Abstract: A novel magnetically retrievable SnO2/magnetic carbon nano-onions (SnO2/MCNOs) composite is synthesized via a simple hydrothermal method, aiming to improve the photocatalytic performance of SnO2 and expand its application in the field of printing and dyeing wastewater treatment.The characteristics of the as-prepared materials are explored by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet visible light diffuse reflection (UV-vis DRS) and Fourier transform infrared spectroscopy (FT-IR) techniques, and the paramagnetic nature is determined by hysteresis loops measurements.Rhodamine B with a concentration of 10 mg·L-1 is chosen as typical organic pollutant to evaluate the photodegradation efficiency of the as-prepared composite.The results indicate that SnO2/MCNOs have a superior performance on photocatalytic activity than pure SnO2.A possible mechanism for the materials to degrade rhodamine B is proposed based on the physic-chemical and photocatalytic properties.
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