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Valorization of waste polyethylene terephthalate plastic into N-doped microporous carbon for CO2 capture through a one-pot synthesis
Abstract
Valorization of waste polyethylene terephthalate (PET) plastic into microporous carbon with N-doping treatment was successfully performed in a one-pot synthesis and the N-doped microporous carbon was used for CO 2 capture, which can mitigate plastic pollution and climate change simultaneously. The PET-derived microporous carbon developed by KOH activation and urea treatment in a one-pot synthesis at 700 °C exhibited the highest CO 2 adsorption uptake of 6.23 mmol g-1 at 0 °C and 4.58 mmol g-1 at 25 °C (1 atm). The Langmuir and pseudo second-order models displayed well-fitting relationships with equilibrium and kinetic experimental data obtained in this study. The N-doped microporous carbon showed high CO 2 selectivity over N 2, implying that it is feasible for treating flue gases (10% CO 2 and 90% N 2) at 50 °C. In addition, the CO 2 uptake was not only affected by micropores but also related with nitrogen and oxygen functional groups. Compared to the porous carbon prepared by two-pot synthesis where KOH activation and urea treatment were conducted separately, the porous carbon prepared by one-pot synthesis had higher oxygen contents and higher CO 2 adsorption uptake. All of findings implied that the N-doped microporous carbon was successfully developed from waste PET plastic for capturing CO 2 and can play a promising role in both sustainable waste management and environmental protection.
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“Material analysis indicated that the synthesized microporous carbon possessed a large specific surface area, facilitating synergistic enhancement of adsorption by surface nitrogen/oxygen functional groups.”
From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [69]
In the citing paper
“Yuan and colleagues employed a one-pot synthesis strategy, simultaneously achieving KOH activation and urea nitrogen doping at 700 °C to convert waste PET plastic into nitrogen-doped microporous carbon, which exhibited good adsorption performance in CO 2 capture applications [69] .”
From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [69]
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Metadata
- Authors
- Yuan, X., Li, S., Jeon, S., Deng, S., Zhao, L., & Lee, K. B.
- Affiliations
- Korea University (KR)
- Tianjin University (CN)
- Corresponding author
- Lee, Ki Bong
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2020-11
- Volume
- 399
- Pages
- 123010
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W3031015867
- Cited by
- 162
- References
- 46
- Citations by year
- 2026: 12 · 2025: 37 · 2024: 29 · 2023: 33 · 2022: 35 · 2021: 13 · 2020: 3
- FWCI
- 10.33
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Research Foundation of Korea (NRF-2020R1A2C2010815)
- Korea-China Joint Research Program (NRF-2018K1A3A1A20025653)
- Korean government’s Ministry of Science and ICT
- Topics
- Physical Sciences › Chemical Engineering › Filtration and Separation › Carbon Dioxide Capture Technologies
- Physical Sciences › Environmental Science › Environmental Engineering › Industrial Gas Emission Control
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Keywords
- PET waste, plastic valorization, CO2 capture, one-pot synthesis, KOH activation, urea treatment, CO2 adsorption, flue gas treatment, nitrogen and oxygen functional groups, plastic pollution, waste plastic recycling
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