Open AccessA greener route to photoelectrochemically active PbS nanoparticles
Author(s) -
Javeed Akhtar,
M. A. Malik,
Paul O’Brien,
K. G. Upul Wijayantha,
Ruvini Dharmadasa,
Samantha J. O. Hardman,
D. M. Graham,
Ben F. Spencer,
Stuart K. Stubbs,
Wendy R. Flavell,
David J. Binks,
Fausto Sirotti,
Mario El Kazzi,
Mathieu G. Silly
Publication year - 2010
Publication title -
journal of materials chemistry
Language(s) - English
Resource type - Journals
eISSN - 1364-5501
pISSN - 0959-9428
DOI - 10.1039/b924436k
Subject(s) - x ray photoelectron spectroscopy , high resolution transmission electron microscopy , nanoparticle , materials science , electrolyte , chemical engineering , absorption (acoustics) , nanotechnology , absorption spectroscopy , band gap , electrode , analytical chemistry (journal) , chemistry , optoelectronics , transmission electron microscopy , optics , chromatography , engineering , physics , composite material
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.
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