Reduced graphene oxide (RGO) and Ag nanoparticles were incorporated simultaneously with two-step anodic TiO₂ nanotube through anodization process, and their photocatalytic activity was investigated in the degradation of 2,4-dichlorophenol (2,4-DCP). Furthermore, the optical properties and photocatalytic degradation efficiency were examined as a function of Ag NPs concentration in Ag/RGO–TiO₂ nanotube. Morphological characterization showed that Ag NPs and RGO sheets were well-doped inside and outside the TiO₂ nanotubes’ walls. Meanwhile, X-ray diffraction and EDX analysis confirmed the existence of both Ag NPs and RGO. The optical investigation revealed that the incorporation of Ag NPs and RGO with TiO₂ nanotubes improved the light absorbance and the narrowing of TNT bandgap energy (from 2.85 to 2.35 eV). Therefore, among the various samples, Ag50/RGO–TNTs photocatalyst had the most optimal performance, degrading 96% and 66% of 2,4-DCP under UV and visible light irradiation, respectively. The kinetic study confirmed that degradation reactions over all photocatalysts followed zero-order kinetics. Finally, the recovery test of the optimum sample (Ag50/RGO–TNT) showed 6% reduction following 5-cycle photocatalytic degradation of 2,4-DCP under UV irradiation.

还原氧化石墨烯（RGO）和银纳米颗粒通过阳极氧化过程与两步阳极TiO ₂纳米管同时引入，并研究了它们在2,4-二氯苯酚（2,4-DCP）降解中的光催化活性。此外，根据Ag / RGO-TiO ₂纳米管中Ag NPs浓度的函数研究了光学性质和光催化降解效率。形态学表征表明，Ag NPs和RGO片材在TiO ₂纳米管壁的内部和外部掺杂良好。同时，X射线衍射和EDX分析证实了Ag NP和RGO的存在。光学研究表明，Ag NPs和RGO与TiO _2的结合纳米管改善了光吸收，并缩小了TNT带隙能量（从2.85到2.35 eV）。因此，在各种样品中，Ag50 / RGO-TNTs光催化剂具有最佳性能，在紫外线和可见光照射下，分别降解96％和66％的2,4-DCP。动力学研究证实，所有光催化剂的降解反应均遵循零级动力学。最后，最佳样品（Ag50 / RGO-TNT）的回收率测试表明，在紫外线照射下5,2光催化降解2,4-DCP后，还原度降低了6％。