室内生物气溶胶
光催化
细菌
臭氧
化学
污染物
催化作用
环境化学
有机化学
生物化学
生物
遗传学
作者
Ang Li,Linghui Peng,Guiying Li,Weiping Zhang,Zhishu Liang,Huijun Zhao,Taicheng An
标识
DOI:10.1016/j.apcatb.2022.122273
摘要
Inactivation of bioaerosols is critical to prevent the spread of microbial pathogens in air. Photocatalytic inactivation processes are environmental friendliness, while time-consuming and insufficient reactive oxygen species (ROSs) generation to irreversibly inactivate bacteria in bioaerosols. In this work, a novel photocatalytic ozonation (PCO) system was constructed, consisting of in situ grown NiFeOOH nanosheets on nickel foam (NiFeOOH NSs/NF) and trace concentration of ozone (O3). Specifically, the PCO system exhibited remarkable photocatalytic inactivation efficiency (99.99%) within an ultrashort retention time of 8.07 s (RH = 90%) while no bacteria survived after 24-h cultivation. The irreversible inactivation of bacteria in this PCO system attributes to the synergistic effect of physical destruction by NiFeOOH NSs/NF and oxidative damage by photogenerated ROSs. This research provides a better alternative for efficient inactivation of bioaerosols and opens the door for the application of PCO system in reducing the exposure risk of bioaerosols.
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