Grafting chelating groups on 2D carbon for selective heavy metal adsorption

Risa Shibahara, Kazuhide Kamiya, Yuta Nishina

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Iminodiacetic acid (IDA) is a tridentate ligand, which can capture metal ions by forming two fused five-membered chelate rings. In this study, we fixed IDA moieties onto a two-dimensional nanocarbon, graphene oxide (GO), to obtain materials with high and selective adsorption of metal ions. The synthesis conditions for the GO-IDA composites were optimized, then their structures were characterized by infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and CHN elemental analysis. In addition, the heavy-metal removal efficiency and selectivity of the GO-IDA composites with different length alkyl linkers between the GO and IDA were investigated. An aqueous solution containing 10 metal ions (Al, As, B, Cd, Cr, Cu, Mn, Pb, Se, and Zn) was used as a model for contaminated water at pH 7, and the interactions of the ions with GO-IDA were in the order of Cu > Pb > As > B > Zn > Al ≈ Se. The interaction between Cu and GO-IDA was confirmed by XPS and extended X-ray absorption fine structure (EXAFS), which showed that Cu was coordinated to IDA.

Original languageEnglish
Pages (from-to)5823-5829
Number of pages7
JournalNanoscale Advances
Issue number20
Publication statusPublished - Oct 21 2021

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • General Engineering


Dive into the research topics of 'Grafting chelating groups on 2D carbon for selective heavy metal adsorption'. Together they form a unique fingerprint.

Cite this