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Erschienen in: Journal of Materials Science 12/2018

06.03.2018 | Ceramics

Studies of structural, optical, and electrical properties associated with defects in sodium-doped copper oxide (CuO/Na) nanostructures

verfasst von: Hafsa Siddiqui, Mohammad Ramzan Parra, M. S. Qureshi, M. M. Malik, Fozia Z. Haque

Erschienen in: Journal of Materials Science | Ausgabe 12/2018

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Abstract

In the present paper, we report a detailed study on the sodium (Na) doping-induced modifications in the copper oxide (CuO) nanostructure and its properties. A facile and sustainable sol–gel synthesis approach was employed for the preparation of high-quality pristine CuO- and Na-doped CuO nanostructures(1.0, 3.0, 5.0 and 7.0 mol% doping levels, CuO/Na) with controlled shape and composition. Due to the remarkable difference in the ionic radii of Cu2+ (0.73 Å) and Na+ (1.02 Å), Na+ substitution in place of Cu2+ generates strain/distortions in CuO lattice. The XRD analysis reveal the structural alteration from monoclinic to cubic symmetry with increase in doping level and also reveal the phase purity up to 3% doping level, and beyond this (i.e., for 5 and 7% doping level) small amount of impurity phase corresponding to Na2O was observed. The FTIR results further confirmed the presence of the Na–Cu–O stretching vibrations at higher Na-doped samples. Morphology of the samples indicates that the Na-doped CuO nanostructures exhibit less agglomeration compared to pristine CuO nanoparticles. The presence of Na in CuO lattice were found to greatly enhances optical and electrical properties owing to the formation of defects like copper vacancies and oxygen vacancies at the grain boundaries of the nanoparticles with increased doping of Na.

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Metadaten
Titel
Studies of structural, optical, and electrical properties associated with defects in sodium-doped copper oxide (CuO/Na) nanostructures
verfasst von
Hafsa Siddiqui
Mohammad Ramzan Parra
M. S. Qureshi
M. M. Malik
Fozia Z. Haque
Publikationsdatum
06.03.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 12/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2179-6

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