School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
Beijing ENFI Environmental Protection Co., Ltd., Beijing, 100038, China.
Environ Res. 2024 Nov 15;261:119775. doi: 10.1016/j.envres.2024.119775. Epub 2024 Aug 10.
The performance of Electro-Fenton (EF) cathode materials is primarily assessed by HO yield and Fe reduction efficiency. This study explores the impact of pore structure in chitin-based porous carbon on EF cathode effectiveness. We fabricated mesoporous carbon (CPC-700-2) and microporous carbon (ZPC-700-3) using template and activation methods, retaining nitrogen from the precursors. CPC-700-2, with mesopores (3-5 nm), enhanced O diffusion and oxygen reduction, producing up to 778 mg/L of HO in 90 min. ZPC-700-3, with a specific surface area of 1059.83 m/g, facilitated electron transport and ion diffusion, achieving a Fe/Fe conversion rate of 79.9%. EF systems employing CPC-700-2 or ZPC-700-3 as the cathode exhibited superior degradation performance, achieving 99% degradation of Rhodamine B, efficient degradation, and noticeable decolorization. This study provides a reference for the preparation of functionalized carbon cathode materials for efficient HO production and effective Fe reduction in EF systems.
电芬顿（EF）阴极材料的性能主要通过 HO 产量和 Fe 还原效率来评估。本研究探讨了甲壳素基多孔碳的孔结构对 EF 阴极效率的影响。我们使用模板和活化方法制备了中孔碳（CPC-700-2）和微孔碳（ZPC-700-3），保留了前体中的氮。CPC-700-2 具有中孔（3-5nm），促进了 O 的扩散和氧气还原，在 90 分钟内产生了高达 778mg/L 的 HO。ZPC-700-3 的比表面积为 1059.83m/g，有利于电子传输和离子扩散，实现了 79.9%的 Fe/Fe 转化率。采用 CPC-700-2 或 ZPC-700-3 作为阴极的 EF 系统表现出优异的降解性能，对 Rhodamine B 的降解率达到 99%，降解效果显著，且颜色明显褪去。本研究为制备功能化碳阴极材料以在 EF 系统中高效产生 HO 和有效还原 Fe 提供了参考。
