A greener route to photoelectrochemical PbS nanoparticles

Posted by Javeed on February 8, 2010 at 12:38am

A cheap and more environmentally friendly method for the synthesis ofhigh quality PbS nanoparticles in olive oil at 60 °C has beendeveloped. Carefully controlling the conditions of reactions leads toPbS nanoparticles with well-defined sizes, and band gaps between 1.72and 0.88 eV. The nanoparticles were characterized by XRD, HRTEM, NIRabsorption spectroscopy, X-ray photoelectron spectroscopy (XPS) and afluorescence lifetime experiment based on the time-correlated singlephoton counting (TCSPC) technique. Photoelectrochemical study carriedout by steady-state current–voltage measurements of self-assembled PbSnanoparticles on ZnO–SnO₂ in electrodes in 1 M Na₂SO₃ electrolyte solution showed that as-prepared PbS nanoparticles were photochemically active.

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http://www.rsc.org/Publishing/Journals/JM/article.asp?doi=b924436k