Volume 7 Issue 3
Jun.  2022
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Article Navigation >  Green Energy&Environment  > 2022  >  7(3): 411-422
Changyuan Song, Boyi Zhang, Liang Hao, Jiakang Min, Ning Liu, Ran Niu, Jiang Gong, Tao Tang. Converting poly(ethylene terephthalate) waste into N-doped porous carbon as CO2 adsorbent and solar steam generator. Green Energy&Environment, 2022, 7(3): 411-422. doi: 10.1016/j.gee.2020.10.002
Citation: Changyuan Song, Boyi Zhang, Liang Hao, Jiakang Min, Ning Liu, Ran Niu, Jiang Gong, Tao Tang. Converting poly(ethylene terephthalate) waste into N-doped porous carbon as CO2 adsorbent and solar steam generator. Green Energy&Environment, 2022, 7(3): 411-422. doi: 10.1016/j.gee.2020.10.002
shu

Converting poly(ethylene terephthalate) waste into N-doped porous carbon as CO2 adsorbent and solar steam generator

doi: 10.1016/j.gee.2020.10.002

  • a Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;

  • b Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore;

  • c State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

Funds:

This research is financially supported by the National Natural Science Foundation of China (No. 51903099), Huazhong University of Science and Technology (No. 3004013134), the 100 Talents Program of the Hubei Provincial Government, and the Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. We are also grateful to the Analytical and Testing Centre of HUST, and the Analytical and Testing Centre of the School of Chemistry and Chemical Engineering (HUST) for access to their facilities.

  • Received date 01 August 2020, Accepted date 08 October 2020, RevRecd date 14 September 2020, Publish date 14 October 2020,
    Abstract
  • Sustainable conversion of waste plastics into valuable carbon materials for diverse applications provides a promising strategy to dispose the municipal and industrial waste plastics. However, it remains a challenge to precisely control the crosslinking reaction for transforming waste polyesters into N-doped porous carbon (NPC) with well-defined microstructures. Herein, we put forwards a strategy of stepwise crosslinking using melamine and ZnCl2/NaCl eutectic salts to convert poly (ethylene terephthalate) (PET) into NPC at 550 °C. We prove that firstly melamine reacts with PET degradation products to form a crosslinking structure, and subsequently ZnCl2/NaCl promote the dehydration and decarboxylation of the crosslinking structure to generate a more thermally stable crosslinking structure. The coordination of two tandem crosslinking reactions is critical to control the microstructure of NPC. Without activations, NPC shows large specific surface area of 1173 m2 g−1, abundant N dopants, and rich oxygen-containing groups. These combined features endure NPC with excellent performance in CO2 capture and solar steam generation, e.g., high CO2 adsorption capacity of 6.47 mmol g−1 and evaporation rate of 1.62 kg m−2 h−1. More importantly, NPC is compared to or prevails over previous carbon-based CO2 adsorbents or photothermal materials. This work will advance the research on “green” reutilization of low-cost polyester wastes to prepare sustainable carbon for solar energy conversion, environmental protection, etc.

     

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