Anodized stainless steel as a durable and stable catalyst for Photo-Fenton degradation of organic contaminants

This research explored the use of homogeneous SUS 304 L stainless steel as both anode and cathode in an electrochemical cell for Photo-Fenton degradation of organic contaminant in water. In order to obtain the optimal anodization condition for methyl orange (MO) degradation with the catalysts, the v...

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Bibliographic Details
Published in:Materials chemistry and physics 2024-03, Vol.315, p.129048, Article 129048
Main Authors: Park, Gunn, Chae, Hee-Hun, Moon, Deok Hyun, Park, Jae-Woo
Format: Article
Language:English
Subjects:
Anodization
Maghemite
Nanoporous
Photo-fenton
Stainless steel
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Summary:This research explored the use of homogeneous SUS 304 L stainless steel as both anode and cathode in an electrochemical cell for Photo-Fenton degradation of organic contaminant in water. In order to obtain the optimal anodization condition for methyl orange (MO) degradation with the catalysts, the voltage ranged of between 30 V and to 50 V and the anodization time ranged of from 20 min to 30 min were experimented. The anodization process was optimized at 50 V for 20 min, resulting in enhanced MO degradation. The presence of nanopores and oxide layers, mainly γ-Fe2O3 and Cr2O3, on the anodized surfaces were confirmed by various characterizations methods such as field emission electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier-transform (FTIR) and raman spectroscopy analyses. The anodized stainless steel electrodes demonstrated superior reusability and efficiency under acidic conditions. When compared with platinum electrodes, SUS 304 L stainless steel did not show a difference in degradation efficiency, indicating the potential for economic benefits. This research highlights the potential applications of SUS 304 L stainless steel as a catalyst for the photo-Fenton and cost-effective alternative for platinum cathode in anodization. [Display omitted] •Anodization using SUS 304 L as a replacement for Pt at the cathode was conducted.•Optimal anodization conditions are identified, enhancing MO degradation.•Nanopores and oxide layers on anodized surfaces were confirmed.•Catalyst performance tested in various pH, suitable for environmental use.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2024.129048