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通过F和Zn修饰的Fe-MCM-41催化臭氧化来增强水净化

Xukai Li¹, Weirui Chen², Dongpo Liu³

¹School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; School of Environment, South China Normal University, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China.

Journal of hazardous materials

|August 25, 2023

概括

这项研究通过引入和Si-F组来提高Fe-MCM-41催化剂的催化臭氧化性能. 修改后的F-Fe-Zn-MCM-41催化剂显著改善了布洛芬的去除和TOC的减少.

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:

在催化臭氧化中,Fe-MCM-41 (FeM) 由于电子迁移低和高水友性,具有较差的活性和稳定性.
催化臭氧化是一种有前途的先进氧化工艺,用于水处理.

研究的目的:

通过提高其电子迁移能力,疏水性和酸性来提高Fe-MCM-41用于催化臭氧化的性能.
为了研究改性催化剂F-Fe-Zn-MCM-41 (FFeZnM) 在去除布洛芬 (IBP) 和总有机碳 (TOC) 的有效性.

主要方法:

合成F-Fe-Zn-MCM-41 (FFeZnM) 通过将二次金属Zn和Si-F组引入Fe-MCM-41.
使用各种技术来分析其属性的FFeZnM的特征.
评估了FFeZnM/O3在不同水矩阵中的IBP和TOC去除的催化性能.

主要成果:

由于Si-F单元,FFeZnM表现出丰富的酸位,增强的疏水性和改善的电子迁移能力.
Si-F组促进了O3的质量转移,O3在Fe和Zn的易斯酸位点上被激活,产生反应性氧物种 (ROS).
FFeZnM/O3实现了93.4%的IBP去除和46.6%的TOC去除,显著超过了O3和F-FeM/O3.3.

结论:

引入Zn和Si-F组有效地增强了Fe-MCM-41催化剂的催化臭氧化.
FFeZnM是一种高效的催化剂,用于降解IBP和降低水中的TOC.
这项工作提出了一种创新的策略,用于设计用于先进氧化过程的催化剂.

关键词:

在FFeZnM/O ((3)) 中.疏水中心是疏水的中心.降低IBP的降解 IBP的降解表面电位差异的差异

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