Highly Sensitive and Selective Fluorescence “Turn-On” Detection of Pb (II) Based on Fe3O4@Au–FITC Nanocomposite
Abstract
:1. Introduction
2. Results
2.1. Characterization of NPs
2.2. Etching of Fe3O4@AuNPs–FITC by Lead and Thiosulfate Ions
2.3. Optimization of the Fluorescent Assay
2.4. Selectivity of Pb2+ Sensing
2.5. Analytical Performance of Pb2+ Sensing
2.6. Application of Pb2+ Sensing
3. Materials and Methods
3.1. Chemicals and Reagents
3.2. Apparatus
3.3. Synthesis of Au Nanoparticles (AuNPs)
3.4. Amine-Functionalization of Fe3O4 Nanoparticles Using APTES
3.5. Synthesis of Fe3O4@AuNCs-FITC
3.6. Fluorescent Detection of Pb2+
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Nanoprobes | Linear Range | LOD | Time | Ref. |
---|---|---|---|---|
CTAB modified AuNPs | 1.0~6.0 µmol/L | 75 nmol/L | 30 min | [25] |
AuNPs and graphene oxide | 0.1~20 µmol/L | 50 nmol/L | 20 min | [27] |
AuNPs | 0.0025~10 µmol/L | 0.5 nmol/L | 2 h | [26] |
Fe3O4@Au–FITC | 0.02~2.0 µmol/L | 5.2 nmol/L | 12 min | This work |
Concentration (nmol/L) | Result (nmol/L) | Recovery (%) | RSD (%) |
---|---|---|---|
50 | 53.2 | 106.4 | 8.3 |
100 | 98.3 | 98.3 | 2.5 |
150 | 159.0 | 106.0 | 3.7 |
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Cai, Y.; Ren, B.; Peng, C.; Zhang, C.; Wei, X. Highly Sensitive and Selective Fluorescence “Turn-On” Detection of Pb (II) Based on Fe3O4@Au–FITC Nanocomposite. Molecules 2021, 26, 3180. https://doi.org/10.3390/molecules26113180
Cai Y, Ren B, Peng C, Zhang C, Wei X. Highly Sensitive and Selective Fluorescence “Turn-On” Detection of Pb (II) Based on Fe3O4@Au–FITC Nanocomposite. Molecules. 2021; 26(11):3180. https://doi.org/10.3390/molecules26113180
Chicago/Turabian StyleCai, Yina, Binxue Ren, Chifang Peng, Cunzheng Zhang, and Xinlin Wei. 2021. "Highly Sensitive and Selective Fluorescence “Turn-On” Detection of Pb (II) Based on Fe3O4@Au–FITC Nanocomposite" Molecules 26, no. 11: 3180. https://doi.org/10.3390/molecules26113180