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<p>Quantum dots (QDs) have a high light conversion coefficient, and the light they re-emit tends to have a very narrow spectrum. Graphene is considered one of the leading candidates for its application as a future element in nanoelectronics. Pure graphene is of interest as a highly durable membrane or a highly efficient sensor, while graphene quantum dots (GQDs) with a modified surface can be used in semiconductor electronics as a basis for organic diodes, light emitters, biosensors, and chemical sensors. The methods for producing graphene quantum dots involve the use of toxic compounds such as acids (HNO<sub>3</sub>, H<sub>2</sub>SO<sub>4</sub>), KMnO<sub>4</sub>, sodium borohydride, hydrazine hydrate, and dimethylhydrazine. The aim of this research is to carry out the "greener" synthesis of graphene quantum dots (GQDs). Ultrasound was applied for 12&#xa0;h to black carbon and graphite precursors with reducing agents. The obtained nanoparticles were characterized by FTIR spectroscopy and UV–Vis spectroscopy.</p> Graphical abstract <p></p>

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Green synthesis and study of the luminescent properties of graphene quantum dots

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • Isauro Alejandro Treviño Pérez,
  • Brayan Ivan de la Cruz Martínez,
  • Daniela Sarahi Zúñiga Bueno,
  • Oxana V. Kharissova,
  • Dalmy Lucia Ochoa Gamboa,
  • Idalia Gómez de la Fuente,
  • Boris I. Kharissov

摘要

Quantum dots (QDs) have a high light conversion coefficient, and the light they re-emit tends to have a very narrow spectrum. Graphene is considered one of the leading candidates for its application as a future element in nanoelectronics. Pure graphene is of interest as a highly durable membrane or a highly efficient sensor, while graphene quantum dots (GQDs) with a modified surface can be used in semiconductor electronics as a basis for organic diodes, light emitters, biosensors, and chemical sensors. The methods for producing graphene quantum dots involve the use of toxic compounds such as acids (HNO3, H2SO4), KMnO4, sodium borohydride, hydrazine hydrate, and dimethylhydrazine. The aim of this research is to carry out the "greener" synthesis of graphene quantum dots (GQDs). Ultrasound was applied for 12 h to black carbon and graphite precursors with reducing agents. The obtained nanoparticles were characterized by FTIR spectroscopy and UV–Vis spectroscopy.

Graphical abstract