▎ 摘　　要

The copper ion adsorption in wastewater treatment has gained increasing attention, which lies in the development of efficient adsorption materials. Herein, we demonstrated a novel class of macroscopic liquid-like three-dimensional (3D) graphene oxide (GO)-based derivatives for copper ion adsorption. To be specific, a supermolecular self-assembly process of GO in water induced by melamine and phytic acid, thus generating three-dimensional porous structural GO backbone. Then, the polyetheramine (M2070) and organosilane (KH560) were tethered via the covalent linkage, thus forming flexible oligomer species with silicon hydroxyl groups. Then, the oligomer species were attached to the surface of the GO backbone, yielding a novel class of black, homogenous GO-based derivatives. As expected, the liquid-like GO-based derivative presents the superior copper ion removal ability due to the synergistic effect of additions (melamine, phytic acid) and 3D porous structural backbone. More significantly, we presume that the rich libraries of organic oligomer species, together with other 2D nanosheets-based backbones (e.g., MXene, boron nitride, hydrotalcite, etc.), undoubtedly provide more convenience for the further construction of liquid-like 3D derivatives, eventually open a new era of advancing the development of novel adsorbents for heavy ions remove.