Effect of various initial concentrations of CTAB on the noncovalent modified graphene oxide (MGNO) structure and thermal stability


MİNDİVAN F.

Materialpruefung/Materials Testing, cilt.59, sa.9, ss.729-734, 2017 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Sayı: 9
  • Basım Tarihi: 2017
  • Doi Numarası: 10.3139/120.111063
  • Dergi Adı: Materialpruefung/Materials Testing
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.729-734
  • Anahtar Kelimeler: CTAB, GO, intercalation, non-covalent modification, thermal stability
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

© 2017 Carl Hanser Verlag, München.Graphene oxide (GO) was prepared by oxidation reaction of graphite (GF) using the Hummers' method and modified by a cationic surfactant (cetyltrimethylammonium bromide - CTAB) followed by chemical reduction using hydrazine monohydrate (N2H4 × H2O) to obtain MGNO powders. The structural and thermal properties of GO and MGNO powders were studied using zeta potentiometer (ZP), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The results demonstrated that CTAB was successfully grafted onto the surface of the GO through non-covalent modification between CTA+ ions and GO for all MGNO powders. A reasonable improvement in thermal stability of the MGNO powders was also observed. FTIR results showed the successful intercalation of CTA+ ions for all MGNO powders. The optimum concentration of surfactant was found to be 120 mg × l-1 (MGNO-120) by using analysis results. The ease of synthesis of MGNO-120 with both excellent intercalation and thermal stability will greatly facilitate potential applications.