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        Fabrication of novel Fe2O3/MXene cathode for heterogeneous electro-Fenton degradation of sulfamethoxazole

        Huilai Liu,Minshu Cui,Yao Liu,Defeng Kong,Zhihao Li,Rohan Weerasooriya,Xing Chen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-

        Sulfamethoxazole (SMX) is a widely used antibiotic drug in medical applications resulting in its ubiquityin water and wastewater. Most of the treatment processes are inefficient in destroying SMX in water. Theheterogeneous electro-Fenton (EF)process shows promise in the non-selective degradation of antibioticdrugs in water and wastewater. Fe2O3/MXene-x (x is the ferric ion loading) was fabricated on 2DMXene carriers by hydrothermal method. The Fe2O3/MXene-x substrates were characterized by electronmicroscopic, X-ray, and molecular spectroscopic methods. Degradative products of SMX were identifiedby free radical quenching and LC-MS measurements. Electron micrographs show that Fe2O3 particulatesare uniformly distributed on MXene nanosheets. Fe2O3/MXene-x coated graphite was used as a cathodewith titanium anode for in situ generation of H2O2 required to produce free radicals (e.g. OH and O2 – ) todestroy SMX. Three possible SMX degradation routes by the electro-Fenton process were proposed. SMXand intermediates are eventually mineralized as CO2 and H2O. The new electrocatalyst shows reducedmetal ions leaching and good stability in repeated use cycles. This work offers a new electro-Fentonmethod to destroy antibiotic drugs in water and wastewater.

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