期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 145, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.inoche.2022.110047
关键词
B; N co-doped carbon dots; Fluorescence; Dual ion detection; Fluorescent test paper; Fluorescent hydrogel
资金
- National Natural Science Foundation of China [52072151, 52171211, 52271218]
- Jinan Independent Innovative Team [2020GXRC015]
- Science and Technology Program of University of Jinan [XKY2119]
- [ts201712050]
Developing water-soluble carbon dots (CDs) for ion detection in the environment is highly significant. In this study, boron, nitrogen co-doped organic molecule-derived CDs (BN-CDs) with water solubility were synthesized via a simple method. The BN-CDs showed bright tangerine fluorescence and a high fluorescent quantum yield. They also exhibited a good linear relationship with Cu2+/Co2+ and were used to fabricate instrument-free solid sensors for sensitive monitoring of both ions.
It is highly significant to develop water-soluble carbon dots (CDs) for ion detection in the environment via a facile and economical process. Herein, the organic molecules derived boron, nitrogen co-doped CDs (BN-CDs) with water-solubility are solvothermally synthesized towards dual ion detection. The BN-CDs emit bright tangerine fluorescence, and demonstrate a fluorescent quantum yield of 17 %. Besides, the obtained BN-CDs show a good linear relationship with Cu2+/Co2+ in a wide dynamic range of 1-8 mu M, along with detection limits of 16 nM (Cu2+) and 24 nM (Co2+). The joint effect of dynamic and static quenching mechanisms is proposed as well for fluorescence quenching by Cu2+/Co2+. Furthermore, two instrument-free BN-CDs-based solid sensors (i.e., test strips and hydrogel beads) are fabricated to sensitively monitor both Cu2+ and Co2+. The paper-based sensors exhibit selective and sensitive response towards Cu2+ and Co2+ in a low-cost manner. The fluorescence hydrogel integrates comprehensive advantages of hydrogel and BN-CDs, which makes it not only conduct as efficient fluorescent sensors to detect Cu2+ and Co2+ but act as the absorbent towards removal of the ions. The simple yet reliable sensing technique developed here favor efficiently detecting and recognizing dual ions in environmental and/or biological samples.
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