The stimulation of peroxymonosulfate via novel Co0.5Cu0.5Fe2O4 heterogeneous photocatalyst in aqueous solution for organic contaminants removal. (April 2023)

• Record Type: Journal Article
• Authors: Chen, Junyu; Rasool, Raqiqa Tur; Ashraf, Ghulam Abbas; Guo, Hai
• Is Part Of: Materials science in semiconductor processing. Volume 157(2023)
• Publication Date: 2023-04
• Subjects: Peroxymonosulfate -- Degradation -- Organic pollutants -- Visible light -- Advanced oxidation processes -- Photocatalyst; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2023.107321
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: The abundance of organic pollutants in the aqueous system has posed a serious threat to human health. Here, Co0.5 Cu0.5 Fe2 O4 magnetic nanoparticles (NPs) were successfully synthesized for antibiotic degradation. The properties of the as-prepared photocatalyst were tested by diverse characterization techniques. The effects of the concentration of photocatalyst (20–100 mg L −1 ) and peroxymonosulfate (PMS) (20–80 mg L −1 ), and the pH (3–9) of solution on the degradation of tetracycline (TC) in aqueous solution by Co0.5 Cu0.5 Fe2 O4 /PMS/light system were investigated comprehensively. The results showed that Co0.5 Cu0.5 Fe2 O4 NPs possessed remarkable photocatalytic performance over a wide pH range with the help of PMS and visible light irradiation. The degradation rate of TC could reach 86.0% at 40 min in the optimized conditions (TC = 10 mg L −1, catalyst = 60 mg L −1, PMS = 60 mg L −1, pH = 7). In addition, the active species quenching experiment demonstrated that h +, SO 4 –, and OH were generated in the degradation progress. Interestingly, h + served as a conqueror in the reaction system, which benefited from the increased separation capability of electron-hole pairs due to the role of PMS as an electron quencher. Meanwhile, an improved PMS-assisted photocatalytic degradation of the TC reaction mechanism has been presented. Various TC intermediates were also uncovered, and probable degradation pathways were proposed. Furthermore, the Co0.5 Cu0.5 Fe2 O4 /PMS/light system was able to degrade a variety of organic pollutants, including naproxen sodium, naproxen, carbamazepine, ofloxacin, and flurbiprofen. The excellent degradation of various organics and high recyclability underline potential applications of Co0.5 Cu0.5 Fe2 O4 NPs. Graphical abstract: Image 1 Highlights: Co0.5 Cu0.5 Fe2 O4 nanoparticles with excellent catalytic performances were designed. The best removal ratio of TC reaches 86% within 40 min in optimized condition. LED/PMS/Co0.5 Cu0.5 Fe2 O4 system could degrade TC over pH values of 3–9. The h + played the most critical role in the photodegradation process of TC. The as-synthesized Co0.5 Cu0.5 Fe2 O4 has long-term durability in recycling test.