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A method for synthesizing precious metal MOFs composites

A composite material and precious metal technology, which is used in the field of synthesizing precious metal MOFs composite materials, can solve the problems of blocking pores, affecting catalytic activity, MOFs structure and pore collapse, and achieves the effects of high yield, short synthesis cycle and few steps.

Active Publication Date: 2020-09-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, if these well-applied MOFs are used as catalyst supports to support noble metals, the noble metals often block the pores or cause the structure and pores of MOFs to collapse during the subsequent reduction of noble metals, seriously affecting the catalytic activity.

Method used

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  • A method for synthesizing precious metal MOFs composites
  • A method for synthesizing precious metal MOFs composites
  • A method for synthesizing precious metal MOFs composites

Examples

Experimental program
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Embodiment 1

[0046] A method for synthesizing precious metal MOFs composite materials that the present embodiment relates to, the content of described method is: dissolving 4.8g of ferrous chloride tetrahydrate in 50mL of water, and dissolving 0.77g of sodium hydroxide in 24mL 0.71 g of anhydrous sodium sulfate was weighed and dissolved in 10 mL of water. The three are quickly mixed and added, stirred and mixed quickly, and aged at room temperature for 24 hours. Dissolve 1g of chloroauric acid powder in 100mL of aqueous solution to configure chloroauric acid solution. Add 1mL of chloroauric acid solution to the above solution, and stir for 30 minutes. Weigh 5.064 g of trimesic acid powder, and dissolve it in 224 mL of ethanol to form a homogeneous solution. The ethanol solution was mixed with the above solution and stirred for 24 hours. Subsequently, the reaction product was centrifuged at 6,000 rpm for 30 minutes to collect samples, redispersed in an appropriate amount of ethanol, and ...

Embodiment 2

[0054] A kind of method for synthesizing precious metal MOFs composite material that present embodiment relates to, the content of described method is:

[0055] Dissolve 8.234 g of ferrous chloride dihydrate in 100 mL of water, dissolve 1.54 g of sodium hydroxide in 48 mL of water, and dissolve 1.421 g of anhydrous sodium sulfate in 20 mL of water. The three are quickly mixed and added, stirred and mixed quickly, and aged at room temperature for 3 hours. Dissolve 1 g of potassium chloroplatinate powder in 100 mL of aqueous solution to prepare a potassium chloroplatinate solution. Take 5 mL of potassium chloroplatinate solution and add it to the above solution, and stir for 30 minutes. Weighed 10.12 g of trimesic acid powder and dissolved it in 450 mL of ethanol to form a homogeneous solution. The ethanol solution was mixed with the above solution and stirred for 6 hours. Subsequently, the reaction product was filtered with a quantitative filter paper with a pore size of 1-3...

Embodiment 3

[0057] A kind of method for synthesizing precious metal MOFs composite material that present embodiment relates to, the content of described method is:

[0058] Dissolve 5.74 g of cobalt chloride hexahydrate in 50 mL of water, 0.77 g of sodium hydroxide in 24 mL of water, and 0.71 g of anhydrous sodium sulfate in 10 mL of water. The three were quickly mixed and added, stirred and mixed evenly, and aged at room temperature for 6 hours. Dissolve 1 g of palladium chloride powder in 100 mL of aqueous solution to prepare a palladium chloride solution. Take 1 mL of palladium chloride solution and add to the above solution, and stir for 30 minutes. Weigh 5.064 g of trimesic acid powder, and dissolve it in 224 mL of ethanol to form a homogeneous solution. The ethanol solution was mixed with the above solution and stirred for 12 hours. Subsequently, the reaction product was centrifuged at 6000 rpm for 30 minutes to collect a sample, which was redispersed in an appropriate amount of ...

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Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to a method for synthesizing a noble metal MOFs composite material. The method comprises the steps of: firstly preparing a solution containing metal hydroxide from a metal salt solution, an alkali liquid and a dispersant by adopting a normal-temperature normal-pressure liquid phase synthesis method, then adding a salt solution of noble metal, performing stirring, adding an organic ligand solution to obtain filter residues, drying the filter residues to obtain the noble metal MOFs composite material. The noble metal MOFs composite material has a very short cycle of synthesis, the method is suitable for industrial large-scale production, and the obtained MOFs material has good catalytic performance and high activity as a probe in a reaction; and the method can be widely applied to researches and production of novel catalyst materials.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for synthesizing precious metal MOFs composite materials. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous materials composed of metal ions / clusters and organic ligands connected in a highly ordered manner. Due to their excellent properties such as structural diversity, porosity, tailorability, and ultra-high specific surface area, MOFs have shown potential application prospects in many research fields in recent years, especially the in-depth research and development of their catalytic applications has become a research hotspot today. , such as Hiroyasu Furukawa, Kyle E. Cordova, Michael O'Keeffe, and Omar M. Yaghi, Science, 341, 974 (2013). Jeong Yong Lee, Omar K.Farha, John Roberts, Karl A. Scheidt, Son Binh T. Nguyen and Joseph T. Hupp, Chem. Soc. Rev., 38, 1450 (2009) found that when MOFs were used as catalyst supports...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J35/10B01J37/16
CPCB01J31/1691B01J31/2239B01J35/006B01J35/10B01J37/16
Inventor 于然波王祖民
Owner UNIV OF SCI & TECH BEIJING
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