为改善氧化锡（SnO₂）的光催化性能，扩大其在印染废水处理领域中的应用，采用简单的水热合成法制备了新型磁性可回收氧化锡/磁性纳米洋葱碳（SnO₂/MCNOs）复合材料。采用SEM、XRD、XPS、UV-Vis DRS和FT-IR等分析手段对复合材料进行了研究，并用磁滞回线确定了所制备复合材料的顺磁性。选择10 mg/L的罗丹明B（RhB）作为典型的有机污染物来评价上述制备的复合材料的光降解效率。结果表明，SnO₂/MCNOs比纯SnO₂具有更好的光催化活性。最后，根据物理化学和光催化性能，提出了所制备复合材料对RhB的降解机理。

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.

师倩莹(1996-),女,硕士生,研究方向为光催化材料,756711713@qq.com