洞察通过Mo单原子催化剂激活过氧酸盐的机制:单氧氧的演变和Mo-N协调的作用
Yajie Guo1, Chenyang Ma1, Zhiyuan Gao1
1School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai 200093, PR China.
Journal of environmental management
|April 10, 2024
概括
一种新型的单原子催化剂 (Mo-NC-0.1) 使用过氧硫酸盐 (PMS) 有效地降解双A (BPA). 这种先进的氧化过程主要产生单片氧,为污染物清除提供了稳定有效的方法.
科学领域:
- 环境化学环境化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 氧硫酸盐 (PMS) 激活是有机污染物降解的关键先进氧化过程 (AOP).
- 单原子催化剂在化学反应中提供高效率和选择性.
- 双A (BPA) 是一种持久性有机污染物,需要有效的去除策略.
研究的目的:
- 在添加碳 (Mo-NC-0.1) 上合成和表征单原子催化剂.
- 调查Mo-NC-0.1对基于PMS的BPA降解的催化活性.
- 阐明反应机制并确定主要的活性氧物种.
主要方法:
- 在添加碳上合成单原子催化剂 (Mo-NC-0.1).
- 使用Mo-NC-0.1/PMS系统对双A (BPA) 的降解实验.
- 测量测试和密度函数理论 (DFT) 计算,以确定反应机制和反应性氧物种.
主要成果:
- 在20分钟内,Mo-NC-0.1完全降解了BPA.
- 单点氧 (1O2) 被确定为主要的反应性氧物种,由Mo-N4位点产生.
- 催化剂表现出高稳定性,最小的浸出,并降低了BPA的毒性.
结论:
- 莫-NC-0.1 / PMS系统是通过单一氧气生成BPA降解的高效催化剂.
- 独特的Mo-N协调和pyridinic N位点有助于增强催化活性和基质固定.
- 这项研究为应用单原子催化剂在基于PMS的AOP中用于环境修复提供了有价值的见解.
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