Preparation method of loaded nano-metal catalyst based on UIO-66

A UIO-66, metal catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the long and cumbersome catalyst synthesis steps, catalyst adverse effects, Stabilizer is difficult to remove and other problems, to achieve the effect of high industrial use value, simple preparation method, good thermal stability

Inactive Publication Date: 2019-08-23
昆山普瑞凯纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to synthesize MOF materials first, and then through the subsequent loading of metal active components, a metal catalyst with better dispersion can be obtained through two steps. The catalyst has adverse effects, because the stabilizer is difficult to completely remove during the preparation process, such as polyvinylpyrrolidone (PVP), etc.

Method used

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  • Preparation method of loaded nano-metal catalyst based on UIO-66
  • Preparation method of loaded nano-metal catalyst based on UIO-66
  • Preparation method of loaded nano-metal catalyst based on UIO-66

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Rh@CeO2@C Catalyst

[0025] Weigh 9.36g of cerium ammonium nitrate and dissolve it in 22ml of water, dissolve 2.82g of terephthalic acid in 91ml of N,N-dimethylformamide, after ultrasonic dissolution, mix the two solutions evenly, and keep stirring at 100°C , add 1.00g of rhodium chloride solution (10mgRh / mL), continue to stir for 20min, filter, wash with N,N-dimethylformamide three times, wash three times with water, wash three times with ethanol, and bake at 60°C for 12h. Rh@UIO-66(Ce) material; after grinding the Rh@UIO-66(Ce) material, the Rh@UIO-66(Ce) sample was transferred to a tube furnace, and the temperature was raised to a temperature of 5°C / min. The pyrolysis temperature was 600 °C, and it was pyrolyzed for 5 h in a nitrogen atmosphere. After natural cooling, the Rh@CeO2@C precursor was obtained, and the Rh@CeO2@C catalyst was obtained after reduction.

Embodiment 2

[0027] Preparation of Pt@CeO2@C Catalyst

[0028] Dissolve 9.36g of ceric ammonium nitrate in 22ml of water and 2.82g of terephthalic acid in 91ml of N,N-dimethylformamide. After ultrasonically dissolving, mix the two solutions evenly and keep stirring at 100°C. Add 0.50g chloroplatinic acid solution (20mgPt / mL), continue stirring for 20min, filter, wash with N,N-dimethylformamide three times, wash three times with water, wash three times with ethanol, and bake at 60°C for 12h to obtain Pt @UIO-66(Ce) material; after grinding the Pt@UIO-66(Ce) material, the Pt@UIO-66(Ce) sample was transferred to a tube furnace, and the temperature was raised to the heat at a heating rate of 5°C / min. The decomposition temperature was 800 °C, and it was pyrolyzed for 5 h in a nitrogen atmosphere. After natural cooling, the Pt@CeO2@C precursor was obtained, and the Pt@CeO2@C catalyst was obtained after reduction.

Embodiment 3

[0030] Preparation of Ir@ZrO2@C Catalyst

[0031] Dissolve 3.98g of zirconium tetrachloride in 22ml of water and 2.82g of terephthalic acid in 91ml of N,N-dimethylformamide. After ultrasonically dissolving, mix the two solutions evenly and keep stirring at 100°C. , add 0.50g chloroiridic acid solution (20mgIr / mL), continue to stir for 20min, filter, wash with N,N-dimethylformamide three times, wash three times with water, wash three times with ethanol, and bake at 60°C for 12h to get Ir@UIO-66(Zr) material; after grinding the Ir@UIO-66(Zr) material, the Ir@UIO-66(Zr) sample was transferred to a tube furnace, and the temperature was raised to a temperature of 5°C / min. The pyrolysis temperature was 800 °C, and it was pyrolyzed for 5 h in a nitrogen atmosphere. After natural cooling, the Ir@ZrO2@C precursor was obtained, and the Ir@ZrO2@C catalyst was obtained after reduction.

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Abstract

The invention discloses a preparation method of a loaded metal catalyst based on metal-organic framework UIO-66. The catalyst is prepared by: adding a carrier precursor metal salt into water, adding an organic ligand into N, N-dimethylformamide, after full dissolution of the two substances, mixing the two solutions evenly, adding an active component precursor, and performing one-pot synthesis to obtain a catalyst precursor, and carrying out high temperature roasting and reduction to obtain the metal catalyst. The high stability metal catalyst M@BO2@C prepared by one-pot synthesis method, the method prepares the loaded metal catalyst based on UIO-66 structure, the preparation method is simple, provides a new synthesis method for preparation of nano-scale catalyst, and has high industrial utilization value. The catalyst prepared according to the invention is subjected to high temperature calcination and reduction, has good thermal stability and potential application space, moreover, thecatalyst still maintains the shape of UIO-66 after high temperature calcination.

Description

technical field [0001] The invention relates to the field of metal catalyst preparation, in particular to a preparation method based on UIO-66 supported nanometer metal catalyst. Background technique [0002] Metal-organic framework (MOF) materials are organic-inorganic hybrid materials with intramolecular pores formed by the self-assembly of organic ligands and metal ions or clusters through coordination bonds. The excellent structural characteristics such as well-tuned pore structure, high specific surface area and easy functionalization provide a physical space for supporting highly dispersed nano-metal catalysts, effectively preventing the agglomeration of metal nanoparticles, which is conducive to the full utilization of active metal components. , and then effectively promote the catalytic reaction. In recent years, the preparation of metal catalytic materials by MOF materials and their application in the field of catalysis have gradually become a popular research dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/46B01J23/72B01J23/83B01J23/75C08G83/00
CPCB01J23/468B01J23/63B01J23/72B01J23/75B01J23/83C08G83/008
Inventor 罗文豪谢林峰
Owner 昆山普瑞凯纳米技术有限公司
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