Novel ternary mesoporous Co₃CsO₄-g-C₃N₄ nanocomposite as an efficient sorbent for Pb (II) and Cu (II) ions elimination

Eliminating heavy metal ions is of significant importance to the friendly evolution of the environment. Herein, a ternary Co₃CsO₄-g-C₃N₄ nanocomposite were successfully synthesized through a facile ultrasonication method. This new ternary nanocomposite was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS). The ternary Co₃CsO₄-g-C₃N₄ nanocomposite (CoCsCN) was tested in a binary system as a cost-effective adsorbent for eliminating Pb²⁺ and Cu²⁺ heavy metals. The effects of pH, the initial concentration of heavy metal ions, and contact time were analyzed to assess the nanomaterials’ removal efficiency. The Sips adsorption isotherm model was applied to the adsorption process in accordance with isotherm analyses. CoCsCN nanosorbent revealed a high adsorption capacity for Pb²⁺ (234.34 mg/g) and Cu²⁺ (221.26 mg/g). The present study showcases the efficacy of ternary CoCsCN nanocomposites in binary component systems for eliminating Pb²⁺ and Cu²⁺heavy metals from aqueous solutions.