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From waste Coca Cola® to activated carbons with impressive capabilities for CO2 adsorption and supercapacitors

Abstract : We herein report the synthesis of heteroatoms doped, high surface area microporous activated carbons (AC) by utilisation of Coca Cola® as a potential source of waste biomass, for applications as CO2 adsorbent and electrodes of supercapacitors. N, S dual doped carbon spheres are firstly obtained by hydrothermal treatment of Coca Cola® and then thermally activated by either KOH or ZnCl2. The resulting KOH activated carbon material (CMC-3) exhibits extremely high adsorption capability for CO2 with 5.22 mmol g−1 at 25 °C and 1 atm, one of the highest values ever recorded for a carbonaceous material. On the other hand, ZnCl2 activated carbon material (CMC-2) performs excellently as an electrode for supercapacitor, exhibiting very high specific capacitance of 352.7 F g−1 at a current density of 1 A g−1 in 6 M KOH electrolyte, which again is one of the highest values recorded for a biomass derived AC. Coca Cola® has high content in carbon as sugars, provides in-situ doping of O, N and S and has constant composition, as opposed to other conventional biomass materials, making it an attractive and cheap alternative for synthesis of high performance AC for environmental and energy storage purposes.
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https://hal.univ-lille.fr/hal-03180873
Contributeur : Lilloa Université de Lille <>
Soumis le : jeudi 25 mars 2021 - 12:13:38
Dernière modification le : vendredi 26 mars 2021 - 03:20:34

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Yash Boyjoo, Yi Cheng, Hua Zhong, Hao Tian, Jian Pan, et al.. From waste Coca Cola® to activated carbons with impressive capabilities for CO2 adsorption and supercapacitors. Carbon, Elsevier, 2017, Carbon, 116, pp.490-499. ⟨10.1016/j.carbon.2017.02.030⟩. ⟨hal-03180873⟩

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