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Method for preparing catalyst with thermal-instability material carrier by using low-temperature plasma and application of catalyst

A technology of thermal instability and low-temperature plasma, applied in the fields of catalysis science and material science, can solve the problems of unrealized loading catalyst, cumbersome preparation process, and great environmental hazards, and achieve easy control of particle size, good catalytic activity, and particle size distribution The effect of narrow range

Inactive Publication Date: 2011-08-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the preparation process is cumbersome, the operation is complicated, the conditions are harsh and difficult to control, the reaction time is long, and the above-mentioned volatile organometallic precursors are harmful to the environment.
However, methods for preparing catalysts supported by thermally labile materials have not been realized

Method used

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  • Method for preparing catalyst with thermal-instability material carrier by using low-temperature plasma and application of catalyst
  • Method for preparing catalyst with thermal-instability material carrier by using low-temperature plasma and application of catalyst
  • Method for preparing catalyst with thermal-instability material carrier by using low-temperature plasma and application of catalyst

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Experimental program
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Effect test

Embodiment 1

[0033] Will Cu 3 (BTC) 2 Loaded Pd(NO 3 ) 2 Put it between the two electrode plates of the discharge tube in the vacuum chamber, seal it tightly, evacuate the vacuum chamber, then fill it with argon as the discharge gas, maintain a pressure of 80Pa, apply a DC voltage of 500V to the electrodes, and use glow discharge plasma Bulk reduced Pd(N0 3 ) 2 , the reduction time is 60 min, and the nano-palladium particles are prepared, and the particle diameter is 2-3 nm.

[0034] Cu produced 3 (BTC) 2 The supported nano-palladium particle catalyst is analyzed by electron diffraction, photoelectron spectroscopy, physical adsorption and transmission electron microscopy, and the following analysis results can be obtained:

[0035] like figure 1 Shown electron diffraction pattern, only has the diffraction peak of palladium simple substance among the figure, shows that palladium nitrate is completely reduced;

[0036] like figure 2 The photoelectron energy spectrogram shown can b...

Embodiment 2

[0043] Will Cu 3 (BTC) 2 Loaded AgNO 3 Put it between the two electrode plates of the discharge tube in the vacuum chamber, seal it tightly, evacuate the vacuum chamber, then fill it with nitrogen as the discharge gas, maintain a pressure of 120Pa, apply an AC voltage of 1500V on the electrode, and use glow discharge plasma reduced AgNO 3 , the reduction time is 80min, and the nano-silver particles are prepared. AgNO was confirmed by electron diffraction, photoelectron spectroscopy, physical adsorption and transmission electron microscopy 3 Completely reduced to simple silver, and evenly loaded on the carrier, the particle size is 4-20nm. This sample was used for CO oxidation with good results.

Embodiment 3

[0045] The MOF-177-loaded H 2 PtCl 6 Place it between the two electrode plates of the discharge tube in the vacuum chamber, seal it tightly, evacuate the vacuum chamber, then fill it with helium as the discharge gas, maintain a pressure of 80Pa, apply a DC voltage of 200V to the electrodes, and use glow discharge plasma reduced H 2 PtCl 6 , the reduction time is 120min, and nano-platinum particles are prepared. It was confirmed by electron diffraction, photoelectron spectroscopy, physical adsorption and transmission electron microscopy that H 2 PtCl 6 It is completely reduced to elemental platinum, and it is evenly loaded on the carrier, and its particle size is 3-10nm. This sample was used for CO oxidation with good results.

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Abstract

The invention relates to a method for preparing a catalyst with thermal-instability material carrier by using low-temperature plasma and an application of the catalyst, and the method comprises the following steps: impregnating thermal-instability material with metal salt; directly loading the thermal-instability material carrying the metal salt into a plasma discharger; vacuumizing the interior of the plasma discharger, then introducing plasma discharge gas, maintaining the pressure of the gas at 30-200Pa, utilizing a high-voltage power supply to apply 200-5000V direct current or alternatingcurrent to two ends of an electrode for enabling the discharge gas to discharge, and reducing or decomposing the metal salt with the formed plasma for 5-120 minutes without damaging the structure of the thermal-instability material so as to obtain the required catalyst finally. The catalyst with a thermal-instability material carrier, which is prepared from plasma, has the advantages of large output, good catalytic activity and the like, and the particle size of active components can be controlled easily. The adverse thermal effect and the series damages to the structure of the material with the thermal instability under high temperature can be avoided, so that the active components are fine and small in particles, uniform in distribution, high in purity and good in dispersivity.

Description

technical field [0001] The invention relates to the technical fields of catalysis science and material science, in particular to a method and application for preparing a thermally unstable material-supported catalyst by low-temperature plasma. Background technique [0002] Thermally unstable materials, that is, materials that are sensitive to high temperature and will decompose or destroy the structure at a slightly higher temperature. Such materials, such as metal-organic frameworks (MOFs, Metal-organic frameworks), graphene and resins, each have very unique properties and have broad application prospects. [0003] Metal-organic frameworks, also known as coordination polymers, are a new class of porous materials with periodic network structures formed by transition metal ions or metal clusters and organic ligands through a self-assembly process. Compared with traditional porous materials (such as zeolite molecular sieves, activated carbon, etc.), metal-organic frameworks h...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J31/32B01J23/44B01J31/26B01J37/00B01J31/28B01J23/42C01B31/20C01B32/50
Inventor 刘昌俊周游叶静云李英芝于越
Owner TIANJIN UNIV
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