Photodegradation of Nitrogen Oxide under Solar Light Using a Facile Synthesis Catalyst

NO_x is becoming a hot issue due to its contribution to ozone, PM_(2.5) formation, and its negative impacts on the ecosystem. In this study, the synthesis of an MgO/Bi_2S_3-BiOCl composite was carried out via the co-precipitation method for the photodegradation of nitrogen oxide (NO) under solar lig...

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Bibliographic Details
Published in:Aerosol and Air Quality Research 2021-10, Vol.21 (10), p.1-14
Main Authors: Fenelon, Ernso, You, Sheng-Jie, Wang, Ya-Fen
Format: Article
Language:English
Subjects:
Bismuth sulfides
Catalysts
Chemical precipitation
Chemical synthesis
Coprecipitation
Environmental impact
Fourier transforms
Heterojunctions
Light
Magnesium chloride
Magnesium oxide
Nitrogen
Nitrogen oxides
Particulate matter
Photocatalysis
Photochemicals
Photodegradation
Pollutants
Potassium
Precipitation
Precursors
Spectrum analysis
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Summary:NO_x is becoming a hot issue due to its contribution to ozone, PM_(2.5) formation, and its negative impacts on the ecosystem. In this study, the synthesis of an MgO/Bi_2S_3-BiOCl composite was carried out via the co-precipitation method for the photodegradation of nitrogen oxide (NO) under solar light. The BiOCl heterojunction is a result of interactions between the Bi_2S_3 solution and the MgCl_2.6H_2O precursor. This BiOCl heterojunction provides more available active species that enhance the degradation of NO. The successful synthesis of this composite using a co-precipitation method was confirmed by different characterization analyses (XRD, FTIR, SEM, TEM, DRS, and ESR). The photocatalytic degradation of NO under solar light using 7% MgO/Bi_2S_3-BiOCl reached an efficiency of 74.6%, which was better than that obtained using pure Bi_2S_3 (42.8%) and MgO (11.2%). The reusability test showed that the 7% MgO/Bi_2S_3-BiOCl material was maintained stability in the photodegradation of NO even after five cycles. The trapping test showed that the holes (h^+) and hydroxyl (^．OH^-) were the main active factors in the photodegradation process. The findings of this study confirmed that MgCl_2.6H_2O is a suitable precursor leading to improvements in the performance of Bi_2S_3 for the purpose of promoting a new composite that can be used in the photodegradation of NO and could be a candidate for practical applications.
ISSN:1680-8584
2071-1409
DOI:10.4209/aaqr.210128