Novel magnetic Carbon@BaBiFe12O19 photocatalyst for efficient pollutants degradation under peroxymonosulfate activation

Abstract

Mhexaferrite (BaFe12O19) is considered as a potential photocatalyst for PMS activation and water purification. However, as a first report, this study indeed provides a different preparation route in a diverse way to synthesize a novel Carbon@BaBiFe12O19 nanoparticles photocatalyst, which so far has not been reported in literature yet as a main objective of our study. The as-prepared Carbon@BaBiFe12O19 magnetic photocatalyst (NPs) was further used to explore the pollutants removal capacity by triggering peroxymonosulfate (PMS) under visible light irradiation. Methylene Orange (MO) removal capacity of the PMS/NPs/Light system reached 97.2% within 50 min. The enhanced efficacy of MO degradation can be ascribed to the effective generation of exceptionally reactive species, including O2•-, SO4•-, h+ and •OH. The study investigated various experimental parameters, such as the development of novel photocatalysts, PMS, light, pH level of the solution, type of pollutants, generation of active species, presence of inorganic anions, dosage of pollutants, water matrices, stability/recyclability, as well as the reaction mechanism for the NPs/PMS/Light system. Therefore, these findings explain how dopants (Bi-carbon) and faults affect the PMS-based photocatalytic water treatment performance. These intriguing discoveries indeed provide novel insights into the development and application of NPs that exhibit exceptional photocatalytic and chemical stability towards oxidative decontamination process.