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Synthesis of platinum group metals nanoparticles by gamma radiolysis

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dc.contributor.advisor Maaza, Malik
dc.contributor.advisor Gibaud, Alain, 1956-
dc.contributor.advisor Srinivasu, V. V. Cele, Takalani 2019-01-08T09:50:28Z 2019-01-08T09:50:28Z 2018-06
dc.identifier.citation Cele, Takalani (2018) Synthesis of platinum group metals nanoparticles by gamma radiolysis, University of South Africa, Pretoria, <>
dc.description.abstract 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. en
dc.format.extent 1 online resource (xxi, 185 leaves) : illustrations (some color), graphs en
dc.language.iso en en
dc.subject Platinum en
dc.subject Palladium en
dc.subject Rhodium en
dc.subject Osmium en
dc.subject Radiolysis en
dc.subject Metal nanoparticles en
dc.subject Gamma irradiation en
dc.subject Platinum group metals en
dc.subject.ddc 620.115
dc.subject.lcsh Nanoparticles -- Environmental aspects en
dc.subject.lcsh Nanostructured materials en
dc.subject.lcsh Nanotechnology en
dc.subject.lcsh Gamma rays en
dc.title Synthesis of platinum group metals nanoparticles by gamma radiolysis en
dc.type Thesis en
dc.description.department Physics en D. Lit. et Phil. (Physics) en

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