Dual-mode detection sensor based on nitrogen-doped carbon dots from pine needles for the determination of Fe3+ and folic acid
Abstract
In this study, nitrogen-doped carbon dots (N-CDs) from pine needles were obtained by one-step hydrothermal synthesis without any chemical reagents. The fluorescence quenching and absorbance enhancement of N-CDs occurred when Fe3+ and folic acid (FA) were added. Based on this, the dual-mode detection sensor by fluorescence and ultraviolet-visible (UV-Vis) spectrophotometry for the determination of Fe3+ and FA was established. Detected by the dual-mode detection sensor under the optimized condition, the linear range of Fe3+ was 0.1-540 μM and FA was 0.1-165 μM. At the same time, the two inputs "NOR" and "OR" logic gates are constructed successfully according to the dual-mode sensor signals. The proposed dual-mode detection sensor is simple, efficient and stable; it can be applied to determinate Fe3+ and FA in practical samples successfully and the results are satisfactory.
- Publication:
-
Spectrochimica Acta Part A: Molecular Spectroscopy
- Pub Date:
- January 2023
- DOI:
- 10.1016/j.saa.2022.121891
- Bibcode:
- 2023AcSpA.28521891W
- Keywords:
-
- Nitrogen-doped carbon dots (N-CDs);
- Dual-mode detection sensor;
- Folic acid (FA);
- Fe<SUP>3+</SUP>