Magnetic adsorbent based on cobalt core nanoparticles coated with carbon filaments and nanotubes produced by chemical vapor deposition with ethanol

[Display omitted] •Cobalt magnetic nanoparticles coated by carbon were synthesized from ethanol.•Multiwalled carbon nanotubes encapsulating cobalt metal core.•Co/C nanoparticles have been used as an adsorbent of organic compounds.•The magnetic property can be useful for the separation after being us...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2013-08, Vol.229, p.35-41
Main Authors: Costa, Demetrio A.S., Mambrini, Raquel V., Fernandez-Outon, Luis E., Macedo, Waldemar A.A., Moura, Flavia C.C.
Format: Article
Language:English
Subjects:
Adsorbents
adsorption
Carbon
carbon nanotubes
chemical engineering
Chemical vapor deposition
Cobalt
encapsulation
Ethanol
Ethyl alcohol
Filaments
graphene
magnetic properties
methylene blue
Nanoparticles
Raman spectroscopy
temperature
thermogravimetry
transmission electron microscopy
vapors
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Cobalt magnetic nanoparticles coated by carbon were synthesized from ethanol.•Multiwalled carbon nanotubes encapsulating cobalt metal core.•Co/C nanoparticles have been used as an adsorbent of organic compounds.•The magnetic property can be useful for the separation after being used. Cobalt magnetic nanoparticles coated by carbon (Co/C) were synthesized by catalytic chemical vapor deposition (CCVD) with ethanol. X-ray diffraction, temperature programmed reduction, and magnetic measurements showed that in the CCVD process cobalt oxide (Co3O4) react with ethanol at temperatures between 700 and 900°C producing magnetic metallic Co coated by different carbon materials such as graphite, and filaments. Thermogravimetric analyses suggest that the higher the temperature of CCVD process the higher the carbon content in the samples. Raman spectroscopy and transmission electron microscopy images show the presence of multiwalled carbon nanotubes encapsulating a cobalt metal core. The produced Co/C nanoparticles have been used as an adsorbent of organic compounds using methylene blue dye as a model molecule. The magnetic behavior of the materials indicated a high saturation magnetization at room temperature. This magnetic property can be useful for the separation of the adsorbent from the reaction mixture, which may be recovered after being used in the adsorption process.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2013.05.099