One-pot rapid preparation of carbon-coated Co–Cu alloy composites via the gaseous detonation method

Abstract

Nano Co–Cu alloy is an important catalyst, which has an important practical value in the field of the petrochemical industry. In order to prepare carbon-coated Co–Cu alloy composites efficiently and conveniently, a gaseous detonation method was explored in the present paper. The mixture of cobalt acetylacetonate and copper acetylacetonate was used as a carbon source and metal source, and the mixture gas of hydrogen–oxygen and benzene–oxygen was used as an explosion source, respectively, to study the influence of explosion source on the phase and morphology of the nanopowders. The TEM and XRD analysis results indicated that the carbon-coated Co–Cu alloy composites were composed of CNTs and carbon-coated Co–Cu/Cu nanoparticles with core–shell structure. The explosion source would affect the morphology of the carbon-coated Co–Cu alloy composites but have little impact on the phase. The higher combustion heat of combustible gas would contribute to the preparation of carbon-coated Co–Cu/Cu nanoparticles with a core–shell structure and a larger particle size. The present study provides a novel means for the preparation of carbon-coated Co–Cu alloy nanomaterials.

Characterization and Mechanism Elucidation of Nano-TiO2 Composites Prepared by Gaseous Detonation Method

“…Nepal et al 16 used a C 2 H 2 −O 2 system to prepare different sizes and specific surface areas of nanographene by controlling the O 2 /C 2 H 2 molar ratio and discussed its industrial prospects. Dhaubhadel et al 17 prepared silica aerosols with diameters ranging from 22 to 90 nm by detonating SiH 4 with O 2 or N 2 O. Zhao et al 18 used a hydrocarbon-O 2 system to prepare carbon-coated nanoparticles such as carbon-coated cobalt and carbon-coated copper. He et al 19 used citric acid and urea as precursors to rapidly synthesize solid-state fluorescent carbon dots using gaseous detonation method and investigated its formation mechanism.…”