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Guzman, Maribel
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article
Copper oxide nanoparticles doped with lanthanum, magnesium and manganese: optical and structural characterization
Abstract
<jats:p>Copper oxide (Cu<jats:sub>2</jats:sub>O) is a promising semiconductor for photovoltaic and photocatalytic applications since this material has a high optical absorption coefficient and lower band gap (2.17 eV). Doped lanthanum (La), magnesium (Mg) and manganese (Mn) Cu<jats:sub>2</jats:sub>O nanoparticles (Cu<jats:sub>2</jats:sub>O Nps) were prepared by a displacement reaction. The doped and undoped Cu<jats:sub>2</jats:sub>O Nps were characterized with scanning electron microscopy–energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet–visible spectroscopy. The EDS results confirm the presence of La, Mg and Mn in the Cu<jats:sub>2</jats:sub>O Nps. The XRD results confirm the formation a single cubic phase of Cu<jats:sub>2</jats:sub>O with a cuprite structure. TEM images confirm the formation of Nps with mean diameters between 12.0 ± 6.1 and 30.8 ± 11.0 nm. Doped and undoped Nps present a narrow band gap (2.40 eV), blue shifted with respect to bulk Cu<jats:sub>2</jats:sub>O.</jats:p>