Study on the Performance of Pod-Like Magnetic Carbon Nanotubes for the Degradation of Ranitidine
In this study,a novel carbon-based catalyst containing the nitrogen-doped carbon nanotubes(Fe3C@NCNTs)blended Fe3C nanoparticle was prepared by a facile one-pot calcination approach.The lattice structure,microscopic morphology,elemental composition and magnetic properties of the nanomaterial were analyzed by multiple characterization methods.The specific structure of the pod-shaped magnetic carbon nanotubes was favorable for electron transfer and prevented Fe3C from dissolving in solution.The Fe3C@NCNTs were used to activate peroxymonosulfate(PMS)for the degradation of the typical gastric drug ranitidine(RNT),which showed the highest catalytic performance at a calcination temperature of 800℃.The optimized reaction conditions resulted in the RNT degradation efficiency of Fe3C@NCNTs-800/PMS system of 97.68% within 20 min at an initial RNT concentration of 10 mg/L,a catalyst dosage of 0.3 g/L,a PMS concentration of 0.5 mmol/L and pH=7,with a reaction rate constant of 0.127 1 min-1.Moreover,the cycling experiments revealed that the heat treatment was beneficial to restore the catalytic activity of Fe3C@NCNTs and had no significant effect on its crystal plane.The reactive oxygen species quenching and capturing experiments exhibited that·OH,·SO4-,·O2-and 1O2 jointly participated in the degradation of RNT,proposing a possible electron transfer mechanism involved in this reaction system.In conclusion,this study provides a new perspective that adjusting the catalyst structure could effectively enhance the catalytic activity and recyclability,which has a promising application in the field of water pollution.
magnetic nanomaterialscarbon nanotubesperoxymonosulfateranitidinecatalysis
万方数据
维普
