Faculty of Chemistry and Environment Science, Guangdong Ocean University, Zhanjiang 524088, China.
Molecules. 2022 Jul 20;27(14):4620. doi: 10.3390/molecules27144620.
Carbon dots (CDs) have many advantages, such as tunable photoluminescence, large two-photon absorption cross-sections, easy functionalization, low toxicity, chemical inertness, good dispersion, and biocompatibility. Halogen doping further improves the optical and physicochemical properties of CDs, extending their applications in fluorescence sensors, biomedicine, photocatalysis, anti-counterfeiting encryption, and light-emitting diodes. This review briefly describes the preparation of CDs via the "top-down" and "bottom-up" approaches and discusses the preparation methods and applications of halogen (fluorine, chlorine, bromine, and iodine)-doped CDs. The main challenges of CDs in the future are the elucidation of the luminescence mechanism, fine doping with elements (proportion, position, etc.), and their incorporation in practical devices.
碳点 (CDs) 具有许多优点，例如可调谐的光致发光、大的双光子吸收截面、易于功能化、低毒性、化学惰性、良好的分散性和生物相容性。卤素掺杂进一步改善了 CDs 的光学和物理化学性质，扩展了它们在荧光传感器、生物医学、光催化、防伪加密和发光二极管中的应用。本综述简要描述了通过“自上而下”和“自下而上”方法制备 CDs，并讨论了卤素（氟、氯、溴和碘）掺杂 CDs 的制备方法和应用。未来 CDs 的主要挑战是阐明发光机制、精细掺杂元素（比例、位置等）以及将其纳入实际器件中。
