Novel preparation of ferromanganese oxide based on hyperbranched polymer for peroxymonosulfate activation as a robust catalyst for the degradation of organic pollutants

Abstract

The goal of this work is to degrade different organic pollutants such as methylene blue (MB), tetracycline (TCH), and rhodamine b (RhB) as an organic contaminants via ferromanganese oxide (FeMnO 3 ) in an aqueous medium as a catalyst to activate peroxymonosulfate (PMS). Herein, the ferromanganese oxides (FeMnO 3 ) were synthesized via calcination of phenylene diamine methyl methacrylate hyperbranched polymer/FeMn-LDH composite ( G 2 /FeMn-LDH). The structure and surface characterizations of the prepared FeMnO 3 and G 2 /LDH were measured using the X-ray diffraction, FTIR, scanning electron microscope, BET, and X-ray photoelectron spectra. The FeMnO 3 showed the highest efficiency among all the tested samples (98 %) after 1h. The uncalcined composite ( G 2 /FeMn-LDH) showed close efficiency after 1h treatment in the first cycle compared with FeMnO 3 but does not keep its performance in the other successive cycles due to loss of their structure. The prepared FeMnO 3 showed an easily recycle advantage due to its magnetic property and stability. • Preparation of ferromanganese oxide (FeMnO 3 ) and its application in MB degradation. • Preparation of aramid hyperbranched polymer and its use as a direct agent for catalyst preparation. • The FeMnO 3 exhibited high catalytic activation of peroxymonosulfate. • The degradation efficiency of MB reached to 98% after 1 h. • The prepared material showed high catalytic stability after reusability test.