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Iron-containing chelating agent embedded MOF material as well as synthesis method and application thereof

A synthesis method and technology of iron chelating agent are applied in the field of MOF materials embedded with iron chelating agent, and achieve the effects of simple material, strong adsorption and desorption performance, and simple synthesis method

Active Publication Date: 2021-02-23
TIBET UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption performance of MOF materials for gases by embedding chelating agents has not been reported yet.

Method used

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  • Iron-containing chelating agent embedded MOF material as well as synthesis method and application thereof
  • Iron-containing chelating agent embedded MOF material as well as synthesis method and application thereof
  • Iron-containing chelating agent embedded MOF material as well as synthesis method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention provides a kind of synthetic method of the MOF material embedded with iron chelating agent, comprises the following steps:

[0036] (1) Synthesis of MOF materials

[0037] ①, configuration volume fraction is 25% tetramethylammonium hydroxide aqueous solution;

[0038] ②. Add 1.8g of terephthalic acid into 30ml of the aqueous solution prepared in step ①, and stir at room temperature for 25 minutes;

[0039] 3. Add 4.5 g of chromium nitrate to the stirred solution in step 2. Continue to stir at room temperature for 15 min;

[0040] ④. Transfer the stirred solution in step ③ to a 100ml autoclave lined with polytetrafluoroethylene, heat at 180°C for 24 hours, then cool to room temperature, centrifuge the obtained powder and wash the centrifuge repeatedly, and use deionized Washed with water several times, dried to obtain a light green powder;

[0041] ⑤. Place the light green powder obtained in step ④ in a perfluorosulfonic acid exchange membrane, soak it i...

Embodiment 2

[0051] The invention provides a kind of synthetic method of the MOF material embedded with iron chelating agent, comprises the following steps:

[0052] (1) Synthesis of MOF materials

[0053] ①, configuration volume fraction is 30% tetramethylammonium hydroxide aqueous solution;

[0054] ②. Add 2.0g of terephthalic acid into 40ml of the aqueous solution prepared in step ①, and stir at room temperature for 30 minutes;

[0055] ③. Add 5.0 g of chromium nitrate to the stirred solution in step ②, and continue stirring at room temperature for 20 min;

[0056] ④. Transfer the stirred solution in step ③ to a 100ml autoclave lined with polytetrafluoroethylene, heat at 190°C for 36 hours, then cool to room temperature, centrifuge the obtained powder and wash the centrifuge repeatedly, and use a deionized Washed with water several times, dried to obtain a light green powder;

[0057] ⑤. Place the light green powder obtained in step ④ in a perfluorosulfonic acid exchange membrane, so...

Embodiment 3

[0067] The invention provides a kind of synthetic method of the MOF material embedded with iron chelating agent, comprises the following steps:

[0068] (1) Synthesis of MOF materials

[0069] ①, configuration volume ratio is 35% tetramethylammonium hydroxide aqueous solution;

[0070] ②. Add 2.2g of terephthalic acid into 50ml of the aqueous solution prepared in step ①, and stir at room temperature for 35min;

[0071] 3. Add 5.5 g of chromium nitrate to the stirred solution in step 2. Continue stirring at room temperature for 25 min;

[0072] ④. Transfer the stirred solution in step ③ to a 100ml autoclave lined with polytetrafluoroethylene, heat at 200°C for 48 hours, then cool to room temperature, centrifuge the obtained powder and wash the centrifuge repeatedly, and use deionized Washed with water several times to obtain light green powder;

[0073] ⑤. Place the light green powder obtained in step ④ in a perfluorosulfonic acid exchange membrane, soak it in methanol solut...

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Abstract

The invention discloses an iron-containing chelating agent embedded MOF material, a synthesis method and application, the synthesis method comprises the steps of synthesizing the MOF material and synthesizing the iron-containing chelating agent embedded MOF material by taking the MOF material and ethylenediamine tetraacetic acid chelated iron as raw materials, encapsulating the ethylenediamine tetraacetic acid chelated iron in internal gaps of the MOF material to obtain the iron-containing chelating agent embedded MOF material. The adsorption performance of the MOF material is greatly improvedby utilizing a large number of chemical bonds easy for oxygen binding in ethylenediamine tetraacetic acid and the affinity of Fe element to oxygen, and the adsorbed material can be subjected to thermal desorption, so that the reutilization of the material is realized.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a MOF material embedded with an iron-containing chelating agent, a synthesis method and an application. Background technique [0002] Oxygen is widely used in the production of various commodity materials and chemicals. The current process technology is mainly to produce pure oxygen from air by cryogenic distillation. The energy demand is large, and the economy is not good. Therefore, there is an urgent need for new technologies and new materials to achieve efficient and convenient production of oxygen. Metal-organic framework (MOF) has the characteristics of large specific surface area and many adsorption sites. 2 In terms of combination, it shows the advantages of clear structure-performance relationship and strong controllability. However, simply relying on the MOF material itself to absorb oxygen has a limited capacity. If the MOF material is further modified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02C08G83/00
CPCB01J20/226B01J20/22B01D53/02C08G83/008B01J2220/4812B01D2253/204
Inventor 王世锋张立波李勇
Owner TIBET UNIV
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