nm, respectively. This special porosity is the result of a synthesis procedure which involves a 'hard templating' (nanocasting) process. The product forms an approximately homogeneous monolayer of spheres on a sensor substrate and shows promising response to methane gas with low cross-sensitivity to water. The structural properties and gas-sensing performance are compared with a mesoporous SnO2 material without defined morphology, prepared by a 'soft templating' procedure. (C) 2011 Elsevier B.V. All rights reserved.
    Original languageUndefined/Unknown
    Pages (from-to)483–488
    Number of pages6
    JournalSensors and Actuators B: Chemical
    Volume155
    Issue number2
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Gas sensor
    • Mesoporous
    • Nanocasting
    • Nanoporous
    • Tin dioxide

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