An environmental friendly and simple approach to synthesis of Platinum (Pt), Palladium (Pd),
Rhodium (Rh) and Osmium (Os) nanoparticles via gamma radiolysis is demonstrated. Herein,
we report on the effect of gamma rays radiation on Platinum (Pt), Osmium (Os), Rhodium (Rh)
and Palladium (Pd) salts solutions for synthesis of nanoparticles. Pt, Os, Rh and Pd salts
solutions of different concentrations were exposed to intense gamma rays irradiation with doses
varying from 70 to 120 kGy. The metal ion salt solutions were easily converted into metal
nanoparticles (MNP) using radiolysis method. The radiolytic conversion effect produced MNP
suspended in the solution. For Pt, Pd and Rh a metal coating on the edges of the polypropylene
tube used as a container, was unexpectedly observed but not for the Os solution.
Physical/chemical properties of γ-ray produced nanoparticles were reported. UV-Vis
spectroscopy, X-ray diffraction (XRD) and High resolution transmission electron microscopy
(HRTEM) analyses confirmed that both the coating and the MNP correspond to the pure metal
coming from the reduction of the initial salt. HRTEM analysis shows the particles size and
particle distribution of the produced nanoparticles. Quantitative analysis of the XRD patterns
shows information about the size and stress of the converted metals. The functional groups in the
solvent are analysed by Fourier Transform Infrared spectroscopy (FTIR). The production of a
metal coating on polypropylene plastic tubes by gamma-rays irradiation is presenting an
interesting alternative to conventional techniques of metal deposition especially for coating the
inner part of a tube. / Physics / D. Lit. et Phil. (Physics)
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:unisa/oai:uir.unisa.ac.za:10500/25163 |
| Date | 06 1900 |
| Creators | Cele, Takalani |
| Contributors | Maaza, Malik, Gibaud, Alain, 1956-, Srinivasu, V. V. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 1 online resource (xxi, 185 leaves) : illustrations (some color), graphs |
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