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首页> 外文期刊>Environmental Science & Technology: ES&T >Highly Enhanced Photocatalytic NO Removal and Inhibited Peroxyacetyl Nitrate Formation in Synergistic Acetaldehyde Degradation
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Highly Enhanced Photocatalytic NO Removal and Inhibited Peroxyacetyl Nitrate Formation in Synergistic Acetaldehyde Degradation

机译:Highly Enhanced Photocatalytic NO Removal and Inhibited Peroxyacetyl Nitrate Formation in Synergistic Acetaldehyde Degradation

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摘要

The coexistence of NO and CH3CHO in the air is considered to produce secondary peroxyacetyl nitrate (PAN) under sunlight irradiation, threatening the ecological environment and public health. Herein, we provide a simple strategy for the photocatalytic removal of NO and acetaldehyde (CH3CHO) on Sr2Sb207. In comparison with the single removal, the nearly complete removal of NO is reached by deep oxidation to N03" with the assistance of CH3CHO. The underlying mechanism is revealed by GC—MS, in situ DRIFTS, and density functional theory calculations. The intermediates *CH3 from CH3CHO and N02~ from NO tend to bond and further oxidize to CH3ON02, thus promoting NO removal. CH3N02 and CH30N02 are the key products instead of PAN on Sr2Sb2Oy from the synergistic degradation of NO and CH3CHO. This work brings new insights into reaction pathway regulation for promoting performance and suppressing byproducts during synergistic air pollutant removal.

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