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. 2023 Jun 1;13(1):8936.
doi: 10.1038/s41598-023-33864-y.

Optimizing gamma radiation shielding with cobalt-titania hybrid nanomaterials

Islam G Alhindawy  1 , M I Sayyed  2   3 , Aljawhara H Almuqrin  4 , Karem A Mahmoud  5   6
Affiliations

Optimizing gamma radiation shielding with cobalt-titania hybrid nanomaterials

Islam G Alhindawy et al. Sci Rep. .

Abstract

Cobalt-doped titania nanocomposites were fabricated to be utilized for radiation shielding aims. The chemical composition of the composites was measured using the energy-dispersive X-ray spectrometer. Moreover, the structure of the composites was evaluated using the X-ray diffractometer, and the morphology of the fabricated composites was presented using the scanning electron microscope. Furthermore, the γ-ray shielding properties were estimated using the Monte Carlo simulation between 0.059 and 2.506 MeV. The linear attenuation coefficient of the fabricated composites decreased by factors of 93% for all samples by raising the incident γ-energy between 0.059 and 2.506 MeV. Moreover, the partial replacement of the Ti4+ by Co3+ slightly enhanced the linear attenuation coefficient from 0.607 to 0.630 cm-1 when the Co3+ increased from 0 to 3.7 wt%. The improvement in the linear attenuation coefficient causes an enhancement in other radiation shielding properties.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
The MCNP’s geometry as illustrated in the input file.
Figure 2
Figure 2
XRD diffraction pattern for the fabricated nanocomposites samples.
Figure 3
Figure 3
The crystal size of the fabricated nanocomposites samples.
Figure 4
Figure 4
Raman spectrum of the fabricated nanocomposites samples.
Figure 5
Figure 5
(a–c) SEM image for TiO2 nanoparticles, single doped TiO2 (Co-TiO2), and double doped TiO2 (Co-TiO2/C), respectively. (d–f) TEM image for TiO2 nanoparticles, single doped TiO2 (Co-TiO2), and double doped TiO2 (Co-TiO2/C), respectively.
Figure 6
Figure 6
Elemental analysis and mapping (EDX) of the fabricated TiO2 nanoparticles.
Figure 7
Figure 7
Elemental analysis and mapping (EDX) of the fabricated Co-TiO2 nanocomposite.
Figure 8
Figure 8
Elemental analysis and mapping (EDX) of the fabricated Co-TiO2/C nanocomposite.
Figure 9
Figure 9
The mass attenuation coefficient for the fabricated composites.
Figure 10
Figure 10
Variation of the mass attenuation coefficient (µm, cm2/g) versus the Ti concentrations at 0.103, 0.662, and 1.250 MeV.
Figure 11
Figure 11
The linear attenuation coefficient, half-value thickness, and lead equivalent thickness for the prepared composites.
Figure 12
Figure 12
Variation of the linear attenuation coefficient, half-value thickness, and lead equivalent thickness versus Ti and Co concentrations.
Figure 13
Figure 13
Comparison of the linear attenuation coefficient for the fabricated composites to the linear attenuation of previously reported compounds and commercial shielding glasses.
Figure 14
Figure 14
Dependence of the transmission factor and the radiation protection efficiency on the γ-photon energy for the fabricated composites.
Figure 15
Figure 15
Dependence of the transmission factor and the radiation protection efficiency on the composite thickness.
See this image and copyright information in PMC

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