Abstract
Wastewater remediation using micro/nanomotors is a hot topic,and MnO2 based materials have become fascinating alternatives to rare noble metal-based micro/nanomotors.Herein,we demonstrate facile and large-scale synthesis of Fe-MnO2 core-shell micromotors for antibiotic pollutant removal.Heat-treatment results in a phase transformation of MnO2 with formation of iron oxides and partially exfoliates the MnO2 nanoplate shell structure to promote mobility.The iron-manganese oxide micromotors exhibit an efficient removal of tetracycline antibiotics via a combination of catalytic degradation and adsorptive bubble separation.For the first time,atomic H* was found to participate in the micromotor-assisted degradation process,resulting in optimal Fenton reaction in neutral conditions with a good decontamination performance.Owing to the merits of abundance,magnetic recovery,facile fabrication,good motion,and environmental friendliness,as well as decontamination performance in a wide pH range,these core-shell micromotors demonstrate a promising candidate in practical wastewater treatment.
NSTL