What is the role of the FeCu/NC catalyst in the electro-Fenton degradation of lisinopril (LSN)?

Label:chem

Topic
Lisinopril (LSN) is an antihypertensive drug that is not metabolized and is excreted completely through urine, leading to its presence in wastewater. Conventional treatment methods are inefficient in removing LSN. Advanced oxidation processes (AOPs), particularly the electro-Fenton (EF) process, have shown promise in degrading such pollutants. The FeCu/NC catalyst is a bimetallic catalyst derived from metal-organic frameworks (MOFs) and is designed to enhance the stability and efficiency of the electro-Fenton process.
Answer
The FeCu/NC catalyst plays a crucial role in the electro-Fenton degradation of lisinopril by facilitating the activation of hydrogen peroxide (H2O2) to produce hydroxyl radicals (•OH), which are strong oxidizing agents capable of degrading LSN. The catalyst's core-shell structure, with a carbon layer encapsulating the FeCu metallic core, provides high stability and reduces metal leaching. The presence of low-valence copper in the catalyst promotes the continuous regeneration of Fe(II), which is essential for the Fenton's reaction. This catalyst achieves complete LSN degradation at a low dosage (0.05 g L−1) within 6 minutes at pH 3 and 75 minutes at near-neutral pH, demonstrating its high efficiency and stability.
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