Novel catalytic ceramic membranes anchored with MnMe oxide and their catalytic ozonation performance towards atrazine degradation
作者:Yuan He、Liangjie Wang、Zhan Chen、Xia Huang、Xiaomao Wang、Xiaoyuan Zhang、Xianghua Wen
DOI:10.1016/j.memsci.2022.120362
日期:2022.4
In the present study, MnMe oxide (Me = Fe, Co, Ce) were in situ embedded on the surface and inside micropores of membranes by redox reaction to fabricate novel catalytic ceramic membranes. The synergistic effect of membrane filtration and catalytic ozonation were evaluated towards atrazine degradation. MnCe-CM owned the best performance with 99.99% atrazine removal in 40 min among four catalytic membranes
在本研究中,MnMe氧化物(Me = Fe,Co,Ce)通过氧化还原反应原位嵌入膜的表面和微孔内部,以制备新型催化陶瓷膜。评估了膜过滤和催化臭氧化对阿特拉津降解的协同作用。由于 Ce 3+ /Ce 4+和 Mn 2+ /Mn 3+产生的氧空位,MnCe-CM 在四种催化膜中具有最佳性能,在 40 分钟内去除了 99.99% 的阿特拉津. 随后选择 MnCe-CM 来探索优化的操作条件,发现臭氧浓度为 0.8 mg/min 和 pH 7。由于催化剂成功嵌入 MnCe-CM 的表面和微孔内部,催化臭氧化需要放置在表面和内部的微孔中。考虑到高比表面提供了足够的反应位点,而有限的空间促进了•OH 与反应物之间的接触,微孔表面和内部的反应被证明是非常有效的。此外,基于确定的副产物提出了阿特拉津降解途径。分别通过密度函数理论(DFT)和毒性估计软件工具(TEST)计算反应位点和生物毒性评价。