CAJ | 학술논문

本实验以苹果汁为原料，通过一步水热法合成得到了水溶性好及稳定性高的蓝色荧光碳量子点。研究发现 Hg2+对碳量子点荧光有良好的猝灭作用，从而建立了一种快速检测 Hg2+的新方法。实验发现在pH 7.0磷酸盐缓冲介质中碳量子点荧光猝灭强度与Hg2+浓度在5~100 nmol/L和1~50μmol/L范围内呈线性关系，检出限为2.3 nmol/L(S/N=3)。本方法可用于实际水样中Hg2+的测定。
본실험이평과즙위원료，통과일보수열법합성득도료수용성호급은정성고적람색형광탄양자점。연구발현 Hg2+대탄양자점형광유량호적졸멸작용，종이건립료일충쾌속검측 Hg2+적신방법。실험발현재pH 7.0린산염완충개질중탄양자점형광졸멸강도여Hg2+농도재5~100 nmol/L화1~50μmol/L범위내정선성관계，검출한위2.3 nmol/L(S/N=3)。본방법가용우실제수양중Hg2+적측정。
Fluorescent carbon quantum dots ( CQDs) were synthesized by one-step hydrothermal treatment of apple juice. Experiments showed that Hg2+could quench the fluorescence of the CQDs with specificity. Based on this phenomenon, a selective and sensitive sensor was constructed for Hg2+ detection. In a NaH2 PO4-Na2HPO4 buffer solution (pH 7. 0), their fluorescence intensity showed good linear relationship with the concentrations of Hg2+ from 5 to 100 nmol/L and 1 to 50 μmol/L, respectively, with the detection limit of 2. 3 nmol/L (S/N=3). Its practical application was further demonstrated by the detection of Hg2+ in real water samples.