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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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  • Summary
  • 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 surface and porosity are higher than those of activated carbon, zeolite molecular sieve, and silica. It is much higher, but the existing catalysts containing MOF-5 structure are very poor in stability, easy to decompose during the reaction process, and have poor recycling performance

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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

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preparation example Construction

[0015] A kind of preparation method of Cu-doped MOF-5 type catalyst, comprises the 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 react to obtain MOF-5 (Cu); then the MOF-5 (Cu) is calcined to obtain Cu-doped MOF-5 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 industrialized production.

[0019] Preferably, the preparation method of Cu-doped MOF-5 type catalyst of the present invention, comprises the steps:

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

Embodiment 1

[0038] This example provides a Cu-doped MOF-5 catalyst, 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) of 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 dissolve completely, then add 2.75mL of triethylamine into the mixed solution, Stir continuously and react for 2 hours to obtain a white solid, which is filtered with suction and washed with DMF 4 times during the suction filtration to remove unreacted inorganic salts and organic acids in the product. The samples were ground and loaded to obtain MOF-5(Cu)1%Cu(mass fraction).

[0040] The second step: put MOF-5(Cu) 1% Cu in a tube furnace, and heat up to 600°C for 2 hours at a heating rate of 10°C / min in an air atmosphere to obtain MOF-5(Cu)-D 1% Cu catalyst.

[0041] Step 3: Weigh 0.05g of MOF-5(Cu)-D 1% Cu catalyst,...

Embodiment 2

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

[0047] The first step: weigh 0.0051mol (1.52g) of Zn(NO 3 ) 2 ·6H 2 O and 1.62×10 -4 mol(0.0304g) of 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 dissolve completely, then add 2.75mL of triethylamine into the mixed solution, Stir continuously and react for 2 hours to obtain a white solid, which is filtered with suction and washed with DMF 4 times during the suction filtration to remove unreacted inorganic salts and organic acids in the product. The sample was ground and loaded to obtain MOF-5(Cu) 3%Cu.

[0048] The second step: put MOF-5(Cu) 3% Cu in a tube furnace, and heat up to 600°C for 2 hours at a heating rate of 10°C / min in an air atmosphere to obtain MOF-5(Cu)-D 3% Cu catalyst.

[0049] Step 3: Weigh 0.05g of MOF-5(Cu)-D 3% Cu catalyst, weigh 0.88mL o...

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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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