Fluidized bed chemical vapor deposition of copper nanoparticles on multi-walled carbon nanotubes

Abstract

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. A B S T R A C TMulti-walled carbon nanotubes tangled in easy-to-fluidize porous balls have been decorated by pure copper nanoparticles using a pre-industrial fluidized bed chemical vapor deposition process. Copper (II) acetylacetonate Cu(acac) 2 was used as precursor. The low precursor volatility led to low deposition rates, responsible for a nonuniformity of the deposit both on the MWCNT balls and from the outer part to the center of the balls. An oxidative pre-treatment of the MWCNTs allowed to increase slightly the deposit weight and uniformity, by creating new nucleation sites on the nanotube surface. It also allowed decreasing the size of Cu nanoparticles by a factor of ten. A decrease of the deposition temperature increased more markedly the deposit weight, by probably favoring the formation of gaseous reactive intermediate species more reactive on the oxidized nanotube surface. A more efficient precursor delivery system would allow reaching higher deposition rates and much more uniform deposits, making possible an industrial production of metallized carbon nanotubes.

Cu-MWCNT Kompozitlerinin Yapısal Özellikleri

“…This process is carried out by joining the metal and metal oxide nanoparticles into MWCNTs. Cu, Fe, Ni, Zn, Cu2O, ZnO, SnO2 have been used to make the MWCNTs metallized, these metals were planted, grafted or stacked to the structure or to the structure surface (Akbaba et al, 2018;Kumar et al, 2018;Lassègue et al, 2017). Electrodeless deposition, sonochemical deposition, liquid impregnation, deposition under supercritic fluid, chemical vapor deposition (CVD), chemical solution route, sol-gel, chemical precipitation, diffusion, solvo-thermal, wet chemistry, thermal decomposition reaction and gamma-irradiation techniques are used to metallize the MWCNTs (Kumar et al, 2018;Lassègue et al, 2017).…”

Towards the superlubricity of polymer–steel interfaces with ionic liquids and carbon nanotubes

“…Such an effect can be obtained by decorating CNTs with other nanoparticles, which, first, will hinder their mutual agglomeration, and secondly, will introduce new, beneficial properties to their structure [16]. Various examples of application of this solution can be found in medical diagnostics [17][18], comprising antibacterial remedies [19], or the production of multi-functional composites [20][21]. These possibilities have also been noticed concerning the possibility of improving the tribological properties of CNTs.…”

A review on the synthesis and applications of sustainable copper-based nanomaterials

“…21–23 It is well known that appropriate synthetic procedures are essential to obtain high-quality advanced NMs that possess unique and extraordinary properties. 24 The main strategies for synthesizing Cu and Cu-based NMs are chemical vapor deposition, 25 aqueous solution reduction, 26 micro-emulsion, 27 sonochemical reduction, 28 laser ablation, 29 metal vapor synthesis, 30 biological synthesis, 31 reverse micelles, 32 radiation-induced synthesis, 33 and the polyol method. 34 However, the synthesised Cu and Cu-based NMs are delicate due to the facile nature of their oxidation states (O.S.…”