Synthesis of Magnetic Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 Nanoparticles: The Photocatalytic Effects on Organic Pollutants upon Irradiation with UV-Vis Light

Abstract

Magnetic Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 nanoparticles with different molar ratios of CeVO4 to other inorganic components were synthesized through co-precipitation with a sonochemical-assisted method. X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, vibrating sample magnetometry, and scanning electron microscopy (SEM) methods were used for the physico–chemical characterization of the obtained nanoparticles. As shown in the SEM images, the average sizes of the Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 nanoparticles that formed aggregates were approximately 50–70 nm and 80–100 nm, respectively. The photocatalytic performance of these nanoparticles was examined by measuring methylene blue degradation under visible light (assisted by H2O2). The sample with a mass ratio of 1:2:1 (Fe3O4/ZnWO4/CeVO4, S4) exhibited optimal photocatalytic performance, and thus this sample was subsequently used for the photodegradation of different organic pollutants upon irradiation with ultraviolet (UV) and visible light. Approximately 90% and 70% degradation of methyl violet and methylene blue, respectively, was observed after visible light irradiation. Additionally, the mechanism of the photocatalytic reaction was investigated by measuring ˙OH release under UV light in a system with terephthalic acid and by measuring the release of ˙O2−, ˙OH, and hole scavengers.

Synthesis of Fe3O4/CdWO4/carbon dots heterostructure with excellent visible light photocatalytic stability and activity for degradation of 4-nitrophenol and organic pollutant

“…In other words, photo induced electrons in excited CDs were introduced to Fe 3 O 4 /CdWO 4 . These findings are in compatible with the findings of Zhang et al [35].…”

A review on the applications of zinc tungstate (ZnWO4) photocatalyst for wastewater treatment

“…Some researchers went as far as increasing the number of dopants used by making it a ternary system, Marsooli et al (2020) synthesized the ternary nanocomposite Fe 3 O 4 /ZnWO 4 /CeVO 4 , the binary nanocomposite Fe 3 O 4 /ZnWO 4 and Fe 3 O 4 nanoparticles using the co-precipitation method with a sonochemical-assisted method and the results from all three were compared. It was observed from the XRD analysis that the crystallite size increases from 0.15, 36.3-58.7 nm for single, binary and ternary systems, respectively.…”

Synthesis Methods and Applications of Semiconductor Material ZnWO4 with Multifunctions and Multiconstructions

“…Under visible light irradiation, the degradation rate of RhB reached 100% within 120 min. Marsooli et al [ 74 ] prepared magnetic Fe 3 O 4 /ZnWO 4 /CeVO 4 nanoparticles. Under visible light irradiation, the degradation rates of methyl violet and MB were 90% and 70%, respectively.…”