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. 2014 Aug 18;9(1):399.
doi: 10.1186/1556-276X-9-399. eCollection 2014.

Optical properties of ZnO/BaCO3 nanocomposites in UV and visible regions

Ali Khorsand Zak  1 , Abdul Manaf Hashim  2 , Majid Darroudi  3
Affiliations

Optical properties of ZnO/BaCO3 nanocomposites in UV and visible regions

Ali Khorsand Zak et al. Nanoscale Res Lett. .

Abstract

Pure zinc oxide and zinc oxide/barium carbonate nanoparticles (ZnO-NPs and ZB-NPs) were synthesized by the sol-gel method. The prepared powders were characterized by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis), Auger spectroscopy, and transmission electron microscopy (TEM). The XRD result showed that the ZnO and BaCO3 nanocrystals grow independently. The Auger spectroscopy proved the existence of carbon in the composites besides the Zn, Ba, and O elements. The UV-Vis spectroscopy results showed that the absorption edge of ZnO nanoparticles is redshifted by adding barium carbonate. In addition, the optical parameters including the refractive index and permittivity of the prepared samples were calculated using the UV-Vis spectra.

Pacs: 81.05.Dz; 78.40.Tv; 42.70.-a.

Keywords: Ceramic materials; Composite materials; Optical.

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Figures

Figure 1
Figure 1
XRD patterns of the synthesized ZnO and ZB nanoparticles.
Figure 2
Figure 2
Typical TEM image of the ZB20 nanoparticles and the corresponding size distribution histogram.
Figure 3
Figure 3
The reflectance spectra of the synthesized (a) ZnO, (b) ZB10, and (c) ZB20 nanoparticles. The inset shows the obtained optical bandgap using the Kubelka-Munk method.
Figure 4
Figure 4
Optical bandgap value of the synthesized (a) ZnO, (b) ZB10, and (c) ZB20 nanoparticles. The absorbance is shown in the inset.
Figure 5
Figure 5
The behavior of the refractive indexes and extinction coefficients calculated near the absorption edge. (a) ZnO, (b) ZB10, and (c) ZB20 nanoparticles.
Figure 6
Figure 6
The behavior of the real and imaginary parts of permittivity calculated near the absorption edge. (a) ZnO, (b) ZB10, and (c) ZB20 nanoparticles.
Figure 7
Figure 7
The Auger spectrum of the synthesized ZB20 nanoparticles.
See this image and copyright information in PMC

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