A novel lead hexagonal ferrite (PbFe12O19) magnetic separation catalyst with excellent ultrasonic catalytic activity

Novel PbFe12O19 magnetic separation catalysts (PFOMSCs) with high specific activity were successfully synthesized by a polyacrylamide gel method with different Fe/Pb molar ratios. Regular lamellar PFOMSCs can be obtained by selecting a Fe/Pb molar ratio of 12:1 and sintering temperature of 500 degrees C. The colorimetric parameters and energy band values were independent of Fe/Pb mole ratio. The ultrasonic catalytic activity of PFOMSCs with diverse morphologies, different initial catalyst contents and dye concentrations for the degradation of Rhodamine B (RhB) dye under ultrasonic vibration were studied for the first time. The maximum degradation percentage of 89% and high specific activity of 0.015493 mmol/g/h for the PFOMSCs was found at 2 g/L of initial adsorbent concentration, 50 mg/L of initial dye concentration and 180 min of vibration time for removal of RhB from wastewater. The present work suggests that the PFOMSCs have excellent ultrasonic catalytic activity, with potential application for the removing RhB dye from wastewater. [GRAPHICS] .