以片状g-C₃N₄、六水三氯化铁、柠檬酸三钠和尿素为原料，聚丙烯酰胺为稳定剂，采用水热法制备Fe₃O₄/g-C₃N₄复合材料并作为过硫酸钠（PS）降解罗丹明B （RhB）的活化剂。通过XRD、SEM、EDS、FT-IR对样品结构、形貌与组成进行表征。考察Fe₃O₄与g-C₃N₄的质量比、活化剂质量、PS质量、溶液pH等对Fe₃O₄/g-C₃N₄活化PS降解RhB效果的影响。结果表明，与g-C₃N₄复合有效提高了Fe₃O₄的分散性和活化性能；在Fe₃O₄与g-C₃N₄质量比为3：4、Fe₃O₄/g-C₃N₄质量为50 mg、PS质量为20 mg、RhB溶液pH为2.1时，反应120 min RhB的降解率达到100%。Fe₃O₄/g-C₃N₄可用磁铁进行分离回收，循环使用5次，活化PS去除RhB降解率仍达95.5%。

Fe₃O₄/g-C₃N₄ composites,which are prepared by hydrothermal method through using g-C₃N₄ sheet,ferric chloride hexahydrate,trisodium citrate and urea as raw materials,and polyacrylamide as stabilizer,is used as an activator of sodium persulfate for the degradation of rhodamine B (RhB).The structure,morphology and composition of the composites are characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),Energy Dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR).The effects of the mass ratio of Fe₃O₄ to g-C₃N₄,the dosages of Fe₃O₄/g-C₃N₄ and PS,and pH value of RhB solution on the performance of Fe₃O₄/g-C₃N₄ activating PS for the degradation of RhB are investigated.Results show that the combination of Fe₃O₄ and g-C₃N₄ has significantly improved the dispersion and the activating performances of Fe₃O₄.The degradation rate of RhB can reach 100% in 120 min of oxidization with PS when the mass ratio of Fe₃O₄/g-C₃N₄ is 3:4,the dosages of Fe₃O₄/g-C₃N₄ and PS are 50 mg and 20 mg,respectively,and pH value of RhB solution is 2.1.The degradation rate of RhB by Fe₃O₄/g-C₃N₄ activated PS can still reach 95.5% after Fe₃O₄/g-C₃N₄ composites are separated and recovered by magnet for five times.

钟秦粤(1995-),女,硕士研究生,研究方向为功能材料制备及光催化,lakerslitaz@163.com