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

Costa, Demétrio A. S.; Mambrini, Raquel V.; Fernandez-Outon, L.E.; Macedo, W. A. A.; Moura, Flávia C.C.

doi:10.1016/j.cej.2013.05.099

Cited by 15 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results indicate that with increasing concentrations, adsorption percentage is increased (Figure a). This is because of the high driving force for mass transfer at the higher concentration range. ,, No more uptake was seen above 40 mg/L. This is because of saturation of all available active binding sites.…”

Section: Batch Experimentsmentioning

confidence: 97%

“…Metal oxide, owing to its small size, high surface area, and robustness is an ideal choice. Synthesis of various metal oxides was attempted by various methods such as sol–gel, chemical vapor deposition, co-precipitation, mechanical alloying, micelle synthesis, combustion, and microwave heating. − ,− ,− ,, Among all, the combustion method is easy, rapid, and cost effective. Such reactions are self-propagator and exothermic in nature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic Cobalt Oxide Nanoparticles: Sucrose-Assisted Self-Sustained Combustion Synthesis, Characterization, and Efficient Removal of Malachite Green from Water

Mohanta

Dey²,

Dey

2020

J. Chem. Eng. Data

View full text Add to dashboard Cite

Designing a stable and efficient adsorbent for removal of pollutants such as dyes is of serious concern nowadays. In view of that, magnetic cobalt oxide nanoparticles (CONP) were synthesized in a multigram scale using a modified self-propagator combustion method triggered by sucrose as the fuel. The material was characterized by Fourier-transform infrared spectroscopy, Xray diffraction, vibrating sample magnetism (VSM), scanning electron microscopy (SEM)−energy-dispersive system, highresolution transmission electron (HRTEM), pH ZPC , and Brunauer−Emmet−Teller surface area. SEM and HRTEM images confirm the presence of distinct pore channels. Room temperature VSM reveals weak hysteresis, indicating that the CONP is a soft but robust magnetic material. pH ZPC was found to be 6.45. Removal of malachite green from simulated water was tested in a batch mode and found to be promising. Physiochemical parameters such as pH, contact time, dose, and temperature were optimized. The maximum Langmuir adsorption capacity was found to be 238.10 mg/g. Adsorption is best described by the Langmuir isotherm model (R 2 = 0.999) and pseudo-second order kinetics (R 2 = 0.999). Regeneration (83%) with dilute acid enables its successive use. Its magnetic nature facilitates the rapid separation of the CONP after adsorption using a hand-held magnet. Easy synthetic protocols, robustness, high removal efficiency, and reusability make the material an ideal future choice for dye detoxification.

show abstract

Section: Batch Experimentsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Magnetic Cobalt Oxide Nanoparticles: Sucrose-Assisted Self-Sustained Combustion Synthesis, Characterization, and Efficient Removal of Malachite Green from Water

Mohanta

Dey²,

Dey

2020

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…Related cobalt magnetic nanoparticles coated by carbon (Co/C) were prepared by catalytic chemical vapour deposition (CCVD) with ethanol. 29 It was shown that in the CCVD process, cobalt oxide (Co 3 O 4 ) reacts with ethanol in the temperature range of 700-900 C to produce magnetic metallic cobalt coated by different carbon materials such as graphite and laments. The presence of multiwalled carbon nanotubes encapsulating a cobalt metal core was conrmed.…”

Section: Nano Zero-valent Iron (Nzvi) Other Metals and Alloysmentioning

confidence: 99%

Magnetic adsorbents based on micro- and nano-structured materials

2015

View full text Add to dashboard Cite

Micro-and nano-sized magnetic adsorbents on the basis of elemental metals, iron oxides, and ferrites, supported by inorganic (carbon, graphene, silica, zeolites) or organic (macromolecules, polysaccharides, polymers, biomolecules) compounds, are reviewed. Main attention is paid to magnetic hydrogels, xerogels, and aerogels due to their high number of environmental and biomedical applications. Role of carbohydrates and polysaccharides (starch, alginic acid, chitosan, etc.) for stabilization of magnetic nanoparticles and use the formed composites for adsorbtion purposes is described. Magnetic adsorbents are mainly used for heavy metals removal, separation, destruction and adsorption of oil, dyes, toxic organic compounds, several biomolecules and drugs, as well as widely in the catalytic processes. These last applications of magnetic adsorbents, in particular ferrites, are emphasized. Their main advantage for these or other possible applications is that the adsorbent or catalyst can be easily removed from reaction media after adsorption or completion of reactions via a simple magnet. Magnetic behavior studies of magnetic adsorbents are also discussed.

show abstract

“…Carbon-coated Co nanoparticles prepared by ethanol CVD were used as adsorbent for organic compounds. 40 However, the magnetic nanoparticles thereby obtained were not very uniform in particle size and were coated with several carbon shells, which made them unsuitable for adsorption applications. Furthermore, magnetic-metal nanoparticles have yet to be applied for use as multifunctional adsorbents for both organic and inorganic pollutants owing to their carbon-based structures.…”

Section: Introductionmentioning

confidence: 99%

Highly stable mesoporous silica nanospheres embedded with FeCo/graphitic shell nanocrystals as magnetically recyclable multifunctional adsorbents for wastewater treatment

et al. 2018

View full text Add to dashboard Cite

show abstract

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

Cited by 15 publications

References 37 publications

Magnetic Cobalt Oxide Nanoparticles: Sucrose-Assisted Self-Sustained Combustion Synthesis, Characterization, and Efficient Removal of Malachite Green from Water

Magnetic Cobalt Oxide Nanoparticles: Sucrose-Assisted Self-Sustained Combustion Synthesis, Characterization, and Efficient Removal of Malachite Green from Water

Magnetic adsorbents based on micro- and nano-structured materials

Highly stable mesoporous silica nanospheres embedded with FeCo/graphitic shell nanocrystals as magnetically recyclable multifunctional adsorbents for wastewater treatment

Contact Info

Product

Resources

About