范德华异质结催化剂的构筑及其活化过硫酸盐降解典型抗生素污染物的研究

通过对催化材料在微纳尺度下的精细设计，实现界面电荷的有效传递，加快活性金属离子的循环速率，提高稳定性，是当前活化过硫酸盐氧化技术的前沿研究方向。本项目针对水环境中抗生素污染问题突出的现状，选取对PMS具有良好活化性能的金属氧化物MOx（M=Co、Mn，即钴系氧化物CoOx和锰系氧化物MnOx）和具有“电子穿梭体”特性的POM，构建基于范德华异质结催化剂MOx/POM活化过一硫酸盐（PMS）的高级氧化体系，以期实现水污染的高效控制。通过范德华异质结的构筑来提高界面电荷传输速率，加快限速步M(n+1)+向M(n)+的循环，进而实现PMS的高效活化，并评估其对抗生素污染物的降解性能及关键影响因子。探究催化剂表界面性质对催化活化性能的影响，阐明固液界面电子迁移以及污染物催化转化机制，建立高效活化PMS降解去除水环境中典型抗生素污染物的体系，为控制水环境污染和保障人类健康提供技术支撑。

The rational design and fine-tuning the micro/nano structure of the catalytic materials for activated persulfate oxidation systems could not only promote the charge transfer between the catalyst and the persulfate, but also accelerate the circulation rate of active metal ions. Regrading the severe antibiotic contamination in aqueous media, we proposed to develop a van der Waals heterojunction catalyst, namely MOx/POM, for the peroxymonosulfate (PMS) based advanced oxidation system to achieve high efficient remediation. The novel van der Waals heterojunction catalyst (MOx/POM) would be constructed based on the Mn/Co-based metal oxide which has good capability for the activation of PMS and the polyoxometalates (POMs) which is known as “electron shuttle”. The construction of the van der Waals heterojunction would enhance the interfacial charge transfer as well as accelerate the cycle of the rate-limiting step M(n+1)+ to M(n)+, leading to the efficient activation of persulfate. We would evaluate the antibiotics degradation performance of the PMS based advanced oxidation system. The project would further investigate the influence of catalyst interfacial properties onto catalytic activation performance, and elucidate the underlying mechanism of charge migration in the solid-liquid interface as well as the catalytic degradation pathway and mechanism of antibiotics. This study would provide a novel approach for the PMS efficient activation and the decontamination of antibiotics.