Preparation, characterisation and electrochromic property of mesostructured tungsten oxide films via a surfactant templated sol-gel process from tungstic acid

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    Abstract

    A novel kind of mesoporous tungsten oxide films (TOFs) has been prepared via a non-ionic surfactant templated sol-gel route from cheap and easy handling tungstic acid. Characterisations by means of various techniques, including XRD, TEM, SEM, ATR and DTA, confirm that the obtained mesostructures are composed of fine mesopores (2-3 nm) and thin pore walls. Compared with previously reported surfactant templated mesoporous TOFs, our initial evaluation on the electrochromic properties showed that the derived TOFs show greatly enhanced colouration efficiency of 44 cm2C-1 and faster colouration/bleaching speed of 10/2 s, respectively. Owing to the ordering of mesostructures delivered by our method, the mesostructural changes associated with the electrochemical reaction during the electrochromic cycling of such materials can be directly monitored by low-angle XRD measurements.

    Original languageEnglish
    Pages (from-to)19-28
    JournalJournal of Sol-Gel Science and Technology
    Volume54
    Issue number1
    DOIs
    Publication statusPublished - 1 Apr 2010

    Fingerprint

    tungsten oxides
    sol-gel processes
    Surface-Active Agents
    Sol-gel process
    Oxide films
    Tungsten
    oxide films
    Surface active agents
    surfactants
    preparation
    acids
    Acids
    color
    Nonionic surfactants
    bleaching
    Angle measurement
    Bleaching
    Differential thermal analysis
    Sol-gels
    thermal analysis

    Bibliographical note

    Author can archive post-print (ie final draft post-refereeing).

    Cite this

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    title = "Preparation, characterisation and electrochromic property of mesostructured tungsten oxide films via a surfactant templated sol-gel process from tungstic acid",
    abstract = "A novel kind of mesoporous tungsten oxide films (TOFs) has been prepared via a non-ionic surfactant templated sol-gel route from cheap and easy handling tungstic acid. Characterisations by means of various techniques, including XRD, TEM, SEM, ATR and DTA, confirm that the obtained mesostructures are composed of fine mesopores (2-3 nm) and thin pore walls. Compared with previously reported surfactant templated mesoporous TOFs, our initial evaluation on the electrochromic properties showed that the derived TOFs show greatly enhanced colouration efficiency of 44 cm2C-1 and faster colouration/bleaching speed of 10/2 s, respectively. Owing to the ordering of mesostructures delivered by our method, the mesostructural changes associated with the electrochemical reaction during the electrochromic cycling of such materials can be directly monitored by low-angle XRD measurements.",
    author = "Wei Wang and Yongxin Pang and Hodgson, {Simon N. B.}",
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    AU - Pang, Yongxin

    AU - Hodgson, Simon N. B.

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    AB - A novel kind of mesoporous tungsten oxide films (TOFs) has been prepared via a non-ionic surfactant templated sol-gel route from cheap and easy handling tungstic acid. Characterisations by means of various techniques, including XRD, TEM, SEM, ATR and DTA, confirm that the obtained mesostructures are composed of fine mesopores (2-3 nm) and thin pore walls. Compared with previously reported surfactant templated mesoporous TOFs, our initial evaluation on the electrochromic properties showed that the derived TOFs show greatly enhanced colouration efficiency of 44 cm2C-1 and faster colouration/bleaching speed of 10/2 s, respectively. Owing to the ordering of mesostructures delivered by our method, the mesostructural changes associated with the electrochemical reaction during the electrochromic cycling of such materials can be directly monitored by low-angle XRD measurements.

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