scholarly journals Multiwalled Carbon Nanotubes Decorated with Cobalt Oxide Nanoparticles

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
D. G. Larrude ◽  
P. Ayala ◽  
M. E. H. Maia da Costa ◽  
F. L. Freire
Keyword(s):  
Carbon Nanotubes ◽  
Cobalt Oxide ◽  
Multiwalled Carbon Nanotubes ◽  
Cobalt Nitrate ◽  
Oxide Nanoparticles ◽  
Nitrate Hexahydrate ◽  
Multiwalled Carbon ◽  
Cobalt Oxide Nanoparticles ◽  
Electron Microscopy Analysis ◽  
Average Size

Multiwalled carbon nanotubes (MWCNTs) synthesized by spray pyrolysis were decorated with cobalt oxide nanoparticles using a simple synthesis route. This wet chemistry method yielded nanoparticles randomly anchored to the surface of the nanotubes by decomposition of cobalt nitrate hexahydrate diluted in acetone. Electron microscopy analysis indicated that dispersed particles were formed on the MWCNTs walls. The average size increased with the increasing concentration of cobalt nitrate in acetone in the precursor mixture. TEM images indicated that nanoparticles were strongly attached to the tube walls. The Raman spectroscopy results suggested that the MWCNT structure was slightly damaged after the nanoparticle growth.

Anchoring cobalt oxide nanoparticles on to the surface multiwalled carbon nanotubes for improved supercapacitive performances

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48426-48432 ◽  
Author(s):  
Babasaheb R. Sankapal ◽  
Hemant B. Gajare ◽  
Swapnil S. Karade ◽  
Deepak P. Dubal
Keyword(s):  
Carbon Nanotubes ◽  
Cobalt Oxide ◽  
Multiwalled Carbon Nanotubes ◽  
Oxide Nanoparticles ◽  
Multiwalled Carbon ◽  
Cobalt Oxide Nanoparticles ◽  
Sem And Tem

SEM and TEM images of Co3O4 nanodots anchored on to the surface of multiwalled carbon nanotubes.

scholarly journals Electrical and rheological percolation behavior of multiwalled carbon nanotube-reinforced poly(phenylene sulfide) composites

2016 ◽  
Vol 51 (2) ◽  
pp. 199-208 ◽  
Author(s):  
B Ribeiro ◽  
RB Pipes ◽  
ML Costa ◽  
EC Botelho
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Three Dimensional ◽  
Polyphenylene Sulfide ◽  
Melt Mixing ◽  
Multiwalled Carbon ◽  
Single Screw Extruder ◽  
Percolation Behavior ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

Polyphenylene sulfide-based nanocomposites filled with unmodified multiwalled carbon nanotubes from 0.5 wt% to 8.0 wt% have been prepared by melt mixing technique with a single-screw extruder and hot press. Transmission electronic microscopy and scanning electron microscopy analysis were carried out in order to assess the multiwalled carbon nanotubes dispersion throughout the polyphenylene sulfide matrix. Electrical conductivity of the polymer was dramatically enhanced by about 11 decades between 2.0 wt% and 3.0 wt% of nanotubes, suggesting the formation of three-dimensional conductive network within the polymeric matrix. The storage modulus (G′) of neat polyphenylene sulfide presented an increase by two orders of magnitude when 2.0 wt% of pristine multiwalled carbon nanotubes was considered, with the formation of an interconnected nanotube structure, indicative of “pseudo-solid-like” behavior. In addition, percolation networks were formed when the loading levels achieve up to 1.5 wt% for multiwalled carbon nanotubes/polyphenylene sulfide composites.

scholarly journals Highly sensitive detection of phosphate using well-ordered crystalline cobalt oxide nanoparticles supported by multi-walled carbon nanotubes

2022 ◽  
Author(s):  
Shaimah Rinda Sari ◽  
Masayuki Tsushida ◽  
Tetsuya Sato ◽  
Masato Tominaga
Keyword(s):  
Carbon Nanotubes ◽  
Surface Water ◽  
Cobalt Oxide ◽  
Oxide Nanoparticles ◽  
Water Contaminants ◽  
Cobalt Oxide Nanoparticles ◽  
Highly Sensitive ◽  
Multi Walled Carbon Nanotubes ◽  
Highly Sensitive Detection ◽  
Walled Carbon Nanotubes

Phosphates are well-known groundwater and surface water contaminants, with even modest increases in their concentration contributing to the eutrophication of lakes and coastal waterways and thus potentially harming the environment....

Synthesis and characterization of nano sized cobalt oxide by precipitation method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Pavithra D ◽  
Sujatha K ◽  
Sudha A P
Keyword(s):  
Cobalt Oxide ◽  
Ammonium Oxalate ◽  
Cobalt Nitrate ◽  
Morphological Properties ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Average Crystalline Size ◽  
Co3o4 Nanoparticles ◽  
X Ray ◽  
Cobalt Oxide Nanoparticles

In the present work, cobalt oxide nanoparticles were prepared by using precipitation method. The cobalt nitrate [Co (No3)2] and ammonium oxalate [C2H8N2O4] were used as precursors for the synthesis of cobalt oxide nanoparticles and the resultant product was Calcinated at 400˚C for 2 hrs. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDAX) to analyze the structural and morphological properties. The XRD pattern of the synthesized cobalt oxide nanoparticles exhibits cubic structure with the average crystalline size of 8.06 nm. The functional groups of the synthesized nanoparticles were confirmed by using FTIR spectrum (400 to 4000 cm-1). In the synthesized sample and its purity were confirmed from EDAX spectrum. The surface morphology of the synthesized Co3O4 nanoparticles shows spherical morphology. The optical properties of the synthesized cobalt oxide nanoparticles were investigated by photoluminescence spectrum which shows a minor emission at around 440 nm.

Preparation and physico-biochemical characterization of (Fe‚ Co‚ Ni) oxide nanoparticles-decorated PANI–MWCNTs as peroxidase mimetics

2017 ◽  
Vol 41 (23) ◽  
pp. 14049-14052 ◽  
Author(s):  
Navvabeh Salarizadeh ◽  
Minoo Sadri ◽  
Farhood Heydari ◽  
Seyyed Salman Seyyed Afghahi
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Multiwalled Carbon Nanotubes ◽  
Biochemical Characterization ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Multiwalled Carbon ◽  
Magnetic Metal ◽  
Ni Oxide

A nanocomposite of multiwalled carbon nanotubes/polyaniline and magnetic metal oxide nanoparticles can be used to catalyze the oxidation of peroxidase substrates.

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