A greener route to photoelectrochemically active PbS nanoparticles

Javeed Akhtar, M. Azad Malik, Paul O'Brien, K. G U Wijayantha, R. Dharmadasa, Samantha J O Hardman, Darren M. Graham, Ben F. Spencer, Stuart K. Stubbs, Wendy R. Flavell, David J. Binks, Fausto Sirotti, Mario El Kazzi, Mathieu Silly

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    Abstract

    A cheap and more environmentally friendly method for the synthesis of high quality PbS nanoparticles in olive oil at 60 °C has been developed. Carefully controlling the conditions of reactions leads to PbS nanoparticles with well-defined sizes, and band gaps between 1.72 and 0.88 eV. The nanoparticles were characterized by XRD, HRTEM, NIR absorption spectroscopy, X-ray photoelectron spectroscopy (XPS) and a fluorescence lifetime experiment based on the time-correlated single photon counting (TCSPC) technique. Photoelectrochemical study carried out by steady-state current-voltage measurements of self-assembled PbS nanoparticles on ZnO-SnO2 electrodes in 1 M Na2SO3 electrolyte solution showed that as-prepared PbS nanoparticles were photochemically active. © The Royal Society of Chemistry 2010.
    Original languageEnglish
    Pages (from-to)2336-2344
    Number of pages9
    JournalJournal of Materials Chemistry
    Volume20
    Issue number12
    DOIs
    Publication statusPublished - 2010

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