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Preparation method of pore-modulatable Fe-based metal organic framework-phosphotungstic acid

A metal-organic framework and organic framework technology, applied in the field of materials, can solve problems such as limiting the application of PTA, and achieve the effects of simple preparation process and high material yield

Active Publication Date: 2018-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can only be applied to the catalytic conversion of small molecules such as hexanol and cyclopentene, while macromolecules such as cellulose and starch are difficult to enter into the pores of MOFs and fully contact with the catalytic center of PTA, which limits the application of PTA.

Method used

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  • Preparation method of pore-modulatable Fe-based metal organic framework-phosphotungstic acid
  • Preparation method of pore-modulatable Fe-based metal organic framework-phosphotungstic acid
  • Preparation method of pore-modulatable Fe-based metal organic framework-phosphotungstic acid

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Effect test

Embodiment 1

[0024] Pore-tunable Fe-based metal-organic framework-phosphotungstic acid material was prepared by the following method: 50mL distilled water, 6.0mmol FeCl 3 ·6H 2 O, 0.3mmol PTA, 6.0mmol 2-aminoterephthalic acid, and 1.8mmol CTAB were stirred evenly at room temperature, then added to a 100mL polytetrafluoroethylene reactor, heated at a constant temperature of 110°C for 24h, cooled to room temperature, and then used The solid obtained after repeated washing and centrifugation with DMF and ethanol was vacuum-dried at 80°C for 16 hours, and the obtained solid was the Fe-based metal-organic framework-phosphotungstic acid material with adjustable channels.

Embodiment 2

[0026] Pore-tunable Fe-based metal-organic framework-phosphotungstic acid material was prepared by the following method: 50mL distilled water, 6.0mmol FeCl 3 ·6H 2 O, 0.3mmol PTA, 6.0mmol 2-aminoterephthalic acid, and 3.6mmol CTAB were stirred evenly at room temperature, then added to a 100mL polytetrafluoroethylene reactor, heated at a constant temperature of 110°C for 24h, cooled to room temperature, and then used The solid obtained after repeated washing and centrifugation with DMF and ethanol was vacuum-dried at 80°C for 16 hours, and the obtained solid was the Fe-based metal-organic framework-phosphotungstic acid material with adjustable channels.

Embodiment 3

[0028] Pore-tunable Fe-based metal-organic framework-phosphotungstic acid material was prepared by the following method: 50mL distilled water, 6.0mmol FeCl 3 ·6H 2 O, 0.3mmol PTA, 6.0mmol 2-aminoterephthalic acid, 5.4mmol CTAB, 7.2mmolTMB were stirred evenly at room temperature, then added to a 100mL polytetrafluoroethylene reactor, heated at 110°C for 24h, and cooled to room temperature Finally, the solid obtained after repeated washing and centrifugation with DMF and ethanol was vacuum-dried at 80°C for 16 hours, and the obtained solid was the Fe-based metal-organic framework-phosphotungstic acid material with adjustable channels.

[0029] The pore size distribution figure of embodiment 1~2 gained material is as follows figure 1 with figure 2 As shown, it can be seen that the products added with CTAB all have a large-meso-microporous structure, wherein the material pore size distribution obtained in Examples 1 to 2 is 1.4 to 78.2nm, and the ratio of large-meso-micropores ...

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Abstract

The invention discloses a preparation method of pore-modulatable Fe-based metal organic framework-phosphotungstic acid. The preparation method comprises the following steps: simultaneously adding FeCl3-6H2O, 2-aminoterephthalic acid, phosphotungstic acid, cetyl trimethyl ammonium bromide and TMB, mixing and stirring uniformly, carrying out a thermostatic reaction by a hydrothermal method, centrifuging, washing, and drying to obtain the pore-modulatable Fe-based metal organic framework-PTA. Pore diameter of the catalyst can be modulated within different ranges of micropores, mesopores and macropores; heat stability is good; catalytic activity is high; the preparation method is simple and is easy for batch production; there is no need to add an organic solvent or alkaline solvent in the synthesis process, and the synthesis process is green and environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a method for preparing Fe-based metal-organic framework-phosphotungstic acid with adjustable channels. Background technique [0002] As a solid acid catalyst with strong oxidizing properties and strong electronegativity, PTA has broad application prospects, and its immobilization is the key to solving the difficulties in its recovery and reuse. Without affecting the catalytic performance of PTA, the existing solid-phase PTA formed by immobilization such as hydrogen zeolite and MOFs has a microporous structure with channels less than 2nm. It can only be applied to the catalytic conversion of small molecules such as hexanol and cyclopentene, while macromolecules such as cellulose and starch are difficult to enter the MOFs pores and fully contact with the PTA catalytic center, which limits the application of PTA. The present invention proposes a method for preparing Fe-based me...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10C13K1/02
CPCC13K1/02B01J31/1658B01J31/1691B01J31/2213B01J31/2217B01J2531/842B01J35/695
Inventor 王艳万金泉韩劲椰马邕文
Owner SOUTH CHINA UNIV OF TECH
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