$ Ce^{3+} $ 增强的铜纳米团簇用于水样中对硝基苯酚的检测

水中危害物的快速检测分析至关重要,文章以3-巯基丙酸(MPA)作为配体合成铜纳米团簇,通过引入稀土金属铈离子 $ \left(\mathrm{Ce}^{3+}\right) $,可提高荧光强度约100倍。由于该团簇对对硝基苯酚具有选择性,以此构建 $ Ce^{3+} $增强的铜纳米团簇 $ \left(\mathrm{Ce}^{3+}/\mathrm{MPA}-\mathrm{Cu}-\mathrm{NCs}\right) $,实现对硝基苯酚的特异性检测,检测限为0.13 $ \mu $mol/L。通过加标回收试验,验证其在自来水和湖水实际样品中对对硝基苯酚的检测能力,加标回收率在95.7%~109.3%之间,相对标准偏差值均低于5%,表明该荧光探针对水样中的对硝基苯酚具有良好的检测前景。

The rapid detection and analysis of hazardous substances in water is essential. This paper reports the synthesis of copper nanoclusters using 3-Mercaptopropionic acid (MPA) as a ligand, which can significantly increase the fluorescence intensity (about 100 times) by introducing rare earth metal cerium ions $ (\mathrm{Ce}^{3+}) $. Due to the selectivity of the cluster for p-nitrophenol (p-NP), $ Ce^{3+} $-enhanced copper nanoclusters $ (\mathrm{Ce}^{3+}/\mathrm{MPA}-\mathrm{Cu}\ \mathrm{NCs}) $ were constructed to achieve the specific detection of p-NP with a detection limit of $ 0.13\ \mu mol/L $. The ability to detect p-NP in actual samples of tap water and lake water was verified by spiked recovery tests, and the spiked recoveries ranged from 95.7% to 109.3% with the relative standard deviation value below 5%, indicating that the fluorescent probe is promising for the detection of p-NP in water samples.