以硝酸镉和硫代乙酰胺为原料,在经浓硝酸处理过的碳纳米管(CNTs)表面原位生成硫化镉(CdS)纳米颗粒,制备了CdS/CNTs光催化剂。在可见光条件下比较了CdS/CNTs样品与简单混合的CdS-CNTs样品以及纯的CdS样品的光催化性能,讨论了CNTs对CdS光催化性能的增强机理。结果表明,CdS/CNTs样品对甲基橙的光催化降解性能与简单混合的CdS-CNTs样品以及纯的CdS样品相比有显著增强,说明CNTs在CdS/CNTs样品中起到了分离电子-空穴对的作用。 CdS / CNTs photocatalysts were prepared by in situ formation of cadmium sulfide (CdS) nanoparticles on the surface of concentrated nitric acid treated carbon nanotubes (CNTs) with cadmium nitrate and thioacetamide as raw materials. The photocatalytic performance of CdS / CNTs samples, simple mixed CdS-CNTs samples and pure CdS samples were compared under visible light conditions. The enhancement mechanism of CNTs on the photocatalytic activity of CdS was discussed. The results showed that the photocatalytic degradation of methyl orange by CdS / CNTs samples was significantly enhanced compared with that of CdS-CNTs samples and pure CdS samples. The results showed that CNTs could separate electron-hole in CdS / CNTs samples, The role of right