A greener route to photoelectrochemical PbS nanoparticles

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 in electrodes in 1 M Na2SO3 electrolyte solution
showed that as-prepared PbS nanoparticles were photochemically active.

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