Hongjian Zhu, Shumei Song, Rui Wang This email address is being protected from spambots. You need JavaScript enabled to view it.

School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China


Download Citation: ||https://doi.org/10.4209/aaqr.2020.03.0110 

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Cite this article:

Zhu, H., Song, S. and Wang, R. (2020) Removal of NOx by adsorption/decomposition on H3PW12O40·6H2O supported on ceria. Aerosol Air Qual. Res., https://doi.org/10.4209/aaqr.2020.03.0110


  • HPW/CeO2 was prepared and used as novel NOx adsorption/decomposition catalyst.
  • The optimal conditions for NOx adsorption by HPW/CeO2 were obtained.
  • The optimized HPW/CeO2 has higher NOx uptake (85.6 mg g-1) than HPW (50.5 mg g-1).
  • The adsorbed NOx can be decomposed to N2 via temperature ramping.


A series of HPW/CeO2 composite materials were synthesized and used for adsorption and decomposition of NOx. The synthesized HPW/CeO2 were characterized by XRD, FTIR and BET. The denitrification performance of HPW/CeO2 was determined by the dynamic NOx adsorption study along with various relevant factors. The results of IR characterization show that the adsorbed NOx enters the bulk phase of HPW and replaces the crystal water to combine with its protons to form NOH+. The optimal saturated NOx adsorption amounts of HPW/CeO2 systems (85.6 mg NO2 g-1) is much higher than that of HPW (50.5 mg NO2 g-1). The GC-MS detection showed that the adsorbed NOx can be reduced to N2 by the temperature programming process.

Keywords: Polyoxometalate; NOx; Adsorption and decomposition; H3PW12O406·H2O/CeO2.

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