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<p>This study explores the application of green carbon dots (CDs) as sustainable nanotaggants for determining the quality and authenticity of ethanol fuel. Ethanol, a key renewable biofuel, faces challenges related to adulteration and traceability, requiring innovative solutions to ensure this. In this study, CDs were synthesized from two sugarcane by-products via hydrothermal and solvothermal methods and characterized using UV-Vis and photoluminescence spectroscopies, Fourier transform infrared spectroscopy, Zeta potential analysis, and transmission electron microscopy. The synthesized CDs were added to anhydrous ethanol and exhibited strong absorption and emission spectra with blue photoluminescence. They also demonstrated optical stability over 4 years and full compatibility with anhydrous ethanol, without altering its physicochemical properties. These findings suggest that CDs offer a promising, eco-friendly potential for fuel authentication and quality monitoring. By leveraging waste-derived nanomaterials, this study advances green chemistry principles and provides a viable strategy for reinforcing ethanol fuel integrity in the biofuel industry.</p>

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Eco-friendly carbon dots obtained from renewable sources: novel nanotaggants for ethanol fuel

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月6日

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  • Nadson Humberto Costa Ferrer,
  • Maria Alice Melo de Pinheiro,
  • Aquiles Silva do Nascimento,
  • Vitor Davis Melo,
  • Dayane Caroline Tenório e Silva,
  • João Victor Araújo de Lima,
  • Paulo Euzébio Cabral Filho,
  • Adriana Fontes,
  • Beate Saegesser Santos,
  • Luiz Stragevitch,
  • Elisa Soares Leite

摘要

This study explores the application of green carbon dots (CDs) as sustainable nanotaggants for determining the quality and authenticity of ethanol fuel. Ethanol, a key renewable biofuel, faces challenges related to adulteration and traceability, requiring innovative solutions to ensure this. In this study, CDs were synthesized from two sugarcane by-products via hydrothermal and solvothermal methods and characterized using UV-Vis and photoluminescence spectroscopies, Fourier transform infrared spectroscopy, Zeta potential analysis, and transmission electron microscopy. The synthesized CDs were added to anhydrous ethanol and exhibited strong absorption and emission spectra with blue photoluminescence. They also demonstrated optical stability over 4 years and full compatibility with anhydrous ethanol, without altering its physicochemical properties. These findings suggest that CDs offer a promising, eco-friendly potential for fuel authentication and quality monitoring. By leveraging waste-derived nanomaterials, this study advances green chemistry principles and provides a viable strategy for reinforcing ethanol fuel integrity in the biofuel industry.