Carbon quantum dots synthesis from waste and by-products: Perspectives and challenges

•Waste have been used in Carbon dots synthesis with high quantum yield.•Vegetable waste stands out as a reliable source for carbon dots synthesis.•The presence of functional groups in raw material improves carbon dots properties.•The hydrothermal method stands out as a low cost and adaptable approac...

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Bibliographic Details
Published in:Materials letters 2021-01, Vol.282, p.128764, Article 128764
Main Authors: de Oliveira, Bruno Peixoto, da Silva Abreu, Flávia Oliveira Monteiro
Format: Article
Language:English
Subjects:
Biocompatibility
By products
Byproducts
Carbon dots
Conversion
Environmental impact
Flowers
Fluorescence
Industrial wastes
Materials science
Nano-biomaterials
Nanomaterials
Natural resources
Optical materials and properties
Photoluminescence
Photovoltaic cells
Pollutants
Quantum dots
Solar cells
Synthesis
Toxicity
Waste and by-products
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Summary:•Waste have been used in Carbon dots synthesis with high quantum yield.•Vegetable waste stands out as a reliable source for carbon dots synthesis.•The presence of functional groups in raw material improves carbon dots properties.•The hydrothermal method stands out as a low cost and adaptable approach.•Related reports in the future should focus on the yield of carbon dots production. Carbon dots (CDs) are a novel class of fluorescent nanomaterials, with properties such as photoluminescence, high solubility, low toxicity, and favorable biocompatibility. They are useful for applications in biomedicine, sensors, solar cells, and photocatalysis, among others. CDs synthesis using vegetal, animal, or industrial waste as a source has become a focus of interest among researchers. These waste materials are inexpensive and available at large, and the repurposing of natural resources has the potential to reduce pollutants and their environmental impacts. Residues from plant sources, such as peels, leaves, and flowers, are preferred over other sources, and the conversion to CDs is performed mainly through the hydrothermal method. However, some matters regarding this technology require further studies and elucidation, such as the increase CD’s conversion yield from the raw material. Thus, we aimed to explore the use of waste and by-products in CDs synthesis, their potentials, and advantages, as well as present current challenges in the field of study.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.128764