Physicochemical Properties of Nitrogen Doped Carbon Nano‐onions Grown by Flame Pyrolysis from Grapeseed Oil for Use in Supercapacitors

Shaku, Bokome; Mofokeng, Thapelo P.; Mongwe, Thomas H.; Coville, Neil J.; Ozoemena, Kenneth I.; Maubane‐Nkadimeng, Manoko S.

doi:10.1002/elan.202060383

Cited by 21 publications

(3 citation statements)

References 79 publications

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“…Various biomass materials, such as watermelon peel, sago waste, coffee grounds, and plant leaves, can be used as carbon sources for producing C-dots through pyrolysis. The properties of the resulting C-dots can be adjusted by changing the pyrolysis conditions, including temperature, duration, and pH value of the reaction systems [155]. The resulting C-dots have outstanding water solubility, intense blue luminescence, and strong stability in solutions with high salinity and a broad pH range.…”

Section: Biomassmentioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

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Nanotechnology sparks discussions and concerns about the impacts of new nanomaterials on health and the environment. It holds importance in various domains due to its unique struc-tures. Carbon dots (C-dots) are versatile nanomaterials with applications in bioimaging, sensing, catalysis, polymers, solar cells, and more. They offer desirable characteristics such as stability, cost-effectiveness, biocompatibility, and high photoluminescent quantum yield. C-dots have the potential to replace expensive fluorophores in solar cells. They are catego-rized as carbon quantum dots, graphene quantum dots, and carbonized polymer dots. C-dots have outstanding optical and photoelectric properties with low toxicity. Bottom-up and top-down approaches are used for the synthesis of carbon dots (CDs), with each method im-pacting their physicochemical characteristics. The choice of synthesis method depends on de-sired properties and application requirements. Researchers combine these methods and ex-plore new approaches to enhance synthesis efficiency and tailor CD properties. CDs have di-verse chemical structures with modified oxygen, polymer-based, or amino groups on their surface. Various characterization methods such as HRTEM, XPS, and optical analysis (PL, UV) are used to determine CD structure. Carbon dots (CDs) are cutting-edge fluorescent nano-materials with remarkable qualities such as biocompatibility, low toxicity, environmental friendliness, high water solubility, and photo-stability. They are easily adjustable in terms of their optical properties, making them highly versatile in various fields. CDs find applications in bio-imaging, nanomedicine, drug delivery, solar cells, LEDs, photo-catalysis, elec-tro-catalysis, and other related areas.

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Section: Biomassmentioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

View full text Add to dashboard Cite

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“…The synthesis of CNO support was performed using a modified cheap candle soot approach described by Pandey et al 31,32 This method would aid in the overall cost reduction of the electrocatalyst as per the synthesis method compared to the flame pyrolysis method, which is the most utilized method to synthesize CNOs. 33 Typically, soot from a burning candle was collected on a copper substrate. The freshly collected soot was crushed into a fine black powder and kept in an airtight container.…”

Section: Synthesis and Functionalization Of Cnosmentioning

confidence: 99%

Studies on the Catalytic Properties of Palladium–Niobium Electrocatalysts Supported on Carbon Nano-onions toward Isopropanol and Ethanol Electro-oxidation in an Alkaline Medium

Zikhali,

Matthews,

Selepe

et al. 2024

Chem. Mater.

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“…There are few pieces of research in the literature about the electrochemical performance of porous carbon made from bio-oil. Most use one or more techniques to enhance performance, such as chemical activation, doping, or template [12][13][14][15][16][17]. However, several steps that are used to produce suitable properties increase the final cost of the porous carbon and represent a limiting factor in terms of scaling-up production.…”

Section: Introductionmentioning

confidence: 99%

Xerogel-like Materials from Sustainable Sources: Properties and Electrochemical Performances

et al. 2021

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Energy storage is currently one of the most significant technological challenges globally, and supercapacitor is a prominent candidate over batteries due to its ability for fast charging and long lifetime. Supercapacitors typically use porous carbon as electrodes, because of both the high conductivity and surface area of the material. However, the state-of-the-art porous carbon described in the literature uses toxic chemicals and complex procedures that enhance costs and pollute the environment. Thus, a more sustainable procedure to produce porous carbon is highly desirable. In this context, xerogel-like carbons were prepared by a new, cheap, simple route to polymerization reactions of tannin-formaldehyde in a bio-oil by-product. Using bio-oil in its natural pH allowed a cost reduction and avoided using new reactants to change the reactional medium. Textural properties and electrochemical performances were improved by fast activating the material per 20 min. The non-activated carbon xerogel presented a capacitance of 92 F/g, while the activated one had 132 F/g, given that 77% of the components used are eco-friendly. These results demonstrate that renewable materials may find applications as carbon electrodes for supercapacitors. Overhauling the synthesis route with a different pH or replacing formaldehyde may enhance performance or provide a 100% sustainable carbon electrode.

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Physicochemical Properties of Nitrogen Doped Carbon Nano‐onions Grown by Flame Pyrolysis from Grapeseed Oil for Use in Supercapacitors

Cited by 21 publications

References 79 publications

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Studies on the Catalytic Properties of Palladium–Niobium Electrocatalysts Supported on Carbon Nano-onions toward Isopropanol and Ethanol Electro-oxidation in an Alkaline Medium

Xerogel-like Materials from Sustainable Sources: Properties and Electrochemical Performances

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