Fabrication of a novel magnetic carbon nanocomposite adsorbent via pyrolysis of sugar

Dong Wan Cho, Jechan Lee, Yong Sik Ok, Eilhann E. Kwon, Hocheol Song

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A new-fashioned fabrication recipe for a magnetic carbon nanocomposite (Fe3O4@C) via pyrolysis of sugar with magnetite (Fe3O4) nanoparticles was developed for the practical environmental application as an adsorbent. In order to synthesize Fe3O4@C, the thermal degradation of sugar was firstly investigated via thermo-gravimetric analysis (TGA) to explore the optimal pyrolytic conditions for fabricating Fe3O4@C. This study laid a great emphasis on the physicochemical characterization of pyrogenic Fe3O4@C through various analytical techniques, which experimentally validated that Fe3O4@C retained thin graphitic carbon layers containing carboxyl groups on the surface with the point of zero charge (pHpzc) of 7.5. Based on adsorption tests of methylene blue (MB), it was found the optimal mass ratio of sugar to Fe3O4 was 0.15 with pyrolysis temperature of 500 °C. The adsorption capacity of Fe3O4@C for MB was 52.6 mg g−1 and MB adsorption showed a strong pH dependence, which implies an active role of electrostatic interactions in the adsorption process. In regeneration experiments, Fe3O4@C retained 84% of its initial adsorption capacity after completing four consecutive adsorption cycles.

Original languageEnglish
Pages (from-to)305-312
Number of pages8
JournalChemosphere
Volume163
DOIs
Publication statusPublished - 2016 Nov 1
Externally publishedYes

Keywords

  • Adsorbent
  • Biochar
  • Carbon/FeO nanocomposite
  • Pyrolysis
  • Sugar

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

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