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Magnetic catalyst MnFe2O4-MIL-53(Al) composite as well as preparation method and application thereof

A magnetic composite material, MIL-53 technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., to achieve simple and efficient preparation methods, high activation performance, overcome The effect of catalytic efficiency reduction

Active Publication Date: 2018-06-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through reliable investigation, it is determined that manganese nitrate, ferric nitrate and MIL-53 (Al) are not used as raw materials to prepare catalyst MnFe by sol-gel method. 2 o 4 -Patent applications and literature reports on the method of MIL-53(Al) composite materials, and MnFe 2 o 4 Composite with MIL-53(Al) two monomers requires unique reaction conditions to achieve, which has become a technical problem to be solved

Method used

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  • Magnetic catalyst MnFe2O4-MIL-53(Al) composite as well as preparation method and application thereof
  • Magnetic catalyst MnFe2O4-MIL-53(Al) composite as well as preparation method and application thereof
  • Magnetic catalyst MnFe2O4-MIL-53(Al) composite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, a catalyst MnFe 2 o 4 -The preparation method of MIL-53 (Al) magnetic composite material, the steps are as follows:

[0037] (1) Weigh 0.07mol of Al(NO 3 ) 3 9H 2 O, 0.035mol of terephthalic acid (H 2 BDC), Al(NO 3 ) 3 9H 2 O and H 2 BDC was dissolved in 100mL of distilled water, treated with ultrasonic dispersion for 30min, uniformly mixed and fully dissolved to obtain a precursor mixture, and then the precursor mixture was transferred to an autoclave by solvothermal method, and then the autoclave was put into temperature In an oven at 220°C, the reaction was carried out for 72 hours. After the reaction product was cooled to room temperature, it was centrifuged, washed twice with twice distilled water and washed once with absolute ethanol to obtain a pure reaction product, and then placed in an oven at a temperature of 80°C. In an oven, the reaction product was vacuum-dried for 10 hours to obtain the product MIL-53(Al), which was used as a car...

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, especially in that:

[0048] In this example, a catalyst MnFe 2 o 4 -The preparation method of MIL-53 (Al) magnetic composite material, the steps are as follows:

[0049] (1) This step is identical with embodiment one;

[0050] (2) This step is identical with embodiment one;

[0051] (3) This step is identical with embodiment one;

[0052] (4) This step is identical with embodiment one;

[0053] (5) Using sol-gel method, according to MnFe 2 o 4 And the mol ratio of MIL-53 (Al) is the ratio of 2:1, to the MnFe prepared in above-mentioned steps (4) 2 o 4 Add 0.57g of MIL-53(Al) to the precursor solution, continue magnetic stirring in a water bath at 90°C until a gel is obtained after 4 hours, then transfer the gel to an oven at a temperature of 120°C for drying 10 hours, obtain xerogel;

[0054] (6) This step is the same as in Embodiment 1.

[0055] The novel MnFe that present embodiment prepares 2 o 4 -M...

Embodiment 3

[0057] This embodiment is basically the same as the previous embodiment, and the special features are:

[0058] In this example, a catalyst MnFe 2 o 4 -The preparation method of MIL-53 (Al) magnetic composite material, the steps are as follows:

[0059] (1) This step is identical with embodiment one;

[0060] (2) This step is identical with embodiment one;

[0061] (3) This step is identical with embodiment one;

[0062] (4) This step is identical with embodiment one;

[0063] (5) Using sol-gel method, according to MnFe 2 o 4 And the mol ratio of MIL-53 (Al) is the ratio of 0.5:1, to the MnFe prepared in above-mentioned steps (4) 2 o 4 Add 2.26g of MIL-53(Al) to the precursor solution, continue magnetic stirring in a water bath at 90°C until a gel is obtained after 4 hours, then transfer the gel to an oven at 120°C for drying 10 hours, obtain xerogel;

[0064] (6) This step is the same as in Embodiment 1.

[0065] The novel MnFe that present embodiment prepares 2 o...

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Abstract

The invention discloses a magnetic catalyst MnFe2O4-MIL-53(Al) composite as well as a preparation method and an application thereof. A prepared MOF (metal organic framework material) MIL-53(Al) is added to a metal salt precursor for synthesizing MnFe2O4, and the catalyst MnFe2O4-MIL-53(Al) composite is prepared with a sol-gel method. The prepared supported MnFe2O4-MIL-53(Al) composite has bulk morphology and nanoparticles MnFe2O4 uniformly distributed on MIL-53(Al). The catalyst MnFe2O4-MIL-53(Al) composite has excellent catalytic degradation capacity for refractory organic matters in the presence of PMS, has the degradation rate for rhodamine B up to 99% and is convenient to prepare and easy to recycle.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and application, in particular to a supported catalyst MnFe 2 o 4 Composite material, its preparation method and application, especially a composite material of metal-organic framework material MIL-53(Al) supported catalyst, its preparation method and application, and also relates to a kind of refractory organic pollutant Rodan degraded in water The method of Ming B is applied to the technical field of catalytic materials. Background technique [0002] Advanced oxidation technology has received high attention in the environmental field because it can efficiently solve some water pollution control problems. Based on the sulfate radical (SO 4 - ) advanced oxidation technology has great advantages, compared with OH radicals, SO 4 - Free radicals have higher redox potential and longer half-life under neutral conditions, so they can react more effectively with target organic pollutants, degra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/32C02F1/72
CPCC02F1/722C02F1/725B01J31/32C02F2305/023B01J35/33
Inventor 胡龙兴张雨瑶陆文聪胡海明
Owner SHANGHAI UNIV
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