Enhanced catalytic ozonation inactivation of bioaerosols by MnO2/Ni foam with abundant oxygen vacancies and O3 at atmospheric concentration

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL Applied Catalysis B: Environmental Pub Date : 2023-12-30 DOI:10.1016/j.apcatb.2023.123675

Haiyu Wang , Linghui Peng , Guiying Li , Hongli Liu , Zhishu Liang , Huijun Zhao , Taicheng An

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Abstract

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 (ROSs) 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 (O_V) in MN, which is mainly attributed to abundant O_V 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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具有丰富氧空位和大气浓度 O3 的 MnO2/Ni 泡沫增强了催化臭氧灭活生物气溶胶的能力

由于大气中普遍存在 O3，催化臭氧是一种很有前景的生物气溶胶控制技术。然而，大气中的 O3 氧化潜能和活性氧（ROS）生成有限，导致生物气溶胶失活不完全。因此，为了高效灭活生物气溶胶，制备了一种带有二氧化锰/镍泡沫（MN）的催化臭氧系统。MN 在催化臭氧灭活生物气溶胶方面表现出卓越的活性，在大气中 O3 浓度（0.1 ppm）为 0.1 ppm 时，MN 在 8.07 秒内的灭活效率达到 91.6%。通过调节 MN 表面的氧空位（OV），灭活效率可进一步提高到 99.0%，这主要归功于 MN 中丰富的 OV 可促进 O3 快速转化为其他 ROS。同时，还在细胞水平上阐明了细菌快速失活的机制，表明 ROS 会导致细菌氧化应激。这种催化臭氧策略为设计高效的 O3 催化剂提供了更多选择，可用于生物气溶胶控制和公共健康保护。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.