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Preparation method of manganese-based MOF (metal-organic framework) magnetic material

An organic framework and magnetic material technology, applied in the field of materials science, can solve the problems of low catalytic efficiency of catalysts, difficult to recycle, etc., and achieve the effects of difficult recycling, improved catalytic performance, and easy magnetic recycling.

Inactive Publication Date: 2016-06-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a manganese-based metal-organic framework magnetic material. The method for preparing the manganese-based metal-organic framework magnetic material solves the problem of Catalysts for environmental governance have low catalytic efficiency and technical problems that are not easy to recycle

Method used

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  • Preparation method of manganese-based MOF (metal-organic framework) magnetic material

Examples

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Embodiment 1

[0019] A method for preparing a manganese-based metal-organic framework magnetic material, specifically comprising the following steps:

[0020] (1) Dissolving 8-hydroxyquinoline in absolute ethanol to form a solution A with a concentration of 10mol / L;

[0021] (2) Dissolve the manganese salt in water to form a 5mol / L solution B, then add the above solution A to the solution B dropwise at a rate of 0.5mL / min, and reflux at 200°C for 2h after the dropwise addition;

[0022] The manganese salt is manganese chloride;

[0023] (3) Control the rotating speed to 5000r / min, centrifuge for 15min, wash the obtained precipitate and dry it. The obtained precipitate was washed 4 times with absolute ethanol and water successively, and then vacuum-dried at a temperature of 60° C. for 12 hours;

[0024] (4) The solid obtained after drying is heated up to 500° C. for 9 hours at a rate of 1° C. / min in a hydrogen atmosphere and calcined for 9 hours to obtain a manganese-based metal-organic fr...

Embodiment 2

[0035] A method for preparing a manganese-based metal-organic framework magnetic material, specifically comprising the following steps:

[0036] (1), 8-hydroxyquinoline was dissolved in absolute ethanol to form a solution A with a concentration of 20mol / L;

[0037] (2) Dissolve the manganese salt in water to form a 5mol / L solution B, then add the above solution A to the solution B dropwise at a rate of 5mL / min, and reflux at 100°C for 8h after the dropwise addition;

[0038] The manganese salt is manganese acetate;

[0039] (3) Control the rotating speed to 10000r / min, centrifuge for 5min, wash the obtained precipitate and dry it. The obtained precipitate was washed 4 times with absolute ethanol and water successively, and then vacuum-dried at a temperature of 60° C. for 12 hours;

[0040] (4) The solid obtained after drying is heated up to 900° C. for 3 hours at a rate of 1° C. / min in a hydrogen atmosphere and calcined for 3 hours to obtain a manganese-based metal-organic f...

Embodiment 3

[0042] A method for preparing a manganese-based metal-organic framework magnetic material, specifically comprising the following steps:

[0043] (1) Dissolving 8-hydroxyquinoline in absolute ethanol to form a solution A with a concentration of 10mol / L;

[0044] (2) Dissolve the manganese salt in water to form 8mol / L solution B, then add the above solution A to solution B dropwise at a rate of 3mL / min, and reflux at 180°C for 5h after the dropwise addition;

[0045] The manganese salt is manganese sulfate;

[0046] (3) Control the rotating speed to 8000r / min, centrifuge for 10min, wash the obtained precipitate and dry it. The obtained precipitate was successively washed with absolute ethanol and water for 5 times, and then vacuum-dried at a temperature of 60° C. for 12 hours;

[0047] (4) The solid obtained after drying is heated up to 500-900° C. for 3-9 hours at a rate of 1° C. / min in a hydrogen atmosphere to obtain a manganese-based metal-organic framework magnetic material....

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Abstract

The invention provides a preparation method of a manganese-based MOF (metal-organic framework) magnetic material. 8-hydroxyquinoline is dissolved in absolute ethyl alcohol, and a solution with the concentration being 10-20 mol / L is formed; manganese salt is dissolved in water, a solution B with the concentration being 5-10 mol / L is formed, then, the solution A is added to the solution B, and reflux is performed for 2-8 h; centrifugation is performed, and obtained precipitates are washed and then dried; the dried solids are heated to 500-900 DEG C at the speed of 0.5-1.5 DEG C / min in the hydrogen atmosphere and calcined for 3-9 h, and the manganese-based MOF magnetic material is obtained. The prepared composite catalytic material can be easily separated and recovered from a reaction system with a magnetic separation method, the reuse efficiency of a catalyst is improved, secondary pollution to the environment is reduced, and the catalytic performance of the MOF structure is greatly improved.

Description

technical field [0001] The invention belongs to the field of materials science and relates to a preparation method of a manganese-based metal organic framework magnetic material. Background technique [0002] With the development of science and technology and the progress of society, environmental problems are becoming more and more serious. Catalytic oxidation technology plays an increasingly important role in environmental governance, and catalytic engineering plays a pivotal role. Therefore, the development and performance research of new catalysts has always been a key research field. [0003] Metal-organic frameworks (MOFs) materials represent a class of hybrid organic-inorganic supramolecular materials, which are ordered network structures formed by the combination of organic bridging ligands and inorganic metal ions. MOFs present the highest specific surface area, the lowest crystal density, and adjustable pore size and functional structure, and exhibit excellent cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/12C02F1/72C02F101/38
CPCB01J31/1691C02F1/725C02F2101/38
Inventor 时鹏辉秦欣李军令范金辰闵宇霖姚伟峰徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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