Abstract
A triazine-based graphite carbon nitride (tri-C3N4) was successfully prepared using a solid and mild method, and modified through concentrated acid and the hydrothermal method. Interestingly, the modified tri-C3N4 (tri-HC3N4) showed good water stability and excellent fluorescence property. Meanwhile, tri-HC3N4 was successfully used to construct a high-sensitive and selective fluorescence sensor to Ag+. The as-prepared fluorescence sensor showed a fast response and a low detection limit as 0.4046 μM. Moreover, the possible quenching mechanisms were discussed based on the photoinduced electron transfer and the formation of new complex between tri-HC3N4 and Ag+ with the help of the related characterizations. This study does not only provide a new tri-HC3N4 for a high efficiency fluorescence sensor, but also show the potential application in biological sciences.
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Acknowledgment
This work was funded by the National Natural Science Foundation of China (No. 21874094) and Science & Technology Department of Sichuan Province of China (No. 2020YFS0073). The authors thank Lingzhu Yu (National Engineering Research Center for Biomaterials, Sichuan University) and Dr. Shuguang Yan (Analytical & Testing Center, Sichuan University) for their generous help in characterizing SEM and XPS, respectively. We also thank the State Key Laboratory of Oral Diseases at Sichuan University provided the cell experiment platform.
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Hao, L., Song, H. & Lv, Y. Modified triazine-based carbon nitride as a high efficiency fluorescence sensor for the label-free detection of Ag+. Journal of Materials Research 35, 3235–3246 (2020). https://doi.org/10.1557/jmr.2020.314
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DOI: https://doi.org/10.1557/jmr.2020.314