Environmentally friendly terbium, europium, and terbium/europium-loaded garlic peels (Tb@GP, Eu@GP, and Tb/Eu@GP) were successfully synthesized and evaluated as biosorbents for the extraction of enrofloxacin (ENR) from aqueous solutions. Notably, it was found that the adsorption capacity of Tb/Eu@GP (769 mg g −1 ) for enrofloxacin was significantly enhanced compared with unloaded GP (29.8 mg g −1 ) and was superior over Tb@GP (580 mg g −1 ) and Eu@ GP (421 mg g −1 ). The high adsorption capacity of Tb/Eu@ GP reflected the efficiency and cost effectiveness of the adsorption process. In order to gain insight into the modification method and adsorption behaviors, Tb@GP, Eu@GP, and Tb/Eu@GP were fully characterized, and their adsorption kinetics, isotherms, and thermodynamics were investigated. Additionally, Tb/Eu@GP was found to be highly efficient at pH values ranging from 6.0 to 8.0. Besides, ultrapure water containing 5% ammonia could elute 98.1 ± 1.5% of the absorbed ENR from Tb/Eu@GP, and the reusability and regeneration test also revealed the sustainability of Tb/Eu@GP. Moreover, XPS analysis confirmed ligand exchange between the hydroxyl and the fluorine group of enrofloxacin might be the main mechanism in the adsorption process. This work demonstrated loading terbium and europium on agricultural byproduct could be a potential method for developing costeffective and eco-friendly biosorbents for fluoroquinolones.

A copper-catalyzed three-component difunctionalization of aromatic alkenes to access 1,4-naphthoquinone derivatives with diverse structures is described. Experiments show that the difunctionalization reaction is accompanied by ester exchange reaction with the solvent. In this method, α-bromocarboxylates are used as radical precursors and 2-amino-1,4-naphthoquinones as radical trapping reagents. The substrate scope is broad because various aromatic alkenes, 2-amino-1,4-naphthoquinones, and α-bromocarboxylates are employed in the reaction, and corresponding products are obtained in moderate to good yields.

Sodium superionic conductor (NASICON)‐type materials are getting more and more attention due to their high capacity and good cycling ability compared with other cathode materials in aqueous zinc ion batteries (AZIB). The present paper was to study the synthesis and electrochemical properties of two NASICON compounds of Na3V2(PO4)3 and Na3V2(PO4)2F3 and to understand the impacts of fluorine. Both Na3V2(PO4)3 and Na3V2(PO4)2F3 are synthesized by hydrothermal growth followed with annealing at 800°C in inert gas. With 3 mol/L Zn(CF3SO3)2 in water as electrolyte, Na3V2(PO4)3 offered a high storage capacity, while Na3V2(PO4)2F3 demonstrated a high discharge voltage though low storage capacity. It was also found that the storage capacity of Na3V2(PO4)2F3 increases with increased cycles; however, the compound undergoes a gradual phase transition. It is discussed possible approaches to attain both high discharge voltage and large capacity with good cycling stability.