Minh-Thuan Pham1,2,3, Truc Mai Thi Nguyen4, Sheng-Jie You2,3, Ya-Fen Wang This email address is being protected from spambots. You need JavaScript enabled to view it.2,3 

1 Department of Civil Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
2 Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
3 Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan 32023, Taiwan
4 Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung 83347, Taiwan


Received: October 21, 2022
Revised: February 11, 2023
Accepted: February 13, 2023

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.4209/aaqr.220355  

Cite this article:

Pham, M.T., Nguyen, T.M.T., You, S.J., Wang, Y.F. (2023). Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes. Aerosol Air Qual. Res. 23, 220355. https://doi.org/10.4209/aaqr.220355


  • The photocatalytic NO removal efficiency was 75% under solar light.
  • Low toxical by-product generation during the photocatalytic reactions.
  • The photocatalytic mechanism and reusability have been discussed.
  • Hydroxyl radical (•OH) plays a crucial role in photocatalytic activity.


Air pollution is one of the most concerning issues today because of its adverse effects on living organisms and the environment. Therein, nitric oxide (NO) is the leading cause of the greenhouse effect, acid rain, and respiratory diseases. Therefore, discovering a low-cost, environmentally friendly, highly efficient photocatalysis technique to remove NO is necessary and urgent. In this work, the ZnSn(OH)6 microcubes (cZHS) catalyst was decorated with golden nanoparticles (Au:cZHS) to enhance the photoredox-catalyzed degradation of NO under solar light by surface plasmon resonance (SPR). This work demonstrated the contribution of SPR to the photoredox performance of the ZHS. Herein, the photoredox efficiency of the cZHS increased dramatically under the effecting of SPR from the golden nanoparticles, the photoredox efficiency of the Au:cZHS reached 75%, about four times higher than that of cZHS. In addition, the generation of other nitrogen species, nitrogen dioxide (NO2) conversion, and the reusability of the materials are calculated and discussed carefully by theory and experiment. On the other hand, the contribution and lifespan of radicals are also investigated clearly with trapping experiments and time-dependent electron spin resonance (ESR). This study provided the reader with a clear understanding of the SPR effect on the photocatalytic performance of cZHS, which may be necessary for future related studies.

Keywords: Photocatalysis, Nitric oxide, ZnSn(OH)6, Au nanoparticles, Surface Plasmon Resonance

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