【摘要】 通过工艺简单的水热法成功制备出N-CDs和不同含量N-CDs修饰的N-CDs-X@Nb₂O₅-AMMC纳米材料。对N-CDs-X@Nb₂O₅-AMMC进行XRD、SEM、TEM、FT-IR、XPS和UV-vis DRS等表征分析。结果表明，经过N-CDs改性之后Nb₂O₅-AMMC的带隙变窄，样品的吸收边红移和光吸收范围变宽，从而有利于提高光催化性能。另外，N-CDs减少了电子传输的阻力，有利于光生电子向N-CDs结构的转移，同时光生载流子的迁移及分离效率提高，有利于光催化反应的进行。与纯Nb₂O₅-AMMC相比，N-CDs-X@Nb₂O₅-AMMC在可见光下光催化降解TC-HCl的性能均有提高，其中样品N-CDs-1@Nb₂O₅-AMMC的降解效率最高，1 h内对TC-HCl的降解率能达到63.2%,是纯Nb₂O₅-AMMC的1.59倍。更多还原

【Abstract】 In this paper, N-CDs and N-CDs-X@Nb₂O₅-AMMC nanomaterials modified with different contents of N-CDs have been successfully prepared by a simple hydrothermal method. N-CDs-X@Nb₂O₅-AMMC was characterized by XRD, SEM, TEM, FT-IR, XPS, UV-vis DRS and so on, and the results indicate that the band gap of Nb₂O₅-AMMC is narrowed after N-CDs modification, and the absorption band edge of the sample shows redshift and wider light absorption range, which is conducive to improving the photocatalytic performance. In addition, N-CDs reduces the resistance of electron transport, which is conducive to the transfer of photogenerated electrons to the N-CDs structure. At the same time, the migration and separation efficiency of photogenerated carriers are improved, which is conducive to the photocatalytic reaction. Compared with pure Nb₂O₅-AMMC, N-CDs-X@Nb₂O₅-AMMC has improved photocatalytic degradation performance of TC-HCl under visible light, in which N-CDs-1@Nb₂O₅-AMMC has the highest degradation efficiency. The degradation rate of N-CDs-1@Nb₂O₅-AMMC for TC-HCl reaches 63.2% within 1h, which is 1.59 times of pure Nb₂O₅-AMMC.更多还原