Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China.
Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
Anal Sci. 2021 Sep 10;37(9):1227-1234. doi: 10.2116/analsci.20P433. Epub 2021 Jan 15.
In our work, N-doped carbon dots (CDs) were synthesized by a facile hydrothermal method with fermented rice as the carbon source. The CDs show bright blue fluorescence, and the maximum emission wavelength was 380 nm with wavelength ranges from 320 to 560 nm. Interestingly, these as-prepared CDs show strong blue photoluminescent properties under the radiation with ultraviolet (UV) light. Moreover, it also exhibits good sensitive fluorescence detection for Fe ions; the detection limit is 0.1 μM, which is significant fluorescence quenching based on CDs. Other representative metal ions were further tested to verify their selectivity, which provides a solid underpinning for the practical use in Fe ions detection in real samples, e.g. underground water. In addition, the CDs work well as a fluorescent ink and can encrypt and store information.
在我们的工作中，氮掺杂碳点（CDs）是通过一种简单的水热法合成的，以发酵大米为碳源。这些 CDs 呈现出明亮的蓝色荧光，最大发射波长为 380nm，波长范围从 320nm 到 560nm。有趣的是，这些制备的 CDs 在紫外（UV）光的辐射下显示出强烈的蓝色光致发光性能。此外，它还对 Fe 离子表现出良好的灵敏荧光检测性能；检测限为 0.1μM，这是基于 CDs 的显著荧光猝灭。进一步测试了其他代表性金属离子，以验证其选择性，这为实际样品中 Fe 离子检测的实际应用提供了坚实的基础，例如地下水。此外，CDs 作为荧光墨水效果良好，可以加密和存储信息。
