用Mn anchored zeolite分子巢用于增强CEPHALEXIN的催化臭氧化
Yaxiong Zeng1, Qizheng Zhuo2, Liyan Dai1
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 320013, China.
Chemosphere
|May 31, 2023
概括
一种新型的-的化分子巢 (Mn@ZN) 催化剂有效地通过催化臭氧化从水中去除抗生素塞法列辛 (CLX). 与传统方法相比,这种先进的氧化过程显示出出色的稳定性和显著提高的降解率.
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:
- 传统的支持催化剂的效果不如分子巢结构催化剂.
- 先进的氧化过程 (AOP) 对于从水中去除耐火有机污染物至关重要.
- 在AOP中用于抗生素去除的分子巢催化剂的应用仍然未得到充分探索.
研究的目的:
- 为了合成和评估一个为的酸分子巢 (Mn@ZN) 催化剂,用于催化性臭氧化CEPHALEXIN (CLX).
- 研究Mn@ZN在降解CLX中的效率,动力学和稳定性.
- 阐明Mn@ZN在臭氧化过程中的催化机制.
主要方法:
- 合成Mn anchored热分子巢 (Mn@ZN) 的催化剂.
- 对于塞法列辛 (CLX) 降解的催化臭氧化实验.
- 在多个周期内进行动力分析和稳定性测试.
- 密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- 在2分钟内,Mn@ZN实现了97%的CLX降解,速度常数是非催化臭氧化的79.2倍.
- 催化剂表现出极好的稳定性,在十个循环后保持超过88%的降解效率.
- 分子巢中的Mn离子会产生易斯酸位和氧气空缺,促进臭氧分解成活性氧物种 (ROS).
- DFT的计算证实了引入后氧气空隙形成和臭氧吸附能量的减少.
结论:
- Mn@ZN是一种高效和稳定的催化剂,用于在水中催化对塞法列辛的臭氧化.
- 分子巢结构和Mn结合通过促进ROS生成来增强催化活性.
- 这项研究提出了一个有前途的催化剂设计策略,用于在水处理应用中使用化物限制的金属催化剂.
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