高度隔离的中间层Co-N4固定在heptazine上,促进过氧硫酸盐的激活,以选择性地产生单片氧
1Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China.
Journal of hazardous materials
|December 9, 2025
概括
高分散的--4 (Co-N4) 单原子催化剂有效地激活过氧硫酸盐 (PMS),产生单片氧 (1O2),以快速降解污染物. 这一突破提供了高效的废水处理解决方案.
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:
- 激活过氧硫酸盐 (PMS) 以选择性地产生单点氧 (1O2) 用于使用Co-N4催化剂降解持久污染物仍然是一个重大挑战.
- 废水中的固有机污染物对环境和健康构成风险,需要先进的氧化过程.
研究的目的:
- 设计一种新的Co-N4催化剂 (Co-BCCN),具有增强的PMS激活能力,用于选择性单片氧生成.
- 研究Co-BCCN在降解硫甲醇 (SMX) 等有机污染物的催化机制和效率.
主要方法:
- 超分子自我组装策略合成高度分散的Coi离子,和蓝组共修改碳化物 (Co-BCCN).
- 氧硫酸盐 (PMS) 激活实验用于硫甲醇 (SMX) 的降解.
- 密度函数理论 (DFT) 计算以阐明反应机制.
- 生态毒性和植物毒性分析用于实际应用评估.
主要成果:
- 设计的Co-BCCN催化剂表现出独特的介层Co-N4结构,促进受限PMS激活和活性氧物种 (ROS) 生成.
- 同BCCN在2分钟内显示出几乎100%的SMX去除,高速率常数为2.3342分钟-1,主要通过单一氧 (1O2).
- DFT的计算证实了SO5•−作为选择性1O2生成的关键中间体,生态毒性测试证实了废水后处理的安全性.
结论:
- Co-BCCN 单原子催化剂有效地激活 PMS,用于非激素主导的有机污染物的降解,其中单片氧是主要的 ROS.
- 这项工作为设计先进的单原子催化剂提供了宝贵的见解,用于废水处理中高效和选择性的污染物降解.
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