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Preparation method and application of metal ion modified MOF micro/nano structure in hydrogel

A metal ion modification and hydrogel technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of imperfect crystal form and large aggregate size, and improve the reliability Effects of recyclability and high-efficiency photocatalytic performance

Active Publication Date: 2021-10-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creating tiny structures calledporphylline molecules that have specific dimensions through chemical reactions or modifying certain materials with metals like iron atoms. These small structures can be used to make photo catalysis systems more effective at decomposating organic pollutants into less harmful products.

Problems solved by technology

This patented technical solution describes different ways to create small crystalline structures called metaphosphene or organoimino framework type compound (MIL). These structures contain carbon atoms connected through strong covalence bonds like hydrocarbon bondings, making them ideal for developing novel types of optoelectrocatalysites based on these structures. They offer potential benefits over traditional electrodes made of noble metals because they allow for effective oxidative decomposition without requiring expensive precious metals. Additionally, some reports demonstrate that certain transition elements found within this family may help promote biological activity while others could potentially harm other living things. Metal-orgacons containing lithium nitrocompounds were developed earlier than previously known ones, providing an alternative approach towards solving issues related to environmentally friendly chemistry.

Method used

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  • Preparation method and application of metal ion modified MOF micro/nano structure in hydrogel
  • Preparation method and application of metal ion modified MOF micro/nano structure in hydrogel
  • Preparation method and application of metal ion modified MOF micro/nano structure in hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The porphyrin used in this example is TCPP, provided by Beijing Bailingwei Technology Co., Ltd., without further treatment before use, and its structural formula is shown in formula 1:

[0031]

[0032] Concrete preparation steps are as follows:

[0033] 1) 0-20mg ZrCl 4 and 0-20 mg of TCPP were dissolved in 1-10 mL of DMF solution, and then 50-200 μL of acetic acid and 10-100 μL of deionized water were added.

[0034] 2) The mixed solution is magnetically stirred at room temperature for 5-30 minutes, then the solution is sealed and heated at 100-200°C. After reacting for 5-15 hours, centrifuge, dry and collect samples. figure 1 It can be seen that the size of porphyrin MOF is 100-800nm.

[0035] Performance Testing:

[0036] 1) Weigh 1-20mg of porphyrin MOF powder collected by traditional solvothermal reaction and add it to 10-100mL, 0.01-0.1mM MB solution. 100mW / cm 2 ) under irradiation for 100 minutes, samples were taken every 10 minutes and carried out the ...

Embodiment 2

[0038] 1) Configure Zn with excessive concentration 2+Salt solution 10-100ml, weigh 10-100mg of SA powder and add 1-10ml of deionized water. Weigh 1-10 mg of the porphyrin MOF powder obtained in Example 1, add 1-10 ml of water to prepare a MOF dispersion.

[0039] 2) Mix the SA aqueous solution in 1) and the porphyrin MOF dispersion, stir for 5-30 minutes, freeze and set, add the Zn in 1) 2+ saline solution, the resulting SA-M 2+ -MOF hydrogel spheres see figure 2 with image 3 .

[0040] Performance Testing:

[0041] 1) SA-M obtained by metal ion modification method 2+ -MOF hydrogel balls were added to 10-100mL, 0.01-0.1mM MB solution, and after the adsorption-desorption equilibrium was carried out under dark conditions, in simulated sunlight (illumination intensity 100mW / cm 2 ) under irradiation for 100 minutes, samples were taken every 10 minutes and carried out the UV-visible absorption spectrum test; for the sample test performance results prepared in embodiment 1...

Embodiment 3

[0043] Repeat embodiment 2, its difference is only that the metal ion in step 1) is Co 2+ .

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Abstract

The invention discloses a preparation method and application of a metal ion modified MOF micro/nano structure in hydrogel, and belongs to the field of organic nano photocatalysis. The preparation method comprises the following steps: reacting a porphyrin ligand with a metal cluster to obtain a porphyrin MOF micro/nano structure, then blending the porphyrin MOF micro/nano structure with a sodium alginate (SA) aqueous solution, freezing and forming, putting the mixture into an excessive amount of a divalent metal salt (M<2+>) solution, and carrying out cross-linking curing to obtain the SA-M<2+>-MOF hydrogel ball. According to the invention, by utilizing a method of coordination of cross-linked metal ions and porphyrin molecules, while an MOF micro/nano structure is effectively modified, the MOF micro/nano structure is uniformly and firmly embedded into an SA hydrogel ball skeleton, so that the recyclability of the SA hydrogel ball is improved; the method is simple and easy to implement, and an experimental basis is provided for controllable and integral assembly of organic nano materials; the application of the obtained SA-M<2+>-MOF in photocatalytic degradation of organic dye is researched, and the result shows that the structure has efficient photocatalytic activity; and possibility is provided for wide application to pollution treatment and energy exhaustion.

Description

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Claims

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Application Information

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Owner UNIV OF SCI & TECH BEIJING
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