The Influence of Ar on the Synthesis of Carbon-coated Copper Nanoparticles in Gaseous Detonation

Title:The Influence of Ar on the Synthesis of Carbon-coated Copper Nanoparticles in Gaseous Detonation

Volume: 14 Issue: 5

Author(s): Honghao Yan, Xiaofei Zhang, Xiaojie Li*Yang Wang

Affiliation:

• Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning,China

Keywords: Gas phase detonation, carbon-coated copper nanoparticles, argon gas, concentration, particle size, growth mechanism.

Abstract: Background: Carbon-coated metal nanoparticle is a kind of unique nuclear-shell material that is the carbon shell filled with metal particles. It has a great promising future in the application as excellent solid lubricants additives, conducting resin, antiradiation material and so on. As a mature technology, the gas detonation method has been widely used to synthesize various nanomaterials.

Method: Using copper acetylacetonate as a precursor to provide carbon and different concentrations of argon as a protective medium for the first time, high quality carbon-coated copper nanoparticles (Cu@C) were synthesized in hydrogen and oxygen. X-ray Diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM) were employed to characterize the structure, phase and constituent of the Cu@C nanoparticles to investigate the influence of argon concentration on the synthesis.

Results: The XRD pattern, Raman spectroscopy and TEM images confirm the effect of Ar on synthesizing Cu@C, especially on particle size. The minimum average size is around 13 nm, and most of the particle size distribution is in 5-10 nm range. When the argon concentration is high, the detonation process of H2 and O2 will be suppressed, which is not conducive to the graphitization.

Conclusion: Argon gas has a catalytic effect on the synthesis of high-quality Cu@C, which could significantly reduce the particle size of detonation products; the grain size appears an obvious downtrend with the concentration of argon increasing, but the high concentration of Ar is disadvantageous for the graphitization of carbon shells.

Cite this article as:

Yan Honghao , Zhang Xiaofei , Li Xiaojie *, Wang Yang , The Influence of Ar on the Synthesis of Carbon-coated Copper Nanoparticles in Gaseous Detonation, Current Nanoscience 2018; 14 (5) . https://dx.doi.org/10.2174/1573413714666180502130314