Preparation method and application of partially sulfurized metal-organic framework composite material

A metal-organic framework and composite material technology, which is applied to the preparation of partially sulfided metal-organic framework composite materials and its application fields, can solve the problems of high price, low reserves, and restrict wide application, and achieves low equipment requirements, simple process, and distribution. uniform effect

Inactive Publication Date: 2017-11-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology involves creating specialized metallorganics called mesopores that are tiny holes or cavities within an insulating matrix made from polymers containing carbon atoms (C). These small spaces allow certain molecules like oxygen gas or lithium ion to pass through while preventing other substances such as gases or liquids from entering it's interior space. By doing this they form catalyst systems for redox processes on their own.

Problems solved by technology

This patented technical problem addressed in this patent relates to finding an efficient method for producing highly pure hydroxyl radical (OH) without generating unwanted side products like nitrous acid that can be used as starting materials during manufacturing processes. Current treatment options involve expensive equipment with poor performance, leading to increased costs associated with disposal after usage. Additionally, current techniques require complicated steps involving multiple stages of purification and separation, increasing complexity and cost.

Method used

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  • Preparation method and application of partially sulfurized metal-organic framework composite material
  • Preparation method and application of partially sulfurized metal-organic framework composite material
  • Preparation method and application of partially sulfurized metal-organic framework composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 (precursor Cu-MOFs preparation)

[0043] (1) Dissolve 20mg of copper nitrate, 10mg of tetracarboxylic acid organic ligand in 2mL of DMF (N,N-dimethylformamide), 1mL of 1,4 dioxane, and 1mL of deionized water. The solution was sonicated at room temperature for 30 min to obtain mixed liquid A.

[0044] (2) Put the above mixed liquid A in a 20 ml glass vial, then place it in a constant temperature drying oven at 80°C for 12 hours, then transfer it to a constant temperature drying oven at 60°C for 23 hours, and cool it down to room temperature naturally to obtain White powder crystals, washed three times with absolute ethanol to obtain product B as a mixed liquid.

[0045] (3) Soak the mixed liquid B obtained after the above centrifugation in ethanol for 3 days, replace the ethanol solution every 12 hours, and dry it in a vacuum oven at 60°C for 24 hours after 3 days to obtain activated Cu-MOFs samples, Cu-MOFs samples The comparison chart of X-ray diffraction p...

Embodiment 2

[0046] Example 2 (preparation of vulcanized 10% metal-organic framework composite material)

[0047] The ethanol solutions of 50 mg of Cu-MOFs material obtained in Example 1 and 75 mg of thioacetamide were left to stand at 20° C. for two hours respectively. After the mixed liquid product obtained above is filtered, it is washed three times with distilled water and absolute ethanol in sequence, and the obtained product is vacuum-dried at 20 ° C ~ 100 ° C for 4-6 hours to obtain a metal-organic framework with 10% vulcanization Composite material B.

[0048] The CuS@Cu-MOFs samples prepared above were analyzed by XRD, and the results are shown in figure 1 of 20°C by figure 1 It can be seen that all diffraction peaks (002), (004), (100), (101), (102), (103), (006), (104) (105), (106), (008), (107 ), (110), (112), (108), (114), (0010), (201), (202), (109), (203), (116), (204), (205), (1010) (206), (118), (0012), (1011), (207), (208), (1012) (1011) (210), (211), (212), (209), ( ...

Embodiment 3

[0054] Example 3 (preparation of vulcanized 50% metal-organic framework composite material)

[0055] The ethanol solutions of 50 mg of Cu-MOFs material obtained in Example 1 and 75 mg of thioacetamide were left to stand at 80° C. for two hours respectively. After the mixed liquid product obtained above is filtered, it is washed three times with distilled water and absolute ethanol in sequence, and the obtained product is vacuum-dried at 20°C ~ 100°C for 4-6 hours to obtain a metal-organic framework with 50% vulcanization Composite material C.

[0056] The CuS@Cu-MOFs samples prepared above were analyzed by XRD, and the results are shown in figure 1 of 80°C by figure 1 It can be seen that all diffraction peaks (002), (004), (100), (101), (102), (103), (006), (104) (105), (106), (008), (107 ), (110), (112), (108), (114), (0010), (201), (202), (109), (203), (116), (204), (205), (1010) (206), (118), (0012), (1011), (207), (208), (1012) (1011) (210), (211), (212), (209), ( 213...

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Abstract

The invention discloses a partially sulfurized metal-organic framework composite material. The composite material is an adsorbent for selectively removing alkaline dyes from wastewater, and a non-noble metal hydrogen evolution catalyst. A synthesis method of the composite material concretely comprises the following steps: self-assembling a tetracarboxylic acid organic ligand and copper nitrate in an N,N-dimethylformamide, 1,4-dioxane and water mixed solution to obtain a porous metal-organic framework material, and carrying out an in-situ sulfurizing process on the synthesized metal-organic framework material and an ethanol solution of thioacetamide at different temperatures to obtain Cu-MOF having different sulfurization degrees and having a hierarchical porous structure and CuS nano-particles having uniform distribution, uniform size and a diameter of 20-30 nm. A result obtained after comparing the adsorption performance of the unsulfurized metal-organic framework compound with the adsorption performance of the sulfurized metal-organic framework compound shows that the sulfurized compound has good selective adsorptivity to organic mixed dyes. Additionally, the composite material contains a large number of active sites, and has a very good conductivity, so the composite material becomes a good hydrogen evolution catalyst.

Description

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Claims

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Application Information

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Owner CHINA THREE GORGES UNIV
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