JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 69 No 2 (2024): Journal of the Chilean Chemical Society
Original Research Papers

ONE-POT GREEN SYNTHESIS OF FLUORESCENT-QUANTUM CARBON DOTS FROM AVOCADO PEELS AND EVALUATION OF ITS ANTIMICROBIAL PROPETIES

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  • Nandis Fiallos,
  • Diana Correa,
  • Sergio Acuña,
  • Matias Venegas,
  • Francisco Bustamante,
  • Girlenne Christiansen,
  • Vanesa Roa,
  • Eduardo Schott,
  • Julio Alarcón,
  • Edgar Pastene
Edgar Pastene
Universidad del Bío-Bío
Published January 10, 2025
Keywords
  • Quantum carbon dots,
  • Hydrothermal,
  • Avocado peels,
  • HPLC
How to Cite
Fiallos, N., Correa, D., Acuña, S., Venegas, M., Bustamante, F., Christiansen, G., Roa, V., Schott, E., Alarcón, J., & Pastene, E. (2025). ONE-POT GREEN SYNTHESIS OF FLUORESCENT-QUANTUM CARBON DOTS FROM AVOCADO PEELS AND EVALUATION OF ITS ANTIMICROBIAL PROPETIES. Journal of the Chilean Chemical Society, 69(2), 6129-6134. Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/2633

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Abstract

In this work, avocado peel was chosen as a low-value waste that could be used as a carbon source to synthesize carbon dots (APCQDs). To obtain it, the hydrothermal method was used in the absence of co-doping agents. The synthesis was carried out for 6 hours at 250 ºC. After purification by dialysis and lyophilization, CQDs that exhibited intense blue fluorescence (emission at 378 nm) were obtained. Field emission scanning electron microscopy (FESEM), evidence the spherical morphology of carbon dots within nanometer range. HPLC analysis and separation showed excellent separation even in columns with low porosity, indicating a separation mechanism where polarity predominates as the property that governs the separation. It is highlighted that avocado peel CQDs have potent antimicrobial activity against the pathogens Listeria monocytogenes ATCC 7644, Escherichia coli ATCC 11775, Staphylococcus aureus ATCC 9144, and Salmonella enterica ATCC 13076. The antioxidant effect was also evidenced in the DPPH and ORAC-FL. The synthesis method for APCQDs could be easily scaled up for gram scale synthesis of carbon quantum dots.

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