生物气溶胶
室内生物气溶胶
催化作用
化学
臭氧
活性氧
氧气
环境化学
大气(单位)
锰
光化学
气溶胶
有机化学
生物化学
物理
热力学
作者
Haiyu Wang,Linghui Peng,Guiying Li,Hongli Liu,Zhishu Liang,Huijun Zhao,Taicheng An
标识
DOI:10.1016/j.apcatb.2023.123675
摘要
Catalytic ozonation is a promising bioaerosol control technology, as O3 is prevalent in atmosphere. However, O3 at atmosphere concentration has limited oxidation potential and reactive oxygen species (ROS) production, leading incomplete bioaerosol inactivation. Therefore, a catalytic ozonation system with a manganese dioxide/Ni foam (MN) was prepared for efficient bioaerosol inactivation. The MN exhibited superior activity in catalytic ozonation bioaerosol inactivation, achieving 91.6% inactivation efficiency within 8.07 s at atmospheric concentration (0.1 ppm) of O3. The inactivation efficiency can be further improved to 99.0% by regulating surface oxygen vacancies (OV) in MN, which is mainly attributed to abundant OV of MN that facilitate rapid conversion of O3 to other ROSs. Meanwhile, the mechanism of rapid bacterial inactivation was also clarified at cellular level, showing that ROSs caused bacterial oxidative stress. This catalytic ozonation strategy would offer more choices to design efficient O3 catalysts for bioaerosol control and public health protection.
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