One-step synthesized fluorescent nitrogen doped carbon dots from thymidine for Cr (VI) detection in water
| Autor: | Jiawei Li, Jingzhou Hou, Qiang He, Mei Yang, Xianfeng Wang, Danqun Huo, Changjun Hou, Fanglin Ming |
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| Rok vydání: | 2019 |
| Předmět: |
Chromium
Nitrogen Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Analytical Chemistry X-ray photoelectron spectroscopy Limit of Detection Quantum Dots Fourier transform infrared spectroscopy Instrumentation Inductively coupled plasma mass spectrometry Spectroscopy Fluorescent Dyes Detection limit Reproducibility of Results Water Repeatability 021001 nanoscience & nanotechnology Fluorescence Carbon Atomic and Molecular Physics and Optics 0104 chemical sciences Spectrometry Fluorescence chemistry Transmission electron microscopy 0210 nano-technology Water Pollutants Chemical Thymidine |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 222:117165 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2019.117165 |
| Popis: | A novel, simple and low-cost nitrogen doped carbon dots (N-CDs) fluorescent sensor for sensitive detection of Cr (VI) was developed via one-step hydrothermal method using thymidine as carbon source. As-prepared N-CDs exhibited the ability of sensitive and selective detection of Cr (VI) through the inner filter effect (IFE). The performances of N-CDs were investigated with the characterization methods of transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Under the optimized conditions, a good logarithm correlation between the fluorescence intensity of N-CDS and the concentration of Cr (VI) was obtained ranging from 0.1 μM to 430 μM (R2 = 0.992), with a low detection limit (LOD; S/N = 3) of 1.26 nM. The fluorescent sensor showed good repeatability, reproducibility and stability. Furthermore, N-CDs fluorescent sensor had a good applicability for Cr (VI) detection in real water samples with acceptable recoveries, and the detection results were consistent with the inductively coupled plasma mass spectrometry (ICP-MS) results, indicating this fluorescent sensor has a great potential for the environmental monitoring. |
| Databáze: | OpenAIRE |
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