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Mesoporous Ru-MIL-125-NH2 catalyst prepared from supercutical fluid

A ru-mil-125-nh2, supercritical fluid technology, applied in the field of materials, can solve the problem of small pore size and achieve the effect of improving reactivity and visible light absorption capacity

Active Publication Date: 2019-08-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very small pore size (~1nm) of MOFs, it remains a great challenge

Method used

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  • Mesoporous Ru-MIL-125-NH2 catalyst prepared from supercutical fluid
  • Mesoporous Ru-MIL-125-NH2 catalyst prepared from supercutical fluid
  • Mesoporous Ru-MIL-125-NH2 catalyst prepared from supercutical fluid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The high mesoporous Ru-MIL-125-NH of the present embodiment 2 The synthesis method is as follows:

[0033] Synthesis of highly mesoporous Ru-MIL-125-NH 2 The metal salt precursor used is RuCl 3 ·xH 2 O, MOFs material is MIL-125-NH 2 .

[0034] MIL-125-NH 2 with RuCl 3 ·xH 2 O was added to the reaction kettle according to the mass ratio of 100:5, stirred at room temperature until uniformly mixed, then filled with carbon dioxide at a certain pressure (5.58MPa), reacted for 5 hours at a reaction temperature of 200°C, and cooled to room temperature , remove the carbon dioxide in the reactor by pressure relief, centrifuge to obtain a solid precipitate, wash the obtained precipitate with DMF and methanol, and then place it in a vacuum drying oven to remove the remaining solvent molecules, the drying temperature is 80 ° C, Ru-MIL-125-NH was obtained after drying for 12 hours 2 .

[0035] MIL-125-NH 2 And the obtained high mesoporous Ru-MIL-125-NH of this embodiment ...

Embodiment 2

[0039] Mesoporous Ru-MIL-125-NH of the present embodiment 2 The synthesis method is as follows:

[0040] Synthesis of Mesoporous Ru-MIL-125-NH 2 The metal salt precursor used is RuCl3 ·xH 2 O, MOFs material is MIL-125-NH 2 .

[0041] MIL-125-NH 2 with RuCl 3 ·xH 2 O is added to the reaction kettle according to the mass ratio of 100:5, stirred at room temperature until uniformly mixed, then filled with carbon dioxide at a certain pressure (5.58MPa), and reacted for 1 hour at a reaction temperature of 200°C, then cooled to room temperature , remove the carbon dioxide in the reactor by pressure relief, centrifuge to obtain a solid precipitate, wash the obtained precipitate with DMF and methanol, and then place it in a vacuum drying oven to remove the remaining solvent molecules, the drying temperature is 80 ° C, Ru-MIL-125-NH was obtained after drying for 12 hours 2 .

[0042] The resulting Ru-MIL-125-NH 2 Scanning, transmission electron microscopy, X-ray diffraction (X...

Embodiment 4

[0044] Mesoporous Ru-MIL-125-NH of the present embodiment 2 The synthesis method is as follows:

[0045] Synthesis of Mesoporous Ru-MIL-125-NH 2 The metal salt precursor used is RuCl 3 ·xH 2 O, MOFs material is MIL-125-NH 2 .

[0046] MIL-125-NH 2 with RuCl 3 ·xH 2 O was added to the reaction kettle according to the mass ratio of 100:5, stirred at room temperature until uniformly mixed, then filled with carbon dioxide at a certain pressure (5.58MPa), reacted for 3 hours at a reaction temperature of 200°C, and cooled to room temperature , remove the carbon dioxide in the reactor by pressure relief, centrifuge to obtain a solid precipitate, wash the obtained precipitate with DMF and methanol, and then place it in a vacuum drying oven to remove the remaining solvent molecules, the drying temperature is 80 ° C, Ru-MIL-125-NH was obtained after drying for 12 hours 2 .

[0047] The resulting Ru-MIL-125-NH 2 Scanning, transmission electron microscopy, X-ray diffraction (XR...

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Abstract

The invention discloses a mesoporous Ru-MIL-125-NH2 catalyst prepared from a supercutical fluid. The mesoporous Ru-MIL-125-NH2 material is prepared by putting prepared MIL-125-NH2 and RuCl3*xH2O intomethanol according to a feeding ratio, uniformly stirring and mixing the components at the room temperature, introducing carbon dioxide of certain pressure, and conducting a reaction for 5 hours at 200 DEG C; cooling the mixture to the room temperature, removing the carbon dioxide in the reaction kettle in a pressure release mode, washing the obtained precipitate with N,N-dimethyl formamide (DMF)and methanol, putting the product obtained through centrifugation into a vacuum drying tank, removing residual DMF and methanol, and by conducting drying for 24 hours at a drying temperature of 80 DEGC, so as to obtain the mesoporous Ru-MIL-125-NH2 catalyst material. The material has good catalysis activity upon photocatalytic water splitting.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a mesoporous Ru-MIL-125-NH prepared by supercritical fluid 2 catalyst. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous materials in which metal ions or metal clusters are linked by organic ligands. This kind of compound has excellent characteristics such as adjustable microstructure, high porosity and large specific surface area. These unique properties make it widely used in the fields of gas storage, gas purification and separation, heterogeneous catalysis, etc. Applications. In particular, due to their designable metal oxygen clusters and organic ligands and their high porosity, MOFs have broad application prospects in catalytic materials. However, due to their low activity, the application of MOFs materials as catalysts is still very limited. Generally, this problem is solved by reducing metal precursors to metal nanoparticles dispersed on the ou...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22B01J35/10C01B3/04
CPCC08G83/008B01J31/1691C01B3/042B01J2531/46B01J2531/821B01J2531/0241B01J35/39B01J35/617B01J35/618B01J35/635B01J35/647Y02E60/36Y02P20/54
Inventor 章凡玉张丙兴张建玲刘力菲万强杨冠英
Owner INST OF CHEM CHINESE ACAD OF SCI
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