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N-doped porous carbon with magnetic particles formed in situ for enhanced Cr(VI) removal

Journal Article


Abstract


  • A newly designed N-doped porous carbon with magnetic nanoparticles formed in situ

    (RHC-mag-CN) was fabricated through simple impregnation then polymerization and

    calcination. The doped nitrogen in RHC-mag-CN was in the form of graphite-type layers

    with the composition of CN. The resultant nanocomposite maintained a high surface area

    of 1136 m2 g1 with 18.5 wt% magnetic nanoparticles (Fe3O4 and Fe) inside, which showed a

    saturation magnetization (Ms) of 22 emu/g. When used as an adsorbent, the RHC-mag-CN

    demonstrated a very quick adsorption property for the removal of Cr(VI), during which 92%

    of Cr(VI) could be removed within 10 min for dilute solutions at 2 g L1 adsorbent dose. The

    high adsorption capacity (16 mg g1) is related to the synergetic effects of physical

    adsorption from the surface area and chemical adsorption from complexation reactions

    between Cr(VI) and Fe3O4. Importantly, the basic CNs in RHC-mag-CN increase its negative

    charge density and simultaneously increase the adsorption of metallic cations, such as

    Cr3þ formed in the acid solution from the reduction of Cr(VI). The formation of magnetic

    nanoparticles inside not only supplies complexing sites for the adsorption of Cr(VI), but

    also shows perfect magnetic separation performance from aqueous solution.

Authors


  •   Li, Yao (external author)
  •   Zhu, Shenmin (external author)
  •   Liu, Qinglei (external author)
  •   Chen, Zhixin
  •   Gu, Jiajun (external author)
  •   Zhu, Chengling (external author)
  •   Lu, Tao (external author)
  •   Zhang, Di (external author)
  •   Ma, Jun (external author)

Publication Date


  • 2013

Citation


  • Li, Y., Zhu, S., Liu, Q., Chen, Z., Gu, J., Zhu, C., Lu, T., Zhang, D. & Ma, J. (2013). N-doped porous carbon with magnetic particles formed in situ for enhanced Cr(VI) removal. Water Research, 47 (12), 4188-4197.

Scopus Eid


  • 2-s2.0-84879160211

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1002

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 4188

End Page


  • 4197

Volume


  • 47

Issue


  • 12

Place Of Publication


  • United Kingdom

Abstract


  • A newly designed N-doped porous carbon with magnetic nanoparticles formed in situ

    (RHC-mag-CN) was fabricated through simple impregnation then polymerization and

    calcination. The doped nitrogen in RHC-mag-CN was in the form of graphite-type layers

    with the composition of CN. The resultant nanocomposite maintained a high surface area

    of 1136 m2 g1 with 18.5 wt% magnetic nanoparticles (Fe3O4 and Fe) inside, which showed a

    saturation magnetization (Ms) of 22 emu/g. When used as an adsorbent, the RHC-mag-CN

    demonstrated a very quick adsorption property for the removal of Cr(VI), during which 92%

    of Cr(VI) could be removed within 10 min for dilute solutions at 2 g L1 adsorbent dose. The

    high adsorption capacity (16 mg g1) is related to the synergetic effects of physical

    adsorption from the surface area and chemical adsorption from complexation reactions

    between Cr(VI) and Fe3O4. Importantly, the basic CNs in RHC-mag-CN increase its negative

    charge density and simultaneously increase the adsorption of metallic cations, such as

    Cr3þ formed in the acid solution from the reduction of Cr(VI). The formation of magnetic

    nanoparticles inside not only supplies complexing sites for the adsorption of Cr(VI), but

    also shows perfect magnetic separation performance from aqueous solution.

Authors


  •   Li, Yao (external author)
  •   Zhu, Shenmin (external author)
  •   Liu, Qinglei (external author)
  •   Chen, Zhixin
  •   Gu, Jiajun (external author)
  •   Zhu, Chengling (external author)
  •   Lu, Tao (external author)
  •   Zhang, Di (external author)
  •   Ma, Jun (external author)

Publication Date


  • 2013

Citation


  • Li, Y., Zhu, S., Liu, Q., Chen, Z., Gu, J., Zhu, C., Lu, T., Zhang, D. & Ma, J. (2013). N-doped porous carbon with magnetic particles formed in situ for enhanced Cr(VI) removal. Water Research, 47 (12), 4188-4197.

Scopus Eid


  • 2-s2.0-84879160211

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1002

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 4188

End Page


  • 4197

Volume


  • 47

Issue


  • 12

Place Of Publication


  • United Kingdom