Polyacrylonitrile-Derived N-Doped Nanoporous Carbon Fibers for CO2Adsorption
ACS Applied Nano Materials, cilt.5, sa.9, ss.13473-13481, 2022 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 5 Sayı: 9
- Basım Tarihi: 2022
- Doi Numarası: 10.1021/acsanm.2c03126
- Dergi Adı: ACS Applied Nano Materials
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
- Sayfa Sayıları: ss.13473-13481
- Anahtar Kelimeler: CO2adsorption, fiber morphology, N-doping, nanoporous carbon fibers, one-pot KOH activation
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
Carbon dioxide (CO2) capture and storage is a fundamental global environmental issue that has driven researchers to develop ingenious strategies to overcome this issue. Herein, N-enriched nanoporous carbon fibers were prepared from commercially available polyacrylonitrile fiber through a one-pot simultaneous carbonization/activation strategy. The effect of the amount of the activating agent and carbonization temperature on the nanoporous/surface chemical properties of carbons and the consequent CO2adsorption performance was fully investigated. This direct activating strategy protected the fiber morphology of the resulting nanoporous carbons, while also resulting in a well-developed porous structure. The as-prepared nanoporous carbon fiber shows the maximum Brunauer-Emmett-Teller surface area and total pore volume of 2330 m2g-1and 1.25 cm3g-1, respectively, together with a nitrogen content of up to 14.36 wt %. The optimal nanoporous carbon fiber exhibited CO2uptakes of 6.16 and 4.03 mmol g-1at 1 bar and 0 and 25 °C, respectively, with an acceptable CO2/N2selectivity of 23. Besides, the optimal sample depicts a dynamic CO2capture capacity of 0.84 mmol g-1and only a 3% CO2uptake capacity loss after five adsorption-desorption cycles. Overall, the combined effect of narrow microporosity and nitrogen functionalities determined the CO2uptake of this series of N-doped nanoporous carbon fibers.