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Reinforced nitrogen oxide gas adsorption by sulfur ionic treatment

  • Original Paper - Condensed Matter
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Abstract

To obtain a material that adsorbs nitrogen oxide (NOx) gas with high efficiency, we used sulfuric acid (H2SO4)-treated activated carbon (AC). The proposed H2SO4-treated AC was treated by dipping and spray coating in a H2SO4 solution. For structural analysis, scanning electron microscopy and Brunauer–Emmett–Teller measurements were performed on general and H2SO4-treated ACs. The composition of the atoms on the surface and inner pore structure of both ACs was confirmed through energy dispersive X-ray spectroscopy measurements. From the structural analysis, it was confirmed that the structure of H2SO4-treated AC was similar to that of general AC, indicating that it was not affected by the H2SO4 solution. There was no significant difference in the inner pore structures of general and H2SO4-treated ACs through specific surface area analysis, which indicates that the physical adsorption of NOx gas for the H2SO4-treated AC is similar to that of general AC. Based on the atomic composition analysis, it was confirmed that sulfur ions were largely present on the inner pore structure than the surface of H2SO4-treated AC. These results indicate that the chemical adsorption of sulfur ions and NOx gas in the inner pore structure occurred rather than physical adsorption. The results of this study are expected to be applicable to the field of materials that remove harmful gases.

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Acknowledgements

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20181110200070); Materials, Components & Equipment Research Program funded by Gyeonggi Province.

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Author notes

  1. Young Pyo Jeon and Sang-hwa Lee contributed equally to this work.

Authors and Affiliations

  1. Advanced Institutes of Convergence Technology, Seoul National University, Suwon, Gyeonggi, 16229, South Korea

    Young Pyo Jeon, Sang-hwa Lee, Jun Yong Song, Yong Yeol Park, Eun Jung Lee, Ok Sung Jeon, Sung Ho Kang, Chang Woo Byun, Jinpyung Kim, Sang Yoon Park & Young Joon Yoo

  2. Department of Architectural Engineering, Kyonggi University, Suwon, Gyeonggi, 16227, South Korea

    Keun–Hyeok Yang

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  1. Young Pyo Jeon
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Correspondence to Sang Yoon Park or Young Joon Yoo.

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Jeon, Y.P., Lee, Sh., Song, J.Y. et al. Reinforced nitrogen oxide gas adsorption by sulfur ionic treatment. J. Korean Phys. Soc. 79, 1051–1056 (2021). https://doi.org/10.1007/s40042-021-00317-6

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  • DOI: https://doi.org/10.1007/s40042-021-00317-6

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