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Degradation of Rhodamine B by FeMnCoNi-O activated potassium persulfate |
XU Bang-li, YAN Hai-xian, WENG Shi-ya, WANG Shi-qi, FANG Feng |
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China |
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Abstract FeMnCoNi-O nanoparticles (NPs) with outstanding structural stability and catalytic performance were synthesized by coprecipitation and consequent calcination method. The FeMnCoNi-O NPs were carefully characterized by X-Ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analyzer (TG) and X-ray photoelectron spectroscopy (XPS) techniques. Furthermore, the obtained catalyst was applied to activate potassium persulfate (PMS) and degrade Rhodamine B (RhB). The effects of reaction conditions such as the concentration of the RhB, PMS and catalysts concentration, the kinds of pollutant and aqueous pH values, on the degradation process and the recycling performance were systematically investigated. Via the calcined treatment (200oC, 2h), the final product was the multi-metal oxide, which exhibited enhanced catalytic performance for the RhB degradation. FeMnCoNi-O NPs can achieve complete degradation of RhB (20mg/L) in 10minutes by activating trace amounts of PMS (0.2mmol/L). With the help of free radical quenching experiment and XPS analysis, it is found the main active substances in the degradation system were 1O2 and SO4·- generated via persulfate activation.
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Received: 01 July 2024
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