4.6 Article

Sustainable preparation of graphene-like hybrid nanomaterials and their application for organic dyes removal

Journal

CHEMICAL ENGINEERING SCIENCE
Volume 236, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2021.116482

Keywords

Graphene; Renewable precursors; Graphene-bentonite hybrid nanomaterial; Nanoindentation; Pollutants removal

Funding

  1. Natural Sciences and Engineering Council of Canada
  2. Quebec Centre for Advanced Materials (QCAM/CQMF) from Fonds de recherche du Quebec - Nature et technologies

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Graphene-like hybrid nanomaterials (GHNs) were successfully synthesized using sustainable and solvent-free method, with sucrose and bentonite renewable precursors. The characterization techniques confirmed the successful transformation of sucrose to sp2-hybridized carbon, and the hybrid nanomaterials showed potential for removing water pollutants.
Graphene-like hybrid nanomaterials (GHNs) were successfully synthesized through a sustainable and solvent-free method. Sucrose and bentonite renewable precursors were used as a carbon source and a template, respectively. The characterization of GHN by Raman nanoscale spectroscopy and X-ray photoelectron spectroscopy (XPS) confirmed the successful transformation of sucrose to sp2-hybridized carbon as in graphene. The high-resolution transmission electron microscopy (HR-TEM) analysis evidenced the formation of a hybrid nanomaterial in a well-defined layered structure. The nanoindentation studies show that the modulus of the pyrolyzed sugar was 4 GPa, while it was 28 GPa for the graphene layer synthetized with this procedure. These hybrid nanomaterials were evaluated as an adsorbent for the removal of both cationic (rhodamine B and methylene blue dyes) and anionic (methyl orange) organic water pollutants at 9.5-10 mg/g. These stiffer GHN increase the resilience, durability, and sustainability of the clay particles for treatment processes. Crown Copyright (c) 2021 Published by Elsevier Ltd. All rights reserved.

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