A series of promising visible light driven ZnFe 2 O 4 modified Al 2 O 3 −MCM‐41 nanocomposites were designed by wet impregnation method by loading different wt % (2, 6, 10) of ZnFe 2 O 4 on the surface of mesoporous Al 2 O 3 −MCM‐41. All the prepared photocatalysts were analyzed by using X‐ray diffractometers (XRD), Scanning electron microscope (SEM), N 2 sorption, Ultra violet‐Visible Diffuse reflectance spectroscopy (UV‐Vis DRS), X‐ray photoelectron spectroscopy (XPS), Fourier‐transmission infrared spectroscopy (FTIR) and High‐resolution transmission electron microscope (HRTEM) techniques to uncover and confirm the formation of phase, morphology and porous structure of the prepared nanocomposites. In the photo‐Fenton reaction, the ZnFe 2 O 4 modified Al 2 O 3 −MCM‐41 nanocomposites exhibit a significant catalytic activity for the photo‐Fenton degradation of phenol (40 min, 99%) via photocatalysis and photocatalytic reduction of Cr (VI) (60 min, 66%) under sunlight with an excellent reusability nature. The high photo‐Fenton activity of the composites is mainly attributed to mesoporosity and high surface area of support Al 2 O 3 −MCM‐41, proper light harvestation and increased charge transfer efficiency by active species ZnFe 2 O 4 , and suitable band edge potential for hydroxyl radical generation. The photo‐Fenton activities were further supported by the high photocurrent (0.29 mA/cm 2 ) generated by the nanocomposite ZnFe 2 O 4 modified Al 2 O 3 −MCM‐41. These results open up a new route for ZnFe 2 O 4 modified Al 2 O 3 −MCM‐41as an efficient photo‐Fenton catalyst for environmental remediation with superior activity and higher stability.
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Das et al. (2019) studied this question.
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