- Title
- Morphologically tunable nanoarchitectonics of mixed kaolin-halloysite derived nitrogen-doped activated nanoporous carbons for supercapacitor and CO
2 capture applications - Creator
- Ramadass, Kavitha; Sathish, C. I.; Yi, Jiabao; Vinu, Ajayan; Singh, Gurwinder; Ruban, Sujanya M.; Ruban, Ajanya M.; Bahadur, Rohan; Kothandam, Gopalakrishnan; Belperio, Tony; Marsh, James; Karakoti, Ajay
- Relation
- Carbon Vol. 192, Issue 15 June 2022, p. 133-144
- Publisher Link
- http://dx.doi.org/10.1016/j.carbon.2022.02.047
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2022
- Description
- We report an integrated approach by combining in-situ activation, doping and natural nanotemplating to design low-cost and highly efficient N-doped nanoporous carbons for energy storage and carbon capture applications. N-doped nanoporous carbons are prepared by impregnating sucrose, 3-amino 1,2,4-triazole and the ZnCl2 into the nanochannels of the mixed kaolin-halloysite nanotube nanoclay, followed by carbonization and clay template removal. The prepared materials exhibit micro and mesoporosity, high specific surface areas (1360–1695 m2 g−1), and nitrogen content (7.73–12.34 wt%). The optimized material offers the specific capacitance of 299 F g−1 (0.3 A g−1) and 134 F g-1 (10 A g−1) with excellent cycling stability (91% capacity retention after 4000 cycles/5 A g−1). N-doping together with the interconnected micro and mesoporous structure, offers a more ion accessible surface and further provides enhanced charge transfer, hydrophilicity, and the interaction of the electrode-electrolyte ions. The optimized material adsorbs 24.4 mmol g−1 of CO2 at 30 bar pressure and 0 °C. The synthesized materials performed better as supercapacitor and CO2 adsorbent than halloysite clay, kaolin clay, activated carbon, nanoporous carbons, and mesoporous silica. The method presented here will provide a unique platform for synthesizing a series of advanced nanostructures for electrochemical and carbon capture applications.
- Subject
- nanoporous; nanocarbon; supercapacitance; heteroatom; mixed kaolin-halloysite nanclays; carbon capture; SDG 9; SDG 13; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1468722
- Identifier
- uon:48089
- Identifier
- ISSN:0008-6223
- Language
- eng
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