Artículo de revista
Influence of copper doping on structural, morphological, optical, and vibrational properties of ZnO nanoparticles synthesized by sol gel method
Fecha
2020Registro en:
Surfaces and Interfaces 21 (2020) 100700
10.1016/j.surfin.2020.100700
Autor
Rojas Michea, Carolina
Morel, Mauricio
Gracia, Francisco
Morell, Gerardo
Mosquera, Edgar
Institución
Resumen
Cu-doped ZnO nanocrystals (with 0, 0.5, 1.0, 1.5, and 2.0 at.% Cu) have been successfully synthesized by a solgel
method. The influence of Cu content on the properties of ZnO nanoparticles have been studied by various
characterization techniques. XRD analysis reveals the formation of hexagonal wurtzite structure in all samples,
confirming the incorporation of Cu ions into the ZnO lattice. The crystallite size and unit cell volume are
modified with the Cu content. Morphology characterization by SEM and HRTEM revealed that Cu-doped samples
consist of mixture of nanoparticles and nanowires. The energy band gap of the samples was red shift due to Cu
incorporation in the ZnO lattice. The PL emission intensity of the Cu-doped samples decreases with increasing Cu
content. Vibrational spectroscopy confirms metal oxide bond formation and reveals stress present in the samples.
Under visible light illumination, the photocatalytic performance of all samples was studied by using methylene
blue as a model molecule.