Scholarlink

<p>The green synthesis of Carbon Quantum Dots (CQDs) has gained substantial attention due to their environmentally friendly production routes and versatile applications in biomedicine, sensing, catalysis, and optoelectronic technologies. In this study, highly fluorescent CQDs were synthesized from <i>Citrus limetta</i> (sweet lemon) juice via a simple, one-pot hydrothermal carbonization process. The naturally abundant organic acids, sugars, and nitrogenous components present in sweet lemon served as efficient carbon and heteroatom sources, enabling the formation of strongly emissive CQDs without the need for toxic reagents or complex treatments. The resulting CQDs exhibited bright green fluorescence under Ultraviolet (UV) illumination, excellent aqueous solubility, and low toxicity. A remarkable quantum yield of 9.28% was achieved at an excitation wavelength of 370&#xa0;nm. Structural and surface analyses using X-ray Photoelectron Spectroscopy and zeta potential measurements confirmed the presence of oxygen-rich functional groups that contribute to colloidal stability. X-ray diffraction, Scanning Electron Microscopy, and Dynamic Light Scattering revealed that the CQDs are predominantly spherical, amorphous to poorly crystalline, and range in size from 5 to 22&#xa0;nm with an average diameter of ~ 10&#xa0;nm. The Prepared nontoxic nature of synthesized CQDS is used for various applications, such as bioimaging, Drug delivery, and metal ion detection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Green synthesis of highly fluorescent carbon quantum dots from Citrus limetta juice

  • 期刊论文

  • 发表日期：

    2026年3月10日

查看全文
  • Laxmi Mehra,
  • Meenakshi Rana,
  • Shradha Lakhera,
  • Deepak Butola,
  • L. P. Purohit,
  • Mridula Sharma,
  • Kamal Devlal

摘要

The green synthesis of Carbon Quantum Dots (CQDs) has gained substantial attention due to their environmentally friendly production routes and versatile applications in biomedicine, sensing, catalysis, and optoelectronic technologies. In this study, highly fluorescent CQDs were synthesized from Citrus limetta (sweet lemon) juice via a simple, one-pot hydrothermal carbonization process. The naturally abundant organic acids, sugars, and nitrogenous components present in sweet lemon served as efficient carbon and heteroatom sources, enabling the formation of strongly emissive CQDs without the need for toxic reagents or complex treatments. The resulting CQDs exhibited bright green fluorescence under Ultraviolet (UV) illumination, excellent aqueous solubility, and low toxicity. A remarkable quantum yield of 9.28% was achieved at an excitation wavelength of 370 nm. Structural and surface analyses using X-ray Photoelectron Spectroscopy and zeta potential measurements confirmed the presence of oxygen-rich functional groups that contribute to colloidal stability. X-ray diffraction, Scanning Electron Microscopy, and Dynamic Light Scattering revealed that the CQDs are predominantly spherical, amorphous to poorly crystalline, and range in size from 5 to 22 nm with an average diameter of ~ 10 nm. The Prepared nontoxic nature of synthesized CQDS is used for various applications, such as bioimaging, Drug delivery, and metal ion detection.