Research

Vacuum-annealing induces sub-surface redox-states in surfactant-structured α-Fe2O3 photoanodes prepared by ink-jet printing


Reference:

Bondarchuk, A. N., Peter, L. M., Kissling, G. P., Madrid, E., Aguilar-Martínez, J. A., Rymansaib, Z., Iravani, P., Gromboni, M., Mascaro, L. H., Walsh, A. and Marken, F., 2017. Vacuum-annealing induces sub-surface redox-states in surfactant-structured α-Fe2O3 photoanodes prepared by ink-jet printing. Applied Catalysis B: Environmental, 211, pp. 289-295.

Related documents:

[img] PDF (Fe2O3_Paper_ACB_2016_1ff_revision_clean) - Repository staff only until 28 April 2019 - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (1575kB) | Contact Author

    Official URL:

    http://dx.doi.org/10.1016/j.apcatb.2017.04.047

    Related URLs:

    Abstract

    Transparent nano-structured hematite (α-Fe2O3) films of approximately 550 nm thickness on tin-doped indium oxide (ITO) have been obtained conveniently by ink-jet printing of a Fe(NO3)3/Brij® O10 precursor ink and subsequent annealing at 500 °C in air. When illuminated with a blue LED (λ = 455 nm, ca. 100 mW cm−2), the hematite films exhibited photocurrents of up to 70 μA cm−2 at 0.4 V vs. SCE in 0.1 M NaOH electrolyte. Thermal annealing in vacuum at 500 °C for 2 h increased photocurrents more than three times to 230 μA cm−2 in agreement with previous literature reports for pure hematite materials. These results suggest that a simple ink-jetting process with surfactants is viable. The effects of vacuum-annealing on the photoelectrical properties of α-Fe2O3 films are discussed in terms of a sub-surface state templating hypothesis based on data gathered from photo-transients, field emission scanning electron microscopy, X-ray photoelectron spectroscopy analysis, X-ray diffraction, photocurrent spectra, and cyclic voltammetry.

    Details

    Item Type Articles
    CreatorsBondarchuk, A. N., Peter, L. M., Kissling, G. P., Madrid, E., Aguilar-Martínez, J. A., Rymansaib, Z., Iravani, P., Gromboni, M., Mascaro, L. H., Walsh, A. and Marken, F.
    DOI10.1016/j.apcatb.2017.04.047
    Related URLs
    URLURL Type
    http://www.scopus.com/inward/record.url?scp=85018244547&partnerID=8YFLogxKUNSPECIFIED
    Uncontrolled Keywordshematite films,oxygen evolution,photoanode,solar energy,water splitting,catalysis,environmental science(all),process chemistry and technology
    DepartmentsFaculty of Science > Chemistry
    Faculty of Engineering & Design > Mechanical Engineering
    Research Centres & Institutes > Institute for Sustainable Energy and the Environment
    Research CentresCentre for Sustainable Chemical Technologies
    Centre for Power Transmission & Motion Control
    EPSRC Centre for Doctoral Training in Statistical Mathematics (SAMBa)
    ?? WIRC ??
    Centre for Nanoscience and Nanotechnology
    RefereedYes
    StatusPublished
    ID Code55778

    Export

    Actions (login required)

    View Item