One-step synthesis of K3PO4-activated phosphorus-enriched carbons for enhanced carbon capture
Journal of Environmental Chemical Engineering, cilt.13, sa.3, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 13 Sayı: 3
- Basım Tarihi: 2025
- Doi Numarası: 10.1016/j.jece.2025.116694
- Dergi Adı: Journal of Environmental Chemical Engineering
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Anahtar Kelimeler: Phosphorus-doped porous carbons, CO2 adsorption, Lotus petiole biomass, Tripotassium phosphate
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
To date, most studies on porous carbon have focused on enhancing CO2 uptake capacity by decorating the carbon surface with nitrogen (N) or sulfur (S) functional groups. However, a literature survey reveals a notable gap in research on phosphorus (P)-doped porous carbon for surface modification. To address this gap, the present study focuses on the synthesis of P-decorated carbons using lotus petiole biomass as a renewable and sustainable precursor. This was achieved through a single-step process involving P-doping and chemical activation with tripotassium phosphate (K3PO4) of carbonized lotus petiole at elevated temperatures. The resulting P-doped porous carbons exhibited advanced textural properties, with a maximum surface area of 472 m2/g, a total pore volume of 0.27 cm3 /g, and phosphorus doping of up to 4.63 wt%. The optimal carbon-based adsorbent demonstrated CO2 adsorption capacities of 2.57 mmol/g at 25°C and 3.36 mmol/g at 0°C under 1 bar pressure. Additionally, the materials showed excellent durability, exhibiting almost no change in performance after consecutive adsorption-desorption cycles. These P-doped porous carbons also displayed high CO2/N2 selectivity, moderate heat of adsorption, rapid adsorption kinetics, and outstanding dynamic CO2 capture performance under continuous gas flow conditions. This study provides a novel and sustainable approach to converting lotus petioles into high-performance adsorbents, with significant implications for achieving carbon neutrality and advancing environmental sustainability.