Graphene oxide--magnetite nanocomposite as an efficient and magnetically separable adsorbent for methylene blue removal from aqueous solution

Meral K., Metin O.

TURKISH JOURNAL OF CHEMISTRY, cilt.38, sa.5, ss.775-782, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 5
  • Basım Tarihi: 2014
  • Doi Numarası: 10.3906/kim-1312-28
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.775-782
  • Anahtar Kelimeler: Graphene oxide, Fe3O4 nanoparticles, composite sorbent, magnetic separation, dye removal, methylene blue, ANIONIC DYES, ADSORPTION, NANOPARTICLES, CHEMISTRY, MECHANISM, CARBONS
  • Atatürk Üniversitesi Adresli: Evet

Özet

We report a facile method to produce a magnetically separable graphene oxide-magnetite nanocomposite (GO-Fe3O4) and its adsorption performance in methylene blue (MB) removal from aqueous solution. The GO-Fe3O4 nanocomposite was synthesized by a solution-phase self-assembly method including the incorporation of monodisperse Fe3O4 nanoparticles (NPs) and GO in a dimethylformamide/chloroform mixture under sonication. The successfully decorating GO sheet with monodisperse Fe3O4 NPs was proved by TEM study. ICP-OES data of the GO-Fe3O4 nanocomposite show that the GO-Fe3O4 nanocomposite consists of 21 wt% Fe 3 O 4 NPs, which is su ffi cient for its magnetic separation from aqueous solution. The spectroscopic studies reveal that the GO-Fe3O4 nanocomposite is a highly efficient adsorbent for MB removal from aqueous solution, providing an adsorption capacity of 172.6 mg/g, and the equilibrium for MB adsorption is attained in similar to 70 min. Moreover, it is a magnetically separable and reusable material for MB removal from water, preserving 87% of its initial e ffi ciency after 5 successive runs.