摘要
      本研究以新型光催化剂TiO2/MXene构建的动态光催化反应器为基础，系统研究了气溶胶中不同生物颗粒的净化过程。无论是在紫外线条件下还是在光催化条件下，耐多药细菌都比同类普通细菌更容易失活。将光催化剂负载在多孔聚氨酯海绵填料上，使吸附和高级氧化的联合作用显著提高了抗生素耐药菌（ARB）的消毒效果。两种ARB在UV254下的灭活效率分别提高了1.2 lg和2.1 lg。此外，研究发现，紫外线处理的微生物在短时间内有轻微的自我修复现象，而光催化后微生物活性持续下降。随着光催化剂的加入，空气中大肠杆菌的粒径分布减少，细胞的微观形态受到更严重的破坏。ARB携带的抗生素抗性基因（ARGs）可以在细胞破坏后解离到环境中，但同时可以在连续反应器中高水平去除（sul2可以达到2.11lg）。在避免二次污染的同时，它还为机载ARGs控制提供了强大的解决方案。
Abstract
In this study, based on the dynamic photocatalytic reactor constructed by the new photocatalyst TiO2/MXene, the purification process of different biological particles in aerosol was systematically studied. Multidrug resistant bacteria were easier to inactivate than common bacteria of the same kind, whether under UV conditions or photocatalysis. Photocatalyst was loaded on porous polyurethane sponge filler so that the combined effect of adsorption and advanced oxidation significantly improved the antibiotic resistant bacteria (ARB) disinfection effect. The inactivation efficiency of two ARBs under UV254 increased by 1.2 lg and 2.1 lg. In addition, it was found that the microorganisms treated by UV had slight self-repair phenomenon in a short time, while the microbial activity decreased continuously after photocatalysis. With the addition of photocatalyst, the particle size distribution of airborne Escherichia coli decreased and the micro morphology of cells was more seriously damaged. Antibiotic resistance genes (ARGs) carried by ARB can be dissociated into the environment after cell destruction, but it can be removed at a high level (sul2 can achieve 2.11 lg) in the continuous reactor at the same time. While avoiding secondary pollution, it also provides a powerful solution for airborne ARGs control.

https://www.sciencedirect.com/science/article/abs/pii/S0304389422000991