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Preparation method of aluminum ion doped and modified iron oxide catalyst with metal organic framework structure

A technology of metal-organic frameworks and iron oxides, applied in the direction of metal/metal oxide/metal hydroxide catalysts, organic compound/hydride/coordination complex catalysts, catalyst activation/preparation, etc., can solve the problem of small specific surface area , poor catalytic activity and other problems, to achieve the effect of promoting catalytic activity, increasing adsorption capacity, and increasing contact area

Pending Publication Date: 2021-03-30
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of current catalytic materials such as small specific surface area and poor catalytic activity, the purpose of the present invention is to provide a method for preparing an Al3+ doped modified iron oxide catalyst with a metal organic framework structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Al with a metal-organic framework structure 3+ Doping modified iron oxide catalysts, Al 3+ Adding MIL-53(Fe) to inhibit the decomposition of MIL-53(Fe) in water, from to enhance its stability in water; using H 2 / Ar atmosphere reduction treatment, while retaining the MIL-53(Fe) skeleton, produce part of the amorphous carbon, further increase the specific surface area of ​​the catalyst, provide more abundant catalytic active sites, and effectively increase the adsorption of pollutants on the catalyst surface. To promote the efficient catalytic degradation of organic pollutants in water, it is prepared according to the following steps:

[0027] (1) Under magnetic stirring, aluminum nitrate nonahydrate Al(NO 3 ) 3 9H 2 O and iron nitrate hexahydrate Fe(NO 3 ) 3 ·6H 2 O is added to the DMF solvent to dissolve, after the dissolution is complete, press Fe(NO 3 ) 3 ·6H 2 The molar ratio of O to terephthalic acid is 2:1, and the terephthalic acid solution is added dro...

Embodiment 2

[0032] Al with a metal-organic framework structure 3+ The iron oxide catalyst of doping modification, is similar to embodiment 1 step, is prepared according to the following steps:

[0033](1) First, under magnetic stirring, Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 ·6H 2 O is added to the DMF solvent to dissolve, after the dissolution is complete, press Fe(NO 3 ) 3 ·6H 2 The molar ratio of O and terephthalic acid is 2:1, the terephthalic acid solution is added dropwise in the mixed solution, and after ultrasonic treatment for 30min, the solution is transferred to a polytetrafluoroethylene reactor, and the reaction temperature and time are adjusted as follows: 150℃ and 12h;

[0034] (2) Next, cool down naturally after the reaction, and place the product in 5% H after centrifugation, washing, and drying. 2 Heat treatment in / Ar atmosphere, control the gas flow rate, reaction temperature and time to 50ml / min, 500°C and 2h respectively;

[0035] (3) After the reduction treatm...

Embodiment 3

[0038] Al with a metal-organic framework structure 3+ The iron oxide catalyst of doping modification, is similar to embodiment 1 step, is prepared according to the following steps:

[0039] (1) First, under magnetic stirring, Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 ·6H 2 O is added to the DMF solvent to dissolve, after the dissolution is complete, press Fe(NO 3 ) 3 ·6H 2 The molar ratio of O and terephthalic acid is 2:1, the terephthalic acid solution is added dropwise in the mixed solution, and after ultrasonic treatment for 30min, the solution is transferred to a polytetrafluoroethylene reactor, and the reaction temperature and time are adjusted as follows: 150℃ and 24h;

[0040] (2) Next, cool down naturally after the reaction, and place the product in 5% H after centrifugation, washing, and drying. 2 Heat treatment in / Ar atmosphere, control the gas flow rate, reaction temperature and time as 100ml / min, 500°C and 4h respectively;

[0041] (3) After the reduction trea...

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PUM

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Abstract

The invention relates to a preparation method of an Al < 3 + > doped and modified iron oxide catalyst with a metal organic framework structure, namely Al < 3 + > is added into MIL-53 (Fe) by adoptinga solvothermal method to inhibit the decomposition of the MIL-53 (Fe) in water so as to enhance the stability of the MIL-53 (Fe) in water. H2 / Ar atmosphere is used for reduction treatment, an MIL-53 (Fe) framework is reserved, meanwhile, part of amorphous carbon is generated, the specific surface area of the catalyst can be further increased, rich catalytic active sites are provided, the adsorption quantity of pollutants on the surface of the catalyst is effectively increased, and efficient catalytic degradation of organic pollutants in water is promoted. Besides, the catalyst has good magnetism, the problem of difficult recovery in practical application is effectively solved, efficient recycling of the powder catalyst is realized, and the catalyst has a great practical application prospect.

Description

technical field [0001] The invention relates to an aluminum ion (Al 3+ ) The preparation method of the doped modified iron oxide catalyst can effectively retain the metal-organic framework structure and large specific surface area of ​​the catalyst, improve the water stability and enhance the catalytic efficiency at the same time, and is used in the field of sewage treatment. Background technique [0002] Metal-organic frameworks (MOFs) are a type of microporous-mesoporous hybrid materials with a 3D network structure. They not only have the advantages of high specific surface area, low crystal density and adjustable pores, but are widely used in gas adsorption and Storage, molecular separation, catalysis and other fields. [0003] Since Fe is an environmentally friendly, inexpensive, and nontoxic metal, and Fe-based MOFs have large surface areas, they have attracted extensive attention in catalysis and adsorption. However, its stability is relatively poor, and it is easily...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J23/745B01J35/10B01J37/18C02F1/72C02F101/30C02F101/34
CPCB01J31/1691B01J31/2239B01J23/745B01J37/18C02F1/725C02F2101/30C02F2101/34C02F2305/023B01J35/33B01J35/61
Inventor 崔大祥童琴赵昆峰蔡婷袁静
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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