Abstract
Introduction: Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst, replacing the traditional Fenton catalyst system which has many disadvantages in experimental processes and industrial applications. In this study, we focused on the preparation of iron nanoparticles and their use when embedded in traditional supports, as well as tested their catalytic activity by modified Fenton-type oxidation of methylene blue (MB) substrate.
 Method: Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), X-ray diffraction (XRD) and UV-vis were used for physio-chemical characterization of the catalysts.
 Results: Iron nanoparticles were obtained in the reduction of iron salt by sodium borohydride (NaBH4), with particle size in the range of 4-5 nm. Fe-X (X represents C, Bentonite, Al2O3, or ZnO) was synthesized in high yield and applied to the Fenton oxidation of MB; approximately 99% conversion was observed in the case of Fe-C.
 Conclusion: Supported iron nanoparticles are active catalysts for the oxidation of MB; however, there are limitations if pH is above 3.
Highlights
Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst, replacing the traditional Fenton catalyst system which has many disadvantages in experimental processes and industrial applications
Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst which can replace the traditional Fenton catalyst system that has many disadvantages in experimental processes as well as in industrial applications 7
We describe the preparation of iron nanoparticles and their use as a new catalyst and impregnated into traditional supports, as well as evaluate their catalytic activities by modified Fenton-type oxidation of methylene blue (MB) substrate
Summary
Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst, replacing the traditional Fenton catalyst system which has many disadvantages in experimental processes and industrial applications. Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst which can replace the traditional Fenton catalyst system that has many disadvantages in experimental processes as well as in industrial applications 7. Both heterogenous and homogeneous Fenton catalysts show similar activity for the same amount of catalyst used. In order to improve the Fenton process, a number of reports have used supported iron catalysts for applications in drug sciences 9, treatment of heavy metal pollution 10, chemical catalysis 11, and industrial textile and dyes 12
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