红外光驱动的光热耦合催化在空气杀菌中的协同效应及其消毒机制研究

空气中病原微生物对人体健康的不良影响受到广泛的关注，发展低能耗、高效率、环境友好、适用范围广的空气杀菌技术对保障人体健康有重要意义。红外光响应的光热催化技术由于耦合光和热两种催化作用，协同生成活性自由基，并将光转化为热，杀灭微生物，从而成为具有发展潜力的空气杀菌技术。如何提高催化剂的光热转换效率、光热催化性能、自由基协同产生以及与微生物的亲和性是实现空气杀菌技术的关键科学问题。本项目主要研究基于三维大孔聚吡咯 (3DMPPy) 和单原子金属修饰的氧空位MnO2 (Vo-MnO2@AM) 制备红外光响应的3DMPPy@Vo-MnO2@AM光热耦合催化剂为主要特征的杀菌新方法和应用。通过调控光热催化剂界面结构，实现长期高效稳定的杀菌性能；在分子尺度上研究细菌分子对光热催化的应激和反馈机制，探究光热耦合催化体系在红外光驱动下的杀菌机理。该研究为实现光热催化杀菌的应用提供重要的科学依据和理论支撑。

Pathogenic microorganisms in the air have adverse effects on human health, which has attracted more and more attention. It is of great significance to develop air sterilization technology with low energy consumption, high efficiency, environmental friendliness and wide range of application to protect human health. As a result of the coupling of photocatalysis and thermocatalysis, the photothermocatalytic technology can synergistically generate active radicals, convert light into heat and kill microorganisms under infrared light, thus, becoming one of the potential air sterilization technologies. At present, the key scientific issues of sterilization technology in air is how to further improve the photothermocatalytic activity, the production of active radicals, and the affinity of photothermocatalyst with microorganisms. In this study, a novel sterilization method and application based on the photothermal coupling catalytic system of 3DMPPy@Vo-MnO2@AM is studied, in which single atomic metal modified oxygen vacancy-containing MnO2 (Vo-MnO2@AM) is decorated on conductive three-dimensionally macroporous polypyrrole (3DMPPy). By adjusting the interface structure of the photothermal catalyst, the long-term high-efficiency and stable bactericidal performance using 3DMPPy can be achieved, and relationship between the catalyst structure and the photothermocatalytic synergistic bactericidal performance can be established. The photothermocatalytic sterilization mechanism of the photothermal coupling catalytic system driven by infrared light is deeply explored, as well as the stress and feedback mechanism of bacterial molecules on the molecular scale during photothermocatalytic process. Herein, this study will provide an important scientific basis and theoretical support for the application of photothermocatalytic sterilization in air.