Articles | Volume 22, issue 17
https://doi.org/10.5194/acp-22-11347-2022
https://doi.org/10.5194/acp-22-11347-2022
Research article
 | 
05 Sep 2022
Research article |  | 05 Sep 2022

The positive effect of formaldehyde on the photocatalytic renoxification of nitrate on TiO2 particles

Yuhan Liu, Xuejiao Wang, Jing Shang, Weiwei Xu, Mengshuang Sheng, and Chunxiang Ye

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In this study, the influence of HCHO on renoxification on nitrate-doped TiO2 particles is investigated by using an experimental chamber. Mass NOx release is suggested to follow the NO3-NO3·-HNO3-NOx pathway, with HCHO involved in the transformation of NO3· to HNO3 through hydrogen abstraction. Our proposed reaction mechanism by which HCHO promotes photocatalytic renoxification is helpful for deeply understanding the atmospheric photochemical processes and nitrogen cycling.
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