Ultrasound-assisted degradation of rhodamine B(RhB) organic dye onmagnetic ZnFe۲O۴-ZnS-ZSM-۵ nanocomposite catalyst from water media

Magnetic ZnFe۲O۴-ZnS-ZSM-۵ zeolite nanocomposite was successfully fabricated using hydrothermal route. The gained nanocomposite was identified via Field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, magnetic measurements, and Brunauere-Emmette-Teller. The outcomes affirmed the production of ZnFe۲O۴-ZnS-ZSM-۵ nanocomposite with the average crystallite size of ۱۴ nm. The aforementioned nanocomposite was utilized as a newly sonocatalyst for the degradation of rhodamine B (RhB) organic dye under ultrasound irradiation. The data revealed complete degradation of RhB (۲۵ mg/L) within ۱۲ min in the presence of ZnFe۲O۴-ZnS-ZSM-۵ nanocomposite and H۲O۲ (۴ mM). The trapping experiments demonstrated that •OH free radicals are the main active species in the degradation of RhB. Furthermore, sonocatalytic performance of the ZnFe۲O۴-ZnS-ZSM-۵ nanocomposite was higher than those of raw ZnFe۲O۴ and ZnS, illustrating that the combining ZnS with magnetic ZnFe۲O۴ could be a suitable choice to enhance its sonocatalytic performance. The nanocomposite could be magnetically separated and recycles without any observable change in its structure and activity even after four sequential cycles.

کلیدواژه ها:

ZnFe۲O۴-ZnS-ZSM-۵ ، Zeolite ، Nanocomposite ، rhodamine B (RhB) ، Degradation