Self-supporting crumpled graphene balls as stable and reusable adsorbents for solid-phase extraction

The substantial aggregation of pristine graphene nanosheets or the possible escape of graphene from the supporting materials decreases its powerful adsorption capacity and diminishes its practical applications in graphene-based solid-phase extraction (SPE). It is highly desirable for these graphene-based adsorbents to be dispersive, stable and reusable. In this study, we report the use of self-supporting crumpled graphene balls as stable and...