在CeO2中通过双过渡金属兴奋剂调节4f-2p-3d轨道合,以有效地激活过氧单硫酸盐
Shihao Miao1,2, Haoran Niu1,2, Yang Wu1,2
1Key Laboratory of Coastal Water Environmental Management and Water Ecological Restoration of Guangdong Higher Education Institutes, Zhuhai Key Laboratory of Coastal Environmental Processes and Ecological Restoration, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 27, 2026
概括
工程化铁/配合的氧化催化剂促进过氧化硫酸盐 (PMS) 激活,用于净化水. 这种双金属兴奋剂优化了电子结构,提高了污染物降解效率,并解决了基于PMS的先进氧化过程 (PMS-AOPs) 中的动力限制.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 基于氧硫酸盐的先进氧化过程 (PMS-AOPs) 被氧化 (CeO2) 催化剂的动力限制所阻碍.
- 缓慢的界面电子转移和低效的含氧中间体吸附阻碍了催化剂的性能.
研究的目的:
- 设计一种新型的双过渡金属 (Fe/Co) 合 CeO2 催化剂,以克服 PMS-AOPs 的动力限制.
- 通过梯度4f-2p-3d轨道合优化CeO2的电子结构,以增强催化活性.
主要方法:
- 使用自模拟合成来创建Fe/Co-doped CeO催化剂.
- 使用全面的表征技术来分析催化剂结构和电子特性.
- 进行密度函数理论 (DFT) 计算,以调查反应机制和能量障碍.
主要成果:
- 铁/联合兴奋剂诱导了晶格扭曲,增加了Ce (IV) 含量,并缩小了能量差距,增强了界面电子转移.
- 优化的FeCo3-CeO2催化剂实现了Norfloxacin降解速率常数,比Fe-CeO2高25倍,比Co-CeO2高7倍.
- 机械研究揭示了双根/非根路径,Ce位点产生O2和Fe/Co位点启动SO4形成.
结论:
- Fe/Co-doped CeO2催化剂通过优化轨道合和中间溶解,有效地解决了PMS-AOP中的动力瓶.
- 催化剂具有广泛的适用性,在各种水矩阵中具有稳定性,并在连续流动操作中保持高污染物去除效率.
- 这项研究为设计通过精确的轨道合调节净化水的高性能4f材料催化剂提供了基础.
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