Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes

Tansir Ahamad, Mu Naushad, Gaber E. Eldesoky, Sameerah I. Al-Saeedi, Ayman Nafady, Nada S. Al-Kadhi, Ala Al-Muhtaseb, Azmat Ali Khan, Aslam Khan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

Original languageEnglish
Pages (from-to)154-161
Number of pages8
JournalJournal of Molecular Liquids
Volume282
DOIs
Publication statusPublished - May 15 2019

Fingerprint

Carbon Nanotubes
Poisons
Methylene Blue
methylene blue
Carbon nanotubes
Coloring Agents
Dyes
dyes
carbon nanotubes
Adsorption
adsorption
adsorbents
Adsorbents
Isotherms
isotherms
Kinetics
Chemical modification
kinetics
Reusability
Gibbs free energy

Keywords

  • Adsorption
  • Amino functionalized
  • MB dye
  • Multi-walled carbon nanotubes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes. / Ahamad, Tansir; Naushad, Mu; Eldesoky, Gaber E.; Al-Saeedi, Sameerah I.; Nafady, Ayman; Al-Kadhi, Nada S.; Al-Muhtaseb, Ala; Khan, Azmat Ali; Khan, Aslam.

In: Journal of Molecular Liquids, Vol. 282, 15.05.2019, p. 154-161.

Research output: Contribution to journalArticle

Ahamad, Tansir ; Naushad, Mu ; Eldesoky, Gaber E. ; Al-Saeedi, Sameerah I. ; Nafady, Ayman ; Al-Kadhi, Nada S. ; Al-Muhtaseb, Ala ; Khan, Azmat Ali ; Khan, Aslam. / Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes. In: Journal of Molecular Liquids. 2019 ; Vol. 282. pp. 154-161.
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abstract = "Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80{\%} of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.",
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AU - Ahamad, Tansir

AU - Naushad, Mu

AU - Eldesoky, Gaber E.

AU - Al-Saeedi, Sameerah I.

AU - Nafady, Ayman

AU - Al-Kadhi, Nada S.

AU - Al-Muhtaseb, Ala

AU - Khan, Azmat Ali

AU - Khan, Aslam

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N2 - Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

AB - Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

KW - Adsorption

KW - Amino functionalized

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