نوع مقاله : مقاله کامل پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
In this study, zinc oxide (ZnO) nanorods were grown on substrates with and without a seed layer using a hydrothermal process. WO₃ nanoparticles were then coated onto the ZnO nanorods using the spin coating method. Techniques such as XRD, SEM, EDX, and UV-Vis DRS were employed to analyze the phase, microstructure, and photocatalytic properties. The results showed that the morphology of ZnO nanoparticles and nanorods, whether with or without a seed layer, significantly affected their photocatalytic properties. Additionally, the band gap size in the presence of WO₃ influenced the performance of the ZnO/WO₃ core-shell structure. ZnO nanorods with a seed layer exhibited a more uniform and orderly morphology compared to those without. The ZnO/WO₃ nanocomposite also improved dye photodegradation efficiency by enhancing electron-hole separation and reducing recombination. The experiments were designed and analyzed using the Taguchi method, which determined the number of experiments and assessed the effects of pH, time, initial methylene green concentration, and stirring speed on the photocatalytic degradation of methylene green by ZnO nanoparticles, nanorods, and the ZnO/WO₃ catalyst using ANOVA. The findings revealed that the initial methylene green concentration and pH had the most significant impact on the photocatalytic process, with removal rates reaching 70.2% for ZnO nanorods with a seed layer and 82.3% for the ZnO/WO₃ composite.
کلیدواژهها English