Title

Radiolytic Synthesis of Iridium Nanoparticles Onto Carbon Nanotubes

Abstract

Iridium nanoparticles on multiwalled carbon nanotubes were synthesized in a single-step process by gamma irradiation from a cobalt-60 source. These particles were prepared at various absorbed doses, precursors, and surfactant concentrations. The nanoparticles were homogeneously distributed onto the nanotubes' surface with average particle sizes between 2 and 5 nm. The particle size was found to decrease from 4.5 to 3.4 nm, when the absorbed dose increased from 20 to 60 kGy. An increase in the surfactant concentration also reduced the particle size from 3.8 to 2.5 nm. No significant variation in particle size was observed when the precursor concentration was increased. Although no Iridium-Carbon bonds were detected by X-ray Photoelectron Spectroscopy, Iridium-Oxigen bonds were observed. The interaction between the nanoparticles and the nanotubes seems to occur through oxygenated sites on the nanotubes' surface. © 2014 Springer Science+Business Media Dordrecht.

Department(s)

Mining and Nuclear Engineering

Keywords and Phrases

Carbon Nanotubes; Composite Nanomaterials; Gamma Irradiation; Iridium Nanoparticles; Radiation-Induced Chemistry; Radiolytic Synthesis

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Springer Verlag, All rights reserved.


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