Superhydrophilic graphene-loaded TIO2 thin film for self-cleaning applications

Srinivasan Anandan, Tata Narasinga Rao, Marappan Sathish, Dinesh Rangappa, Itaru Honma, Masahiro Miyauchi

    Research output: Contribution to journalArticlepeer-review

    176 Citations (Scopus)

    Abstract

    We develop a simple approach to fabricate graphene-loaded TiO2 thin films on glass substrates by the spin-coating technique. Our graphene-loaded TiO2 films were highly conductive and transparent and showed enhanced photocatalytic activities. More significantly, graphene/TiO2 films displayed superhydrophilicity within a short time even under a white fluorescent light bulb, as compared to a pure TiO 2 film. The enhanced photocatalytic activity of graphene/TiO 2 films is attributed to its efficient charge separation, owing to electrons injection from the conduction band of TiO2 to graphene. The electroconductivity of the graphene-loaded TiO2 thin film also contributes to the self-cleaning function by its antifouling effect against particulate contaminants. The present study reveals the ability of graphene as a low cost cocatalyst instead of expensive noble metals (Pt, Pd), and further shows its capability for the application of self-cleaning coatings with transparency. The promising characteristics of (inexpensive, transparent, conductive, superhydrophilic, and highly photocatalytically active) graphene-loaded TiO2 films may have the potential use in various indoor applications.

    Original languageEnglish
    Pages (from-to)207-212
    Number of pages6
    JournalACS Applied Materials and Interfaces
    Volume5
    Issue number1
    DOIs
    Publication statusPublished - 2013 Jan 9

    Keywords

    • TiO
    • graphene
    • photocatalytic oxidation
    • self-cleaning
    • superhydrophilicity

    ASJC Scopus subject areas

    • Materials Science(all)

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