NO2 adsorption at ambient temperature on urea-modified ordered mesoporous carbon |
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| Affiliation: | 1. University of Science and Technology (UST), Daejeon, South Korea;2. Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, South Korea;3. Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria 694, Irrigación, Miguel Hidalgo, CDMX, Mexico;4. Universidad de La Habana, Facultad de Química, Laboratorio de Bioninorgánica, La Habana, Cuba;5. K. J. Somaiya College of Science and Commerce, University of Mumbai, Mumbai, India;6. Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India;7. HomiBhabha National Institute, Mumbai, India;1. College of Chemistry and Material Sciences, South Central University for Nationalities, 182 Minyuan Road, Wuhan 430074, PR China;2. College of Pharmacy, South Central University for Nationalities, 182 Minyuan Road, Wuhan 430074, PR China;1. University of Science and Technology (UST), Daejeon, South Korea;2. Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, South Korea |
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| Abstract: | A soft-templated ordered mesoporous carbon was synthesized, impregnated with urea and pyrolyzed at 500 and 800 °C. The samples obtained were tested as NO2 adsorbents. Their structural properties and surface chemistry, before and after NO2 exposure, were investigated using nitrogen adsorption, TEM, potentiometric titration and thermal analysis. Results showed that the ordered mesoporous structure remains stable throughout the treatment applied and exposure to NO2. Even though the initial carbon exhibited a high NO2 adsorption capacity, the incorporation of nitrogen groups to the carbon surface, resulted in the further improvement of the performance after heat treatment. The mechanism of reactive adsorption was found to be significantly affected by surface chemistry of mesoporous carbons. |
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