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Sonochemical and microwave-assisted polyol reduction methods were used to prepare PbSe and PbTe. Products prepared by both methods were compared and analyzed by XRD, EDX, TEM, HR-TEM, elemental analysis, FT-IR, and thermal methods (DSC and TGA). In both methods almost pure lead chalcogenide phases were prepared, which were almost free of carbon (<0.08%), but the morphology of the resultant nanoparticles was entirely different. The mechanism of formation for the lead chalcogenide nanoparticles for both microwave and sonochemical reactions is discussed.

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Nanocrystals of binary metal tellurides, such as PbTe, Ni 2 Te 3 , and Cu 7 Te 5 , are synthesized by the polyol method under microwave radiation and studied using X-ray powder diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and photoacoustic spectroscopy. Binary tellurides are formed only in the case when ethylene glycol is used as a reducing agent and only when the reaction is carried out under microwave radiation. No product is formed when the reactions are performed using a conventional technique of heating. The synthesis of the aforementioned metal tellurides is described, and the proposed mechanism of the reaction is discussed.

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