Graphene oxide-CuFe2O4 nanohybrid material as an adsorbent of Congo red dye
Adamantia Zourou,
Afroditi Ntziouni,
Nikolaos Adamopoulos,
Tiberiu Roman,
Fu Zhang,
Mauricio Terrones,
Konstantinos Kordatos
Affiliations
Adamantia Zourou
School of Chemical Engineering, National Technical University of Athens, 9 Iroon PolytechniouSt., Zografou 15780, Athens, Greece
Afroditi Ntziouni
School of Chemical Engineering, National Technical University of Athens, 9 Iroon PolytechniouSt., Zografou 15780, Athens, Greece; Corresponding authors.
Nikolaos Adamopoulos
School of Chemical Engineering, National Technical University of Athens, 9 Iroon PolytechniouSt., Zografou 15780, Athens, Greece
Tiberiu Roman
National Institute of Research and Development for Technical Physics, 47 Mangeron Boulevard, 700050 Iasi, Romania; Integrated Center of Environmental Science Studies in the North Eastern Region-CERNESIM, ''Alexandru Ioan Cuza'' University of Iasi, Carol I nr. 11 Blvd., 700506 Iasi, Romania
Fu Zhang
Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA 16802, USA
Mauricio Terrones
Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA 16802, USA; Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA; Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
Konstantinos Kordatos
School of Chemical Engineering, National Technical University of Athens, 9 Iroon PolytechniouSt., Zografou 15780, Athens, Greece; Corresponding authors.
This work evaluates the performance of graphene oxide (GO) - copper ferrite (CuFe2O4) nanohybrid in the removal of Congo Red (CR) dye from aqueous solutions. The adsorbent was prepared via a three-step method. Firstly, GO was produced via a modified Hummers method, using graphite powder as starting material. Following this, GO surface was treated with ionic surfactants, cetyltrimethylammonium bromide (CTAB) and poly(sodium-4-styrenesulfonate) (PSS). Subsequently, the functionalized GO was decorated with magnetic CuFe2O4 nanoparticles via an electrostatic self-assembly process using a solvothermal treatment. The as-synthesized CuFe2O4-GO nanohybrid was characterized by X-Ray Diffraction (XRD) Analysis, Fourier Transform Infrared (FT-IR) Spectroscopy, micro-Raman Spectroscopy, Thermogravimetric Analysis (TGA), Field Emission Scanning Electron Microscopy (FE-SEM), High-Resolution Transition Electron Microscopy (HR-TEM) with Energy Dispersive Spectroscopy (EDS) mapping, as well as, N2 Adsorption/Desorption measurements. We investigated the CR adsorption of the GO-CuFe2O4 nanohybrid at various initial CR concentrations and contact times. Both Langmuir and Freundlich models were employed to describe the adsorption isotherms, while the adsorption kinetics of CR by GO-CuFe2O4 were found to be pseudo-second order. Our results demonstrate that GO-CuFe2O4 is an attractive adsorbent for the efficient removal of CR dye from wastewater.
