Synthesis of NENU metal-organic framework-graphene oxide nanocomposites and their pollutant removal ability from water using ultrasound

The cleaner production of metal-organic framework nanocomposite includes room/low temperature synthesis and the use of harmless solvents. In this paper, metal-organic framework (NENU: Northeast Normal University) - graphene oxide (GO) nanocomposites (NENU/GO) with different amounts of GO (0.005, 0.01, 0.015, 0.02 and 0.03 g denoted as NENU/0.005GO, NENU/0.01GO, NENU/0.015GO, NENU/0.02GO and NENU/0.03GO, respectively) were synthesized at room temperature using ethanol as a harmless solvent. The pollutant (dye) removal ability of the materials from water was studied in details. The GO nanosheet was prepared from graphite. The synthesized nanomaterials were characterized using Brunauer–Emmett–Teller, X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, transmission electron microscopy, and zeta potential. Dye removal at 5, 10 and 20 mg/L of dye concentration was 87, 84 and 59%, respectively. The pollutant adsorption capacity of the NENU, NENU/0.005GO, NENU/0.01GO, NENU/0.015GO, NENU/0.02GO and NENU/0.03GO was 125, 130, 151, 170, 183 and 243 mg/g, respectively. The pollutant uptake data confirmed the Freundlich isotherm and pseudo-second order kinetics.