铁掺杂氮化碳的制备及其光催化性能研究

Preparation and photocatalytic properties of iron doped carbon nitride

采用硫酸亚铁和三聚氰胺为前驱体制备了不同铁掺杂量的石墨型氮化碳材料(Fe/g-C 3 N 4)。采用X射线衍射光谱(XRD)、傅里叶变换红外光谱(FT-IR)、电子扫描显微镜(SEM)等分析测试手段对制备的催化剂进行了表征.结果表明,铁掺杂改变了石墨型氮化碳(g-C 3 N 4)的光学性质。通过可见光催化降解亚甲基蓝(MB)的反应,研究了不同Fe掺杂量对g-C 3 N 4可见光催化性能的影响,结果表明,掺杂质量分数为0.5%的Fe/g-C 3 N 4光催化性能最佳;210 min内MB的降解率为35%,速率常数为0.00137 min-1,是纯石墨型氮化碳的1.8倍。

Graphite-type carbon nitride materials(Fe/g-C 3 N 4)with different iron doping amount were prepared by using ferrous sulfate and melamine as precursors.The prepared catalysts were characterized by X-ray diffraction(XRD),Fourier transform infrared(FT-IR)spectroscopy,and scanning electron microscopy(SEM).The results showed that the iron doping changed the optical properties of graphite-type carbon nitride(g-C 3 N 4).The effect of different Fe doping amount on the visible light photocatalytic performance of g-C 3 N 4 was studied by photocatalytic degradation of methylene blue(MB).The results show that the photocatalytic performance of Fe/g-C 3 N 4 with 0.5%doping is the best.The degradation ratio of MB is 35%in 210 minutes,and the rate constant is 0.00137 min-1,which is 1.8 times as high as that of pure g-C 3 N 4.