Abstract
The construction of efficient and superior adsorbed materials for the precise removal of hazardous contaminants from water have gained significant attention by the scientific community. In this work, a facile bimetallic zeolitic-imidazolate framework (CoxZny-JUC-160) by using self-adjusted strategy (SAS) was developed to synthesize various N-doped Co-based hierarchical porous carbon composites through sacrificial template route. A series of highly porous magnetic materials with well-dispersed or reduced Co particle size have been fabricated by fine tuning the ratio of Co and Zn in the precursors. For the first time the effect of the Co/Zn ratio on the textural properties and drug adsorption performance of the resultant porous carbon composites have been investigated systematically. Remarkably, the optimal Co@NC-1/4-900 possesses large specific surface area, hierarchical pore structures, and well-distributed Co adsorption sites which facilitates the exposure of active Co center and realizes fast diffusion of amodiaquine (ADQ) molecules with record-high adsorption capacities (890.23 mg g−1). The presented synthetic strategy provides deep insights into the development of highly efficient recyclable magnetic adsorbent for the removal of contaminants.
An optimal highly porous N-doped magnetic hierarchical carbon adsorbent with numerous accessibility active Co adsorption sites and excellent recycling performance was prepared by in-situ pyrolysis of novel mixed-ligand bimetallic ZIFs through a facile self-adjusted strategy. [Display omitted]
•The N-doped Co-decorated magnetic hierarchical porous carbon composites were designed.•The title strategy product displayed record-high adsorption capacity toward drug contaminant.•The plausible adsorption mechanism for ADQ was studied in detail.