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Water-stable microporous difunctional MOFs material as well as preparation method and application thereof

A water-stable, dual-function technology, applied in analytical materials, material excitation analysis, chemical instruments and methods, etc., can solve problems such as difficult solvent degradation, secondary environmental pollution, poor stability, etc., to enhance adsorption performance, fluorescence performance. The effect of good, good water stability

Active Publication Date: 2022-01-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvothermal method will involve the use of some high-boiling organic solvents, such as DMF, DMA, DME, etc. These solvents themselves are difficult to degrade, and the synthesis process will not only cause secondary pollution to the environment
Moreover, these materials often have poor stability in water, which limits their use in water quality environments. For example, MOF-5, which is widely cited in the literature, has objectively limited its use in sewage due to its poor stability in water. Applications in progress

Method used

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  • Water-stable microporous difunctional MOFs material as well as preparation method and application thereof
  • Water-stable microporous difunctional MOFs material as well as preparation method and application thereof
  • Water-stable microporous difunctional MOFs material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Accurately weigh H 6 OBTEC 13.5mg (0.05mmol), then add to a 10mL glass bottle (sample bottle); then add 5mL deionized water and 1mol / L diethylamine solution 175uL (0.175mmol), sonicate until the organic ligand is completely dissolved , then add 1mol / L of Zn(NO 3 ) 2 ·6H 2 O 0.15mmol, sonicate again to mix evenly. Finally, put the sample bottle into a steel kettle lined with 25mL polytetrafluoroethylene, keep the steel kettle in an oven at 120°C for 96 hours, cool down to room temperature for 24 hours, wash the product three times with deionized water, and air-dry , obtain colorless transparent crystal, productive rate is about 65% (with H 6 OBTEC calculation).

Embodiment 2

[0034] Embodiment 2: The reaction temperature is changed from 120° C. in Embodiment 1 to 110° C.

[0035] Accurately weigh H 6 OBTEC 13.5mg (0.05mmol), then add to a 10mL glass bottle (sample bottle); then add 5mL deionized water and 1mol / L diethylamine solution 175uL (0.175mmol), sonicate until the organic ligand is completely dissolved , then add 1mol / L of Zn(NO 3 ) 2 ·6H 2 O 0.15mmol, sonicate again to mix evenly. Finally, put the sample bottle into a steel kettle lined with 25mL polytetrafluoroethylene, keep the steel kettle in an oven at 110°C for 96 hours, cool down to room temperature for 24 hours, wash the product three times with deionized water, and air-dry , to obtain colorless transparent crystals, but compared to Example 1, the yield of Example 2 is about 60%.

Embodiment 3

[0036] Embodiment 3: The reaction temperature is changed from 120° C. in Embodiment 1 to 100° C.

[0037] Accurately weigh H 6 OBTEC 13.5mg (0.05mmol), then add to a 10mL glass bottle (sample bottle); then add 5mL deionized water and 1mol / L diethylamine solution 175uL (0.175mmol), sonicate until the organic ligand is completely dissolved , then add 1mol / L of Zn(NO 3 ) 2 ·6H 2 O 0.15mmol, sonicate again to mix evenly. Finally, put the sample bottle into a steel kettle lined with 25mL polytetrafluoroethylene, keep the steel kettle in an oven at 100°C for 96 hours, cool down to room temperature for 24 hours, wash the product three times with deionized water, and air-dry , Obtain a small amount of colorless transparent crystals, compared with Example 2, there are less white flocculent impurities in Example 3.

[0038] figure 1 It is the coordination environment diagram of the sample prepared in the present invention. There are four crystallographically independent Zn(II), a...

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Abstract

The invention discloses a microporous water-stable MOF material [Zn6(OBTEC)2(H2O)6].8H2O taking a 3-hydroxy-1, 2, 4, 5-benzene tetracarboxylic acid ligand as a substrate. Because of a special coordination environment of the 3-hydroxy-1, 2, 4, 5-benzene tetracarboxylic acid ligand and metal Zn<2+>, a water-stable MOFs dye adsorbent with a good pore diameter and good selective adsorption is constructed. The adsorbent is synthesized through a hydrothermal method and can keep good stability in water, no organic solvent is used in the synthesis process, and the environment is not polluted. Adsorption performance tests show that the adsorbent has good adsorption performance on methylene blue and methyl orange, has poor adsorption performance on rhodamine B and crystal violet, and shows certain selective adsorption performance. In addition, the material has best detection capability on Al<3+> and Co<2+> and can be used as metal ion detection probes.

Description

technical field [0001] The invention belongs to the technical field of preparation of multifunctional MOFs materials, in particular to a 3-hydroxyl-1,2,4,5-benzenetetracarboxylic acid ligand (H 6 OBTEC) as the substrate microporous water-stable MOF material, [Zn 6 (OBTEC) 2 (H 2 O) 6 ]·8H 2 O, and methods for its preparation and use as dye adsorbents or metal ion probes. Background technique [0002] With the rapid development of human textile, leather, papermaking, printing and dyeing, plastics, smelting, electroplating and other industries, the pollution of water resources is also increasing day by day, and the pollutant components of the sewage quality are also more complex, among which are organic dyes and heavy metal ions. pollution is the most serious. Most organic dye molecules and heavy metal ions are highly toxic and carcinogenic. The excess of metal ions, especially heavy metal ions, poses a serious threat to the survival of organisms in water bodies. When ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C02F1/28G01N21/64C02F101/30
CPCC08G83/008C02F1/285G01N21/6428C02F2101/308G01N2021/6432
Inventor 殷秀莲夏昌坤杨斌一潘镜伊李扬周兴华
Owner JIANGSU UNIV
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