Effect of particle shape and size on themorphology and optical properties of zinc oxide synthesized by the polyol method
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2018
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In this study we prepared zinc oxide (ZnO) nanoparticles using the polyol method with zinc acetate and/or sodiumacetate
in a propylene glycolmediumwith varied hydrolysis reaction time (10, 60 and 300min). Itwas observed
that the hydrolysis reaction time and the concentration of acetate ions had a strong effect on the
morphology and size of ZnO nanoparticles (NPs). X-ray diffraction (XRD) patterns revealed that all samples
crystalized in the typical ZnO wurtzite structure and Rietveld refinement was used to characterize the structure
and to suggest a preferential growth. Fourier transformed infrared spectroscopy (FTIR) was performed and
showed the typical ZnO band, no impurity signals, as well as differences in A1 and E1 vibrationmodes due to different
crystal growth in the structure. Raman scatteringwas carried out to determine the defects in the structure
of ZnO, such as interstitial oxygen and oxygen vacancies. Transmission electron microscope (TEM) images revealed
that ZnO NPs size and shape are strongly dependent on the hydrolysis reaction time and addition of acetate
counter ions, respectively. The change in shape and size has also affected the optical properties, such as the
optical bandgap (Eg) of ZnO NPs and their florescence.
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Polyol method, Defects, Zinc oxide, Optical properties, Control of shape and size
Citação
ALVES, T. E. P.; KOLODZIEJ, C.; BURDA, C.; FRANCOJR, A. Effect of particle shape and size on the morphology and optical properties of zinc oxide synthesized by the polyol method. Materials & Design, Amsterdam, v. 146, p. 125-133, 2018. DOI: 10.1016/j.matdes.2018.03.013. DisponĂvel em: https://www.sciencedirect.com/science/article/pii/S0264127518301862. Acesso em: 6 abr. 2023.