(廊坊师范学院 化学与材料科学学院，廊坊 065000)
摘 要: 采用电化学共沉积法制备了Ag3PO4/CNTs/Ni复合薄膜，运用扫描电子显微镜(SEM)、X射线衍射(XRD)、拉曼光谱、紫外-可见漫反射光谱(UV-Vis DRS)对其进行了形貌和结构特性的分析, 在可见光下分别考察了复合薄膜光催化降解罗丹明B和刚果红的性能。结果表明，最佳工艺制备的Ag3PO4/CNTs/Ni复合薄膜最外层为大小均匀的Ag3PO4球形颗粒，平均粒径为20~30 nm，而在其内层则为Ag3PO4和CNTs交错的网状结构。 Ag3PO4/CNTs/Ni复合薄膜的光催化活性和稳定性均明显优于纯Ag3PO4/Ni薄膜，且光催化降解罗丹明B的速率常数是纯Ag3PO4/Ni薄膜的2.14倍。这都归因于CNTs 的高导电性及其与Ag3PO4良好的协同效应，有效地促进了光生电子与空穴的分离。
关键字: Ag3PO4/CNTs/Ni复合薄膜；电化学共沉积；光催化；罗丹明B；反应机理
（Faculty of Chemistry and Material Science, Langfang Normal University, Langfang 065000, China）
Abstract:Ag3PO4/CNTs/Ni composite thin film electrodes were prepared using electrochemical co-deposition. The surface morphology and structural properties of the electrodes were characterized using SEM, XRD, Raman and UV-Vis DRS. The photocatalytic properties of Ag3PO4/CNTs/Ni composite thin films were investigated by degrading of rhodamine B (RhB) and congo red (CR) under visible light irradiation, respectively. The results show that spherical Ag3PO4 nanoparticles (average diameter of 20-30 nm) are distributed uniformly on the outermost layer of the composite film when the fabrication process is optimized. The inner layer is network structure which is composed of interlaced Ag3PO4 and CNTs. The Ag3PO4/CNTs/Ni composite thin films exhibit excellent photocatalytic activity with enhanced photocatalytic efficiency and good photostability compared with pure Ag3PO4/Ni thin film. The rate constant of RhB degradation over Ag3PO4/CNTs/Ni composite thin films is 2.41 times that of pure Ag3PO4/Ni thin film. The improvement is attributed to the conductive structure supported by CNTs and its good synergistic effect with Ag3PO4, which favors electron-hole separation and the removal of photogenerated electrons from the decorated Ag3PO4.
Key words: Ag3PO4/CNTs/Ni composite thin film; electrochemical co-deposition; photocatalysis; rhodamine B; reaction mechanism
