期刊
RSC ADVANCES
卷 8, 期 3, 页码 1407-1417出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra12327b
关键词
-
资金
- Materials Chemistry Research Center, Faculty of Science, Khon Kaen University
- Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University
- Ministry of Science and Technology, Bangkok, Thailand
- Department of Chemistry, Faculty of Science, Khon Kaen University
In this study, we report that both CN- and I- can enhance the fluorescent intensity of Hg2+-graphene quantum dots (Hg2+-GQDs). However, the selectivity of the sensor was poor. Accordingly, simple specific masking agents can be directly used to solve this problem. Here, for the first time, we report the use of persulfate ion (S2O82-) as a turn-on fluorescent 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 efficient. The method had a linear response in the concentration ranges of 0.5-8 mu M (R-2 = 0.9994) and 1-12 mu M (R-2 = 0.9998) with detection limits of 0.17 and 0.20 mu M for CN- and I-, respectively. The sensor was successfully used for the dual detection of both CN- and I- in real water samples with satisfactory results. In conclusion, the specific masking agents in a Hg2+-GQDs system appeared to be good candidates for fluorometric turn-on sensors for CN- and I- with excellent selectivity over other ions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据