Abstract
Iron-doped zinc oxide nanostar was synthesized by the microwave-assisted surfactant-free hydrolysis method. The as-synthesized Fe-doped ZnO nanostars catalyst was fully characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (XRD), and diffuse reflectance UV-vis spectroscopy (UV-DRA). The photocatalytic activity of the photocatalyst was investigated for the photocatalytic degradation of Tropaeolin O under visible light irradiation. It is observed that the doping of Fe ions enhances the absorption of the visible light and thus the photocatalytic degradation rate of Tropaeolin O would increase. Despite the Taguchi orthogonal experimental design method, the photocatalytic conversion could be achieved at 99.8% in the Fe-doped ZnO catalyzed photodegradation reaction under the optimal reaction conditions of catalyst loading (30 mg), temperature (60°C), light distance (0 cm), initial pH (pH = 9), and irradiation time (3 h). The Fe-doped ZnO photocatalyst can also be easily recovered and directly reused for eight cycles with over 70% conversion.
Highlights
In the well-developed centuries, textile, paper, and other industries continuously discharge wastewater contaminated with organic dye, definitely harmful to human life and aquatic system
We reported the synthesis of iron(Fe-) doped Zinc oxide (ZnO) nanostars by a surfactant-free microwaveassisted hydrolysis towards the photocatalytic degradation of Tropaeolin O under visible light
The as-synthesized Fe-doped ZnO catalyst was fully characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and UV-DRA
Summary
In the well-developed centuries, textile, paper, and other industries continuously discharge wastewater contaminated with organic dye, definitely harmful to human life and aquatic system. [10], and silver (Ag) [11] were supported on ZnO to enhance the photocatalytic activity on the degradation of organic dye. These supported ZnO photocatalysts were only excited by UV light with a limited wavelength shorter than nm. Microwave irradiation is widely used as heating source which provides a fast and simple synthetic route to heat up the reaction system homogeneously In this present study, we reported the synthesis of iron(Fe-) doped ZnO nanostars by a surfactant-free microwaveassisted hydrolysis towards the photocatalytic degradation of Tropaeolin O under visible light. The photocatalytic durability of the Fedoped ZnO nanostars catalyst was examined
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