ArticleHeliyon2024
Development of an active agar aerogel with dual antioxidant and UV-blocking activities using chlorine-doped graphene quantum dots.
Article in Heliyon, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Active packaging is of great interest in the modern food industry due to increasing shelf life and enhancing food quality. The importance of this technology increases when natural polymers are used in the construction of active packages. Development of a natural, biodegradable, and dual-active film was aimed in this study. So, agar aerogel containing different amounts of chlorine-doped graphene quantum dots (Cl-GQDs) was prepared. Cl-GQDs had excitation-dependent fluorimetry behavior due to the zigzag edges of graphene. The mean diameter of spherical nanoparticles of Cl-GQDs was about 12 nm, according to HR-TEM images. The results of Raman and ATR-FTIR confirmed that chlorine was well-doped on the GQD structure. Cl-GQDs showed high UV-absorption capability and very strong antioxidant activity (94.31 %), which maintained these activities after incorporation into the agar aerogel. The doped chlorine was responsible for the capacity to charge transfer of GQDs. BET and SEM results showed that adding Cl-GQDs to agar caused a porous structure. Finally, different types of agar aerogels containing Cl-GQDs can be used considering the intended application of aerogel. Agar aerogel containing 20 % Cl-GQDs is suggested if a porous aerogel with good thermal insulation properties is considered. However, agar aerogel containing 1 % Cl-GQDs is suitable as an active film. In conclusion, while Cl-GQDs hold promise as sustainable and multifunctional food packaging materials, their potential toxic effects must be thoroughly evaluated. Future studies should explore migration, potential interactions with specific food matrices, and long-term safety to ensure consumer protection.
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