title: Promising porous carbon derived from celtuce leaves with outstanding supercapacitance and CO₂ capture performance.
abstract: Business costs and energy/environmental concerns have increased interested in biomass materials for production of activated carbons, especially as electrode materials for supercapacitors or as solid-state adsorbents in CO₂ adsorption area. In this paper, waste celtuce leaves were used to prepare porous carbon by air-drying, pyrolysis at 600 °C in argon, followed by KOH activation. The as-prepared porous carbon have a very high specific surface area of 3404 m²/g and a large pore volume of 1.88 cm³/g. As an electroactive material, the porous carbon exhibits good capacitive performance in KOH aqueous electrolyte, with the specific capacitances of 421 and 273 F/g in three and two-electrode systems, respectively. As a solid-state adsorbent, the porous carbon has an excellent CO₂ adsorption capacity at ambient pressures of up to 6.04 and 4.36 mmol/g at 0 and 25 °C, respectively. With simple production process, excellent recyclability and regeneration stability, the porous carbon that was derived from celtuce leaves is among the most promising materials for high-performance supercapacitors and CO₂ capture.
authors.affiliation: Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P. R. China.
authors.forename: Rutao
authors.initials: R
authors.lastname: Wang
authors.forename: Peiyu
authors.initials: P
authors.lastname: Wang
authors.forename: Xingbin
authors.initials: X
authors.lastname: Yan
authors.forename: Junwei
authors.initials: J
authors.lastname: Lang
authors.forename: Chao
authors.initials: C
authors.lastname: Peng
authors.forename: Qunji
authors.initials: Q
authors.lastname: Xue
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002245:Carbon Dioxide / Q000302:isolation & purification*; D025802:Electric Capacitance; D011211:Electric Power Supplies; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D018515:Plant Leaves / Q000737:chemistry*; D016062:Porosity
chemical_list: D002245:Carbon Dioxide; D002244:Carbon