切换由Mn-Pt anchored zeolite衍生的活性氧物种反应,用于选择性催化臭氧化
Yaxiong Zeng1, Qizheng Zhuo2, Jian Pan2
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
Environmental pollution (Barking, Essex : 1987)
|March 9, 2024
概括
研究人员开发了双金属Mn-Pt热酸盐催化剂,以在先进的氧化过程中切换活性氧物种 (ROS) 反应. 这使得水污染物的有效,可持续的降解,通过控制单点氧或激素路径.
科学领域:
- 环境化学环境化学
- 催化剂是一种催化剂.
- 先进的氧化过程 (AOPs)
背景情况:
- 先进的氧化过程 (AOP) 需要合理控制活性氧物种 (ROS),以有效降解污染物.
- 目前的AOP面临着工程应用的适应性和效率方面的挑战,需要新的催化策略.
- 切换ROS反应对于优化催化臭氧化过程至关重要.
研究的目的:
- 在催化臭氧化中合成双金属Mn-Pt热酸催化剂,用于切换ROS反应.
- 通过控制ROS通道,实现水中的有机污染物的可持续降解.
- 提高AOPs对环境修复的效率和适应性.
主要方法:
- 在焦岩基架上固定的双金属Mn-Pt催化剂的合成 (MnPt/H-Beta和MnPt@Si-Beta).
- 通过改变催化剂结构和组成来研究ROS反应途径 (单氧与激素主导).
- 在降解中的催化性能评估和稳定性和抗干扰性评估.
主要成果:
- 通过修改热结构和Pt/Mn比率,ROS反应从单氧 (71.01%) 转换为由激素主导的 (93.79%) 途径.
- 在MnPt@Si-Beta中空缺的氧气加速了通过电子转移将臭氧分解为基基 (•OH).
- MnPt@Si-Beta/O3在降解中实现了34.7倍的增加,具有出色的稳定性;MnPt/H-Beta/O3显示出对常见离子的优越抗干扰.
结论:
- 双金属Mn-Pt热酸盐催化剂为转换臭氧化过程中的ROS反应提供了一种新的策略.
- 催化剂的设计,特别是定点和金属比率,控制了针对污染物降解的ROS途径.
- 这种方法扩大了基于O3的AOP的应用范围,以实现有效的环境修复.
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