Functional utilization of biochar derived from Tenebrio molitor feces for CO2 capture and supercapacitor applications.
RSC Adv
; 12(35): 22760-22769, 2022 Aug 10.
Article
em En
| MEDLINE
| ID: mdl-36105956
ABSTRACT
Biochar has attracted great interest in both CO2 capture and supercapacitor applications due to its unique physicochemical properties and low cost. Fabrication of eco-friendly and cost-effective biochar from high potential biomass Tenebrio molitor feces can not only realize the functional application of waste, but also a potential way of future carbon capture and energy storage technology. In this study, a novel KOH activation waste-fed Tenebrio molitor feces biochar (TMFB) was developed and investigated in terms of CO2 capture and electrochemical performance. When activated at 700 °C for 1 h, the specific surface area of the feces biochar (TMFB-700A) increased significantly from 232.1 to 2081.8 m2 g-1. In addition, well-developed pore distribution facilitates CO2 capture and electrolyte diffusion. TMFB-700A can quickly adsorb a large amount of CO2 (3.05 mol kg-1) with excellent recycling performance. TMFB-700A also exhibited promising electrochemical performance (335.8 F g-1 at 0.5 A g-1) and was used as electrode material in a symmetrical supercapacitor. It provided a high energy density of 33.97 W h kg-1 at a power density of 0.25 kW kg-1 with 90.47% capacitance retention after 10 000 charge-discharge cycles. All the results demonstrated that TMFB could be a potential bifunctional material and provided valuable new insights for Tenebrio molitor feces high-value utilization.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article