使用新型光催化燃料电池电-Fenton 系统，以 g-C N @N-TiO 和 Ag/CNT@CF 作为电极，对电-Fenton 和光电-Fenton 工艺进行比较研究。
Comparative study of electro-Fenton and photoelectro-Fenton processes using a novel photocatalytic fuel cell electro-Fenton system with g-C N @N-TiO and Ag/CNT@CF as electrodes.
机构信息
Key Laboratory of Environmental Materials and Pollution Control, the Education Department of Jilin Province, College of Engineering, Jilin Normal University, Siping, China.
Ministry of Education, Key Laboratory of Preparation and Applications of Environmentally Friendly Materials (Jilin Normal University), Changchun, China.
出版信息
Water Environ Res. 2024 Jan;96(1):e10946. doi: 10.1002/wer.10946.
In this study, a novel photocatalytic fuel cell electro-Fenton (PFC-EF) system was constructed using g-C N @N-TNA and Ag/CNT@CF as electrodes. The composition, structure, and morphology of the electrodes were obtained. The g-C N @N-TNA, with its 2.37 eV band gap and 100 mV photovoltage, has excellent excitation properties for sunlight. Ag/CNT@CF with abundant pores, CNT 3D nanostructures, and Ag crystals on the surface can improve the electro-Fenton efficiency. A comparative study of rhodamine B (RhB) degradation was performed in this system. It has been shown that electric fields can greatly enhance the oxidation efficiency of both anode photocatalysis and the cathode electro-Fenton process. Under optimal conditions, RhB can be completely removed by the photoelectro-Fenton (PEF) process. The energy consumption of the PEF system was obtained. The electrical energy per order (EE/O) is only 9.2 kWh/m ·order, which is only 16.5% of EF and 2.2% of PFC-EF system. The mineralization current efficiency (MCE) of the PEF system reached 93.3% for a 2-h reaction. Therefore, the PEF system has the advantage of saving energy. The kinetic analysis shows that the RhB removal follows a first-order kinetic law, and the reaction rate constant reaches 0.1304 min , which is approximately 5.2 times larger and 4.0 times larger than the electro-Fenton and PFC-EF processes, respectively. RhB removal is a coupling multimechanism in which an electric field enhances photoelectron migration, Ag loading improves H O generation, UV light coupled with H O promotes hydroxyl radical (٠OH) generation, and the nanoconfinement effect of CNTs promotes ٠OH accumulation in favor of RhB degradation. PRACTITIONER POINTS: Novel efficiency photocatalytic fuel cell electro-Fenton system was constructed. The electric field greatly enhances the photocatalytic fuel cell electro-Fenton system. Multiple coupling mechanisms of UV/H2O2, UV/Fenton and photo-electro-Fenton have been revealed.
在这项研究中，构建了一种新型的光催化燃料电池电芬顿（PFC-EF）系统，该系统使用 g-C N @N-TNA 和 Ag/CNT@CF 作为电极。对电极的组成、结构和形态进行了研究。具有 2.37 eV 带隙和 100 mV 光电压的 g-C N @N-TNA 对太阳光具有优异的激发特性。具有丰富的孔、CNT 3D 纳米结构和表面 Ag 晶体的 Ag/CNT@CF 可以提高电芬顿效率。在该系统中进行了罗丹明 B（RhB）降解的比较研究。结果表明，电场可以极大地增强阳极光催化和阴极电芬顿过程的氧化效率。在最佳条件下，光电化学芬顿（PEF）过程可以完全去除 RhB。获得了 PEF 系统的能耗。每阶电耗（EE/O）仅为 9.2 kWh/m ·阶，仅为 EF 的 16.5%和 PFC-EF 系统的 2.2%。PEF 系统的 2 小时反应的矿化电流效率（MCE）达到 93.3%。因此，PEF 系统具有节能优势。动力学分析表明，RhB 去除遵循一级动力学规律，反应速率常数达到 0.1304 min ，分别约为电芬顿和 PFC-EF 过程的 5.2 倍和 4.0 倍。RhB 去除是一种耦合的多机制过程，其中电场增强光生电子迁移，Ag 负载提高 H O 生成，UV 光与 H O 耦合促进羟基自由基（٠OH）生成，并且 CNT 的纳米限域效应促进 ٠OH 在 RhB 降解中积累。
实践者要点
构建了新颖的高效光催化燃料电池电芬顿系统。
电场极大地增强了光催化燃料电池电芬顿系统。
揭示了 UV/H2O2、UV/Fenton 和光电芬顿的多种耦合机制。
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