基于生物炭的单原子催化剂具有Fe-N3O-C配置,可通过过氧化硫酸盐激活有效降解有机染料
Xueyan Xue1,2, Nan Xue1,2, Dandan Ouyang1
1Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, and Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.
ACS applied materials & interfaces
|November 30, 2023
概括
棉花茎衍生的铁单原子催化剂有效地激活过氧硫酸盐 (PMS) 以快速降解染料. 该Fe-N3O-C配置产生单点氧气,在废水处理中证明有效.
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:
- 铁单原子催化剂 (Fe SAC) 对过氧硫酸盐 (PMS) 激活有望降解有机污染物.
- 了解基于生物炭的Fe SACs对PMS激活的催化场所和机制至关重要,但具有挑战性.
研究的目的:
- 准备和研究由棉花茎衍生的基于生物炭的Fe SACs (Fe SACs-BC),具有不对称的Fe-N/O-C配置.
- 阐明合成Fe SACs-BC的PMS激活和酸7 (AO7) 降解机制.
主要方法:
- 用于制备具有特定Fe-N3O-C配置的Fe SACs-BC.
- 使用AO7和其他有机染料进行降解实验.
- 包括EPR,XPS,电化学分析和理论计算在内的表征技术.
- 灭和掩盖实验以识别反应性氧物种.
主要成果:
- 具有Fe-N3O-C配置的Fe SACs-BC在15分钟内实现了95-99%的AO7和其他五种染料的去除.
- 单片氧被确定为染料降解的主要反应物种.
- 降解发生在电子缺乏碳和铁部位的直接PMS转化.
- 催化剂在各种水矩阵和条件下表现出高效率和耐受性.
结论:
- 基于生物炭的Fe SAC中的Fe-N3O-C配置对PMS激活和染料降解是有效的.
- 通过直接PMS转化单点氧生成是主要降解途径.
- 由于其强度,Fe SACs-BC在处理实际织废水方面具有显著的潜力.
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