Synthesis of Graphene Oxide/Metal‐Organic Frameworks Composite Materials for Removal of Congo Red from Wastewater

Abstract

Abstract In‐based metal‐organic frameworks (In–MOFs) and graphene oxide (GO)/ In–MOFs composite materials were obtained by trimesic acid (or 2‐aminoterephthalic acid), GO, and Indium chloride tetrahydrate milled microwave‐assisted ball milling. Scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and X‐ray diffraction (XRD) were applied to characterize the structure and thermostability of the synthesized composite materials. In addition, In–MOFs and GO/ In–MOFs were used for removal of organic dyes in water solutions. The adsorption and removal of Congo red (CR) in aqueous solution were studied. The adsorption capacity and behavior of GO/ In–MOFs towards CR were verified By studying the adsorption kinetics. The results showed that 55 mg/L of CR in a 200 mL solution was removed 90.83%, 90.40% and 96.27%, 95.02% by In–MOFs‐1, In–MOFs‐2, GO/In–MOFs‐1 and GO/In–MOFs‐2 within 240 min of treatment with natural light.