A facile, feasible, and green synthesis via an electrochemical exfoliation process was applied to synthesize nitrogen-doped MgO/graphene nanocomposite (N-MgO/G). The N-MgO/G nanocomposite was characterized by several analytical techniques including X-ray photoelectron spectroscopy, X-ray powder diffraction, transmission electron microscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, selected area electron diffraction, and elemental mapping analysis. N-MgO/G nanocomposite was then applied to adsorb lead metal ions (Pb2+) from aqueous solutions. The N-MgO/G nanocomposite demonstrated a remarkably high Langmuir maximum adsorption capacity (294.12 mg/g) for Pb2+ ions under the optimum experimental conditions at a pH of 5.13, time of 35 min, dose of 0.025 g, the concentration of 400 mg/L, and a temperature of 36 °C. Adsorption kinetics results fitted with a pseudo-second-order model and a thermodynamic study showed that Pb2+ adsorption is an endothermic process. The practical application of N-MgO/G was also investigated to test its applicability in real water samples collected from different sources such as deionized water, tap water, wastewater, and river water.
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The authors extend their appreciation to the DSR at Majmaah University.
The authors extend their appreciation to the Deanship of Scientific Research (DSR) at Majmaah University for funding this work under project No (RGP-2019-14).
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Husein, D.Z., Uddin, M.K., Ansari, M.O. et al. Green synthesis, characterization, application and functionality of nitrogen-doped MgO/graphene nanocomposite. Environ Sci Pollut Res (2021). https://doi.org/10.1007/s11356-021-12628-z
- Exfoliation process