Başoğlu Aysel
Department of Occupational Health and Safety, Faculty of Health, Gümüşhane University, Gümüşhane, Turkey.
Luminescence. 2025 Feb;40(2):e70099. doi: 10.1002/bio.70099.
Water-soluble fluorescent carbon quantum dots (CQDs) were synthesized via a single-step, eco-friendly hydrothermal process using Robinia hispida L. flowers as a novel carbon source. Advanced characterization techniques (HRTEM, XRD, XPS, FTIR, UV-vis, and fluorescence spectroscopy) revealed spherical CQDs with an average size of 3.96 ± 0.83 nm and a quantum yield of 5.13%. Under 365 nm UV light, the CQDs emitted blue fluorescence. Fluorescence quenching studies with various metal ions showed a significant 93.5% reduction in FL intensity with 500 μM Au ions. At pH 7.0, a linear detection range of 0.5-3.5 μM was achieved, with limits of detection (LOD) and quantification (LOQ) of 0.4 and 1.2 μM, respectively. The non-functionalized CQDs effectively detected Au ions in tap, drinking, and river water, acidic mine drainage (sludge), and a standard reference material (CRMSA-C Sandy Soil C), achieving spike recoveries of 96.06%-101.71% with variability below 4.13%.
采用单步、环保的水热法，以洋槐花花为新型碳源，合成了水溶性荧光碳量子点（CQD）。先进的表征技术（高分辨透射电子显微镜、X射线衍射、X射线光电子能谱、傅里叶变换红外光谱、紫外可见光谱和荧光光谱）显示，CQD呈球形，平均尺寸为3.96±0.83纳米，量子产率为5.13%。在365纳米紫外光下，CQD发出蓝色荧光。对各种金属离子的荧光猝灭研究表明，500微摩尔金离子使荧光强度显著降低了93.5%。在pH值为7.0时，实现了0.5 - 3.5微摩尔的线性检测范围，检测限（LOD）和定量限（LOQ）分别为0.4和1.2微摩尔。未功能化的CQD能有效检测自来水、饮用水、河水、酸性矿山排水（污泥）和标准参考物质（CRMSA - C砂质土壤C）中的金离子，加标回收率为96.06% - 101.71%，变异系数低于4.13%。
