Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>
Luminescent Ln-MOFs (Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF) were successfully synthesised through the solvothermal reaction of Tb(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O, Eu(NO<sub>3</sub>)<sub>3</sub>·6H<s...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/21/7355 |
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| author | Jie Yin Hongtao Chu Shili Qin Haiyan Qi Minggang Hu |
| author_facet | Jie Yin Hongtao Chu Shili Qin Haiyan Qi Minggang Hu |
| author_sort | Jie Yin |
| collection | DOAJ |
| description | Luminescent Ln-MOFs (Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF) were successfully synthesised through the solvothermal reaction of Tb(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O, Eu(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O, and the ligand pyromellitic acid. The product was characterised by X-ray diffraction (XRD), TG analysis, EM, X-ray photoelectron spectroscopy (XPS), and luminescence properties, and results show that the synthesised material Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF has a selective ratio-based fluorescence response to Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>. On the basis of the internal filtering effect, the fluorescence detection experiment shows that as the concentration of Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> increases, the intensity of the characteristic emission peak at 544 nm of Tb<sup>3+</sup> decreases, and the intensity of the characteristic emission peak at 653 nm of Eu<sup>3+</sup> increases in Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF. The fluorescence intensity ratio (I<sub>653</sub>/I<sub>544</sub>) has a good linear relationship with the target concentration. The detection linear range for Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> is 10–100 μM/L, and the detection limits are 2.71 × 10<sup>−7</sup> and 8.72 × 10<sup>−7</sup> M, respectively. Compared with the sensor material with a single fluorescence emission, the synthesised material has a higher anti-interference ability. The synthesised Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF can be used as a highly selective and recyclable sensing material for Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>. This material should be an excellent candidate for multifunctional sensors. |
| first_indexed | 2024-03-10T05:52:25Z |
| format | Article |
| id | doaj.art-e4d62909fc0d43beb134563a2889d5ad |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T05:52:25Z |
| publishDate | 2021-11-01 |
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| spelling | doaj.art-e4d62909fc0d43beb134563a2889d5ad2023-11-22T21:40:22ZengMDPI AGSensors1424-82202021-11-012121735510.3390/s21217355Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>Jie Yin0Hongtao Chu1Shili Qin2Haiyan Qi3Minggang Hu4College of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, ChinaCollege of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, ChinaCollege of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, ChinaCollege of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, ChinaCollege of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, ChinaLuminescent Ln-MOFs (Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF) were successfully synthesised through the solvothermal reaction of Tb(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O, Eu(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O, and the ligand pyromellitic acid. The product was characterised by X-ray diffraction (XRD), TG analysis, EM, X-ray photoelectron spectroscopy (XPS), and luminescence properties, and results show that the synthesised material Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF has a selective ratio-based fluorescence response to Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>. On the basis of the internal filtering effect, the fluorescence detection experiment shows that as the concentration of Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> increases, the intensity of the characteristic emission peak at 544 nm of Tb<sup>3+</sup> decreases, and the intensity of the characteristic emission peak at 653 nm of Eu<sup>3+</sup> increases in Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF. The fluorescence intensity ratio (I<sub>653</sub>/I<sub>544</sub>) has a good linear relationship with the target concentration. The detection linear range for Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> is 10–100 μM/L, and the detection limits are 2.71 × 10<sup>−7</sup> and 8.72 × 10<sup>−7</sup> M, respectively. Compared with the sensor material with a single fluorescence emission, the synthesised material has a higher anti-interference ability. The synthesised Eu<sub>0.075</sub>Tb<sub>0.925</sub>-MOF can be used as a highly selective and recyclable sensing material for Fe<sup>3+</sup> or Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>. This material should be an excellent candidate for multifunctional sensors.https://www.mdpi.com/1424-8220/21/21/7355Ln-MOFsluminous sensingFe<sup>3+</sup>Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| spellingShingle | Jie Yin Hongtao Chu Shili Qin Haiyan Qi Minggang Hu Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> Sensors Ln-MOFs luminous sensing Fe<sup>3+</sup> Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title | Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title_full | Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title_fullStr | Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title_full_unstemmed | Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title_short | Preparation of Eu<sub>0.075</sub>Tb<sub>0.925</sub>-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe<sup>3+</sup> and Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| title_sort | preparation of eu sub 0 075 sub tb sub 0 925 sub metal organic framework as a fluorescent probe and application in the detection of fe sup 3 sup and cr sub 2 sub o sub 7 sub sup 2 sup |
| topic | Ln-MOFs luminous sensing Fe<sup>3+</sup> Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> |
| url | https://www.mdpi.com/1424-8220/21/21/7355 |
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