ชื่อผลงาน : The use of S2O82- and H2O2 as novel specific masking agents for highly selective “turn-on” fluorescent switching recognition of CN- and I- based on Hg2+- graphene quantum dots.
รายละเอียด : In this study, we report that both CN- and I- can enhance the ?uorescent intensity of Hg2+–graphene quantum dots (Hg2+–GQDs). However, the selectivity of the sensor was poor. Accordingly, simple speci?c masking agents can be directly used to solve this problem. Here, for the ?rst time, we report the use of persulfate ion (S2O82-) as a turn-on ?uorescent probe of Hg2+–GQDs for selective CN???? detection, while hydrogen peroxide (H2O2) was selected for its sensing ability towards I- ion detection. Interestingly, the signal was immediately measured after addition of the masking agent to Hg2+–GQDs and the sample because its interaction was very fast and e?cient. The method had a linear response in the concentration ranges of 0.5–8 mM(R2 = 0.9994) and 1–12 mM(R2 = 0.9998) with detection limit
