Cu-doped MOF-5 catalyst, preparation method and application thereof

A technology of MOF-5 and catalyst, which is applied in the field of Cu-doped MOF-5 catalyst and its preparation, can solve the problems of poor recycling performance, easy decomposition, poor catalyst stability, etc., and achieve the effect of facilitating industrial production and simple process

Inactive Publication Date: 2020-03-17
HUAIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MOF-5 is a typical representative of the family of metal-organic framework complexes, which is formed by four Zn and one O [Zn 4 O] inorganic group, this group is connected with p-xylylene to form a three-dimensional, high specific surface and regular pore structure, and its specific

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  • Cu-doped MOF-5 catalyst, preparation method and application thereof
  • Cu-doped MOF-5 catalyst, preparation method and application thereof
  • Cu-doped MOF-5 catalyst, preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0015] A preparation method of Cu-doped MOF-5 catalyst includes the following steps:

[0016] Mix zinc salt, copper salt, solvent, terephthalic acid and catalyst, and react to obtain MOF-5(Cu);

[0017] The MOF-5 (Cu) is calcined.

[0018] In the present invention, zinc salt, copper salt, solvent, terephthalic acid and catalyst are mixed to obtain MOF-5 (Cu) by reaction; then the MOF-5 (Cu) is calcined to obtain Cu doped MOF-5 type catalyst. By doping copper into the structure of MOF-5, the catalytic active sites are firmly combined with MOF-5, and a Cu-doped MOF-5 catalyst with very good stability can be obtained. The preparation method has simple process and is beneficial to industrial production.

[0019] Preferably, the method for preparing the Cu-doped MOF-5 catalyst of the present invention includes the following steps:

[0020] (1) At room temperature, mix the zinc salt, copper salt, solvent 1 and terephthalic acid, stir constantly, wait for the solid to completely dissolve, a...

Example Embodiment

[0037] Example 1

[0038] This embodiment provides a Cu doped MOF-5 type catalyst and its preparation method and application.

[0039] The first step: Weigh 0.0051mol (1.52g) of Zn(NO 3 ) 2 ·6H 2 O and 8.1×10 -5 mol(0.0152g) Cu(NO 3 ) 2 ·3H 2 O, mix with 50mL of DMF, add 0.0038mol (0.6375g) of terephthalic acid to the system at room temperature, keep stirring, wait for the solid to completely dissolve, then add 2.75mL of triethylamine to the mixed solution, Stir continuously and react for 2 hours to obtain a white solid. Filter with suction. Wash with DMF 4 times during suction to remove unreacted inorganic salts and organic acids in the product. Finally, put the sample in an oven at 65℃ and dry it for 5 hours. Grind the sample to obtain MOF-5 (Cu) 1% Cu (mass fraction).

[0040] Step 2: Put MOF-5(Cu) 1% Cu in a tube furnace, and calcine at a constant temperature of 600°C for 2h at a heating rate of 10°C / min in an air atmosphere to obtain MOF-5(Cu)-D 1% Cu catalyst.

[0041] The thi...

Example Embodiment

[0045] Example 2

[0046] This embodiment provides a Cu doped MOF-5 type catalyst and its preparation method and application.

[0047] The first step: weigh out 0.0051mol (1.52g) of Zn(NO 3 ) 2 ·6H 2 O and 1.62×10 -4 mol(0.0304g) Cu(NO 3 ) 2 ·3H 2 O, mix with 50mL of DMF, add 0.0038mol (0.6375g) of terephthalic acid to the system at room temperature, keep stirring, wait for the solid to completely dissolve, then add 2.75mL of triethylamine to the mixed solution, Stir continuously and react for 2 hours to obtain a white solid. Filter with suction. Wash with DMF 4 times during suction to remove unreacted inorganic salts and organic acids in the product. Finally, put the sample in an oven at 65℃ and dry it for 5 hours. Grind the sample to obtain MOF-5 (Cu) 3% Cu.

[0048] Step 2: Put MOF-5(Cu) 3% Cu in a tube furnace, and calcine at a constant temperature of 600°C for 2h at a heating rate of 10°C / min in an air atmosphere to obtain MOF-5(Cu)-D 3% Cu catalyst.

[0049] The third step: We...

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Abstract

The invention relates to a Cu-doped MOF-5 catalyst and a preparation method and application thereof. The preparation method includes the following steps: mixing zinc salt, copper salt, a solvent, terephthalic acid and a catalyst and reacting to obtain MOF-5(Cu); and then calcining the MOF-5(Cu) to obtain the Cu-doped MOF-5 catalyst. By doping the MOF-5 with copper, catalytic active sites are combined with the MOF-5 firmly, and the Cu-doped MOF-5 catalyst with excellent stability can be obtained. The preparation method has a simple process and is beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a Cu-doped MOF-5 catalyst and its preparation method and application. Background technique [0002] Hydroquinone mainly includes catechol and hydroquinone, which are important organic intermediates and are used in the synthesis of carbofuran (carbofuran), propoxur, berberine, adrenaline, vanillin, piperonal, etc. It can also be used in dyes, photosensitive materials, electroplating materials, special inks, additives, etc. The process of directly oxidizing phenol with hydrogen peroxide to produce hydroquinone is simple, the reaction conditions are warm, the oxidation by-product is water, and there is no pollution to the environment. It is a green production process. The key to the hydroxylation of phenol hydrogen peroxide is to select a suitable catalyst and improve the catalytic activity. Currently, the catalysts used to catalyze the hydroxylation of phenol include modified mo...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07C37/60C07C39/08
CPCB01J31/1691B01J31/2239B01J2231/70C07C37/60C07C39/08
Inventor 向柏霖欧阳跃军陈桂陈雅王飘
Owner HUAIHUA UNIV
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