Synthesis of magnetic graphene oxide nanocomposite, and its application for preparation of adsorbent in removal of dye

Environmental pollution is one of the considerable issues that we are encountered by rapid industrialization, exponential population growth and incompetently planned urbanization. Dyes are momentous pollutants, which due to toxicity, carcinogenesis and mutagenesis lead to producing major perils to the human and other animals and microorganisms. Therefore, their removal from industrial and household effluents before discharge into the environment requires drastic attention. Adsorption is superior to other decholorization techniques because of simple design, easy operation, and high efficiency. Tremendous progresses in nanoscience and nanotechnology, enabling the synthesis of prominent and effective Nano adsorbents, have led to the enlargement of a variety of novel adsorption systems. In the past few years, graphene- based materials as the promising materials have been extensively explored for adsorption applications. The extremely high surface area, large delocalized pi (π) electrons, tunable chemical properties and easily modified surfaces of graphene and its related materials make them intriguing for use as adsorbents. In this research, first graphene oxide nano sheets were synthesized via a modified Hummers method, then the magnetic graphene nanocomposite was synthesized by hydrothermal and coprecipitating in tow steps. The synthesized nano materials were characterized and employed as the adsorbent for removal of dyes in environmental waters. The effects of experimental parameters on adsorption were studied. The synthesized nanocomposite exhibit excellent removal efficiency on optimum condition and rapid separation from aqueous solution by an external magnetic field.