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Halogen-Doped Carbon Dots: Synthesis, Application, and Prospects.

Kun Luo1, Yanmei Wen1, Xinhuang Kang1

  • 1Faculty of Chemistry and Environment Science, Guangdong Ocean University, Zhanjiang 524088, China.

Molecules (Basel, Switzerland)
|July 27, 2022
PubMed
Summary

Halogen-doped carbon dots (CDs) offer enhanced properties for diverse applications. This review covers their preparation, focusing on halogen doping to improve optical and physicochemical characteristics for advanced technologies.

Keywords:
applicationsbiomedicinecarbon dotsfluorescencehalogen dopingsensors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Carbon dots (CDs) possess advantageous properties like tunable photoluminescence, large two-photon absorption, and biocompatibility.
  • Halogen doping significantly enhances the optical and physicochemical characteristics of CDs.
  • These improvements broaden the application scope of CDs in various fields.

Purpose of the Study:

  • To review the preparation methods of carbon dots (CDs) using both "top-down" and "bottom-up" approaches.
  • To discuss the preparation techniques and applications of halogen-doped CDs (F, Cl, Br, I).
  • To highlight future challenges in the field of carbon dots.

Main Methods:

  • Overview of "top-down" and "bottom-up" synthesis strategies for carbon dots.
  • Detailed discussion on methods for incorporating halogens (F, Cl, Br, I) into carbon dots.
  • Compilation of current applications and potential future uses of halogen-doped CDs.

Main Results:

  • Halogen doping demonstrably improves the photoluminescence and other optical properties of carbon dots.
  • Enhanced carbon dots show promise in fluorescence sensing, biomedicine, photocatalysis, and anti-counterfeiting.
  • Various halogen elements (F, Cl, Br, I) can be utilized for doping, each offering specific property modifications.

Conclusions:

  • Halogen-doped carbon dots represent a significant advancement over pristine CDs, expanding their utility.
  • Future research should focus on understanding luminescence mechanisms and precise elemental doping.
  • Integration of these advanced materials into practical devices is a key future direction.