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通过声电阳极氧化-化学沉积的方法制备CdS修饰的TiO_2纳米管阵列,并对其进行形貌表征及光电性能和传质特性的研究。结果表明;相对于未修饰的TiO_2纳米管列电极,CdS纳米粒子的化学修饰在增强电极对可见光吸收能力的同时,可减小电荷载流子的迁移阻力而有效提高光生电荷的分离和传递速率。在超声场中进行化学沉积,CdS纳米粒子可在TiO_2纳米管壁上均匀沉积,使得传质阻力进一步降低而获得相对最大的光电流和电荷载流子密度(9.29×10~(19)cm~(-3))。
The CdS modified TiO 2 nanotubes arrays were prepared by the method of electro-anodic oxidation-chemical deposition. Their morphologies, optical properties and mass transfer properties were studied. The results show that compared with the unmodified TiO 2 nanotube column electrode, the chemical modification of CdS nanoparticles can enhance the absorption of visible light and reduce the charge transfer resistance of the charge carriers, and effectively improve the separation and transfer rate of photogenerated charges . CdS nanoparticles can be deposited uniformly on the wall of TiO 2 nanotubes, further reducing the mass transfer resistance and obtaining the maximum photocurrent and charge carrier density (9.29 × 10 ~ (19) cm ~ (-3)).