【摘要】 以三聚氰胺为前驱体,以硝酸铁和硝酸钴为原料,采用热解法制备双金属掺杂石墨相氮化碳（g-C₃N₄）,对其进行傅立叶红外衍射光谱（FT-IR）,X射线衍射光谱（XRD）,氮气吸附-脱附图谱和电子扫描显微镜（SEM）等表征。结果显示,掺杂双金属并没有改变g-C₃N₄的晶体结构,且增加了g-C₃N₄的比表面积。在可见光下以罗丹明B为模型污染物,研究了双金属不同掺杂比例的g-C₃N₄的光催化降解性能。结果表明,当m(Fe（NO₃）₃∶m（Co（NO₃）₂）=8∶1,总质量为0. 01g时,120 min对罗丹明B的降解率达到89. 2%,是纯氮化碳的2倍。由反应动力学可得,其反应速率常数也达到纯g-C₃N₄的7倍。重复实验观察到催化剂具有较高的稳定性。更多还原

【Abstract】 Using melamine as precursor,ferric nitrate and cobalt nitrate were used as raw materials to prepare bimetallic doped graphite phase carbon nitride（ g-C₃N₄） by pyrolysis method.The catalysts were characterized by Fourier transform infrared spectroscopy（ FT-IR）,X-ray diffraction spectroscopy（ XRD）,isothermal nitrogen adsorption-desorption（ BET） and Electronic scanning microscope（ SEM）. The results showed that the Doped bimetal did not change the crystal structure of g-c3 n4 and increased the specific surface area of g-C₃N₄. The photocatalytic degradation performance of g-C₃N₄ with different bimetallic doping ratios was studied by using rhodamine B as a model pollutant under visible light.The results showed that when m( Fe（ NO₃）₃∶ m（ Co（ NO₃）₂） = 8 ∶1,the total mass was 0. 01 g,the degradation rate of rhodamine B at 120 min reached 89. 2%,which was 2 times than that of pure gC₃N₄. According to the reaction kinetics,the reaction rate constant is also 7 times that of pure g-C₃N₄. Repeated experiments showed that the catalyst had high stability.更多还原