通过低协调单个原子促进单个电子转移,以促进废水处理中的先进氧化过程
Yuhang Huang1, Qihao Shen2, Yahong Pu3
1Key Laboratory of Carbon Materials of Zhejiang Province, Key Lab of Biohealth Materials and Chemistry of Wenzhou, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Inorganic chemistry
|October 30, 2024
概括
这项研究提出了在废水处理中用于先进氧化过程 (AOP) 的新型异质催化剂. 通过优化围绕单个原子的协调,催化剂增强了单个电子转移,提高了污染物降解效率.
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:
- 异质催化剂对于废水处理中的先进氧化过程 (AOP) 至关重要,在成本,金属污染减少和运行pH方面具有优势.
- 在AOP中,低的催化效率通常归因于具有挑战性的单电子转移 (SET) 途径.
研究的目的:
- 通过在单原子 (SA) 中心周围调节协调来开发AOPs的高效异质催化剂,以促进SET.
- 调查不同协调 (Co1-N3/4与Co1-N2) 对催化活性和机制的影响.
主要方法:
- 计算指南,以了解电子结构和SET激活.
- 使用氧化物-化合物方法在SA Co周围合成一种具有减少协调 (Co1-N2) 的新型异质催化剂.
- 在各种条件下对有机污染物降解的催化性能的评估.
- 机械研究以确定反应性氧物种.
主要成果:
- Co1-N2催化剂对有机污染物AOP降解的活性显著增强,其动力率和周转频率值分别为0.862分钟-1和389小时-1.
- Co1-N2催化剂的性能优于Co1-N3/4催化剂,并表现出广泛的运行pH范围和对环境干扰的强烈抵抗力.
- 机械学研究证实了氧硫酸盐 (PMS) 和Co1-N2之间通过SET生成单片氧 (1O2),从而提高了AOP效率.
结论:
- 在SA Co中心周围合理调节N协调是提高AOP中的SET和催化效率的有效策略.
- 开发的CO1-N2催化剂显示出对高效和强大的废水处理有很大的希望.
- 这些发现为AOPs的催化剂设计提供了宝贵的见解,突出了电子结构和反应机制的作用.
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