Recovery of uranium (VI) from aqueous solutions by the polyethyleneimine-functionalized reduced graphene oxide/molybdenum disulfide composition aerogels

In this work, we have developed a facile route for the fabrication of polyethyleneimine-functionalized reduced graphene oxide/molybdenum disulfide composition aerogels (PEI-rGO/MoS2 CAs). The as-obtained nanomaterial (PEI-rGO/MoS2 CAs) is characterized by using scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy measurements. The different parameters regulating the adsorption of uranium (VI) such as contact time, pH and temperature are texted. The results show that the adsorption processes of uranium (VI) onto PEI-rGO/MoS2 CAs-3 are spontaneous and endothermic and well follow pseudo-second-order and Langmuir isotherm model. The equilibrium time and maximum adsorption capacity of PEI-rGO/MoS2 CAs-3 are 350 min and 184.53 mg g(-1). Therefore, PEI-rGO/MoS2 CAs holds the potential as promising adsorbent for the adsorption of uranium (VI). (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.