Lignin-derived heteroatom-doped porous carbons for supercapacitor and CO2 capture applications
International Journal of Energy Research, cilt.42, sa.8, ss.2686-2700, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 42 Sayı: 8
- Basım Tarihi: 2018
- Doi Numarası: 10.1002/er.4058
- Dergi Adı: International Journal of Energy Research
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.2686-2700
- Anahtar Kelimeler: biomass, chemical activation, CO2 separation, heteroatom-doped carbon, hydrothermal carbonization, lignin, supercapacitor
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
The present study reports the economic and sustainable syntheses of functional porous carbons for supercapacitor and CO2 capture applications. Lignin, a byproduct of pulp and paper industry, was successfully converted into a series of heteroatom-doped porous carbons (LHPCs) through a hydrothermal carbonization followed by a chemical activating treatment. The prepared carbons include in the range of 2.5 to 5.6 wt% nitrogen and 54 wt% oxygen in its structure. All the prepared carbons exhibit micro- and mesoporous structures with a high surface area in the range of 1788 to 2957 m2 g−1. As-prepared LHPCs as an active electrode material and CO2 adsorbents were investigated for supercapacitor and CO2 capture applications. Lignin-derived heteroatom-doped porous carbon 850 shows an outstanding gravimetric specific capacitance of 372 F g−1 and excellent cyclic stability over 30,000 cycles in 1 M KOH. Lignin-derived heteroatom-doped porous carbon 700 displays a remarkable CO2 capture capacity of up to 4.8 mmol g−1 (1 bar and 298 K). This study illustrates the effective transformation of a sustainable waste product into a highly functional carbon material for energy storage and CO2 separation applications.