Activated Carbon Furnished Monodisperse Pt Nanocomposites as a Superior Adsorbent for Methylene Blue Removal from Aqueous Solutions

Abstract

Adresses herein, monodisperse Pt nanoadsorbents have been reproducibly prepared by microwave assisted method and consist of activated carbon and platinum called as Mw-Pt NPs@AC nanocomposites. Mw-Pt NPs@AC nanocomposites were found to be extraordinary adsorption capacity for methylene blue (MB) removal from aqueous solutions. Their characterization was performed by the help of X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The results revealed that the Mw-Pt NPs@AC nanocomposites are highly efficient adsorbents for MB removal from aqueous solutions and provide remarkable adsorption capacity (195.69 mg/g). The MB adsorption equilibrium was attained in ~75 min. In addition, reusability tests represented that Mw-Pt NPs@AC nanocomposites are quite promising for MB removal keeping 91.9% of its initial efficiency after 5 cycles of adsorption–desorption.