在Holey MXene上限制非对称协调的单原子/集群,用于超快的芬顿式催化
Xin Guo1, Hao Zhang1, Yunlong Wang1
1Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
Angewandte Chemie (International ed. in English)
|June 24, 2025
概括
这项研究引入了一种具有不对称位的新型催化剂,用于增强氧硫酸盐激活,通过电子转移和聚合有效地去除双A. 催化剂在水处理应用中显示出高效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 具有不对称协调的单原子催化剂 (SAC) 对于改善氧硫酸盐 (PMS) 在芬顿类反应中的激活至关重要.
- 调节金属中心电子结构和协调是增强催化动力学的关键,但仍然具有挑战性.
研究的目的:
- 设计和合成一种具有不对称单原子位点和纳米集群的新型催化剂,纳米集群被限制在MXene纳米板上的石墨化碳层中.
- 调查催化剂在激活PMS中对去除双A (BPA) 的性能,并阐明底层的去除机制.
主要方法:
- 不对称的CoN1O2单个原子 (SAs) 和Co纳米集群 (NCs) 的合成,这些纳米集群被限制在MXene (CoSA-NC/H20MX) 洞上的石墨化碳中.
- 对BPA降解和总有机碳 (TOC) 去除的催化性能的评估.
- 机械学研究包括电子转移过程 (ETP) 分析和密度函数理论 (DFT) 计算.
- 用于连续处理水的催化膜的制造.
主要成果:
- CoSA-NC/H20MX催化剂在去除BPA和78.2%的TOC方面实现了2750分钟-1M-1的高校正速率常数 (k值).
- 在BPA的去除过程中,主要采用非激进电子转移过程 (ETP,~100%),从而导致BPA的聚合.
- DFT计算证实了Co NCs和不对称的CoN1O2SAs对PMS激活的协同增强,加速了电荷转移.
- 一种催化膜在24小时内在40毫秒的液压保留时间内在单通模式下实现了100%的BPA除去.
结论:
- 开发的具有双协调微环境策略的催化剂有效地激活了PMS,通过ETP驱动的聚合,有效地去除BPA.
- 催化剂在实际水处理应用中表现出卓越的性能和稳定性.
- 这项工作提供了关于通过非激进途径设计先进的催化剂,用于通过非激进途径降解污染物.
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