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<p>Carbon nanodots (CNDs) are fluorescent materials that have achieved high quantum efficiencies. These materials are scalable because they can be obtained by a simple and inexpensive synthesis. They represent a way to obtain environmentally friendly technology because of the low toxicity of these structures. Due to this, in the present work, we report the synthesis and optical characterization of CNDs by hydrothermal treatment of pure lemon juice in the immature stage. The synthesized CNDs were characterized by ultraviolet–visible spectroscopy. The synthesized CNDs present two predominant photoluminescence (PL) bands, centered at 550&#xa0;nm and 672&#xa0;nm. The band centered at 550&#xa0;nm is associated with the conventional PL of CNDs, and the band centered at 672&#xa0;nm is associated with the presence of chlorophyll in pure lemon juice in the immature stage. This PL displayed by the CQDs constitutes a dual emission integral range from 400 to 800&#xa0;nm.</p> Graphical abstract <p></p>

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Synthesis of dual-emitting carbon dots by hydrothermal treatment of pure lemon juice

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • H. Ponce,
  • J. Humberstone

摘要

Carbon nanodots (CNDs) are fluorescent materials that have achieved high quantum efficiencies. These materials are scalable because they can be obtained by a simple and inexpensive synthesis. They represent a way to obtain environmentally friendly technology because of the low toxicity of these structures. Due to this, in the present work, we report the synthesis and optical characterization of CNDs by hydrothermal treatment of pure lemon juice in the immature stage. The synthesized CNDs were characterized by ultraviolet–visible spectroscopy. The synthesized CNDs present two predominant photoluminescence (PL) bands, centered at 550 nm and 672 nm. The band centered at 550 nm is associated with the conventional PL of CNDs, and the band centered at 672 nm is associated with the presence of chlorophyll in pure lemon juice in the immature stage. This PL displayed by the CQDs constitutes a dual emission integral range from 400 to 800 nm.

Graphical abstract