Carbon nanotube-based metal-ion catchers as supramolecular depolluting materials

Laura Maggini, Federica De Leo, Riccardo Marega, Hajnalka Mária Tóháti, Katalin Kamarás, Davide Bonifazi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Herein, we report the first example of supramolecular carbon nanotube (CNT)-based ion catchers as simple and effective tools for removing divalent metal ions from organic solvents. In particular, covalently functionalized multi-walled carbon nanotubes (MWCNTs) appended with pyridyl groups self-aggregate in solution into bundles in the presence of divalent metal ions (e.g., Cd2+, Cu2+, Ni2+, Pb2+, Zn2+). Such self-aggregation behavior leads to insoluble materials that, upon treatment with weak acids, can be regenerated and reused for further complexation. All materials and complexation/decomplexation steps were thoroughly characterized by using X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and different microscopy-based techniques, namely, transmission electron, scanning electron, and atomic force microscopy (TEM, SEM, and AFM). The supramolecular system engineered in this work is the first example of an easy and fully sustainable material with great potential applications for depolluting liquid waste from metal contamination.

Original languageEnglish
Pages (from-to)1464-1469
Number of pages6
JournalChemSusChem
Volume4
Issue number10
DOIs
Publication statusPublished - Oct 17 2011

Keywords

  • environmental chemistry
  • nanotubes
  • self-assembly
  • supramolecular chemistry
  • sustainable chemistry

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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  • Cite this

    Maggini, L., De Leo, F., Marega, R., Tóháti, H. M., Kamarás, K., & Bonifazi, D. (2011). Carbon nanotube-based metal-ion catchers as supramolecular depolluting materials. ChemSusChem, 4(10), 1464-1469. https://doi.org/10.1002/cssc.201100163