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Preparation method of metal-oxide dual-interface catalyst

A technology of oxides and catalysts, which is applied in the field of preparation of metal-oxide double interface catalysts, can solve the problem of no public report of double metal-oxide interface catalysts, etc., and achieves the effect of good isolation and good series reaction.

Inactive Publication Date: 2016-08-03
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no published method for the nanoscale controllable preparation of bimetallic-oxide interfacial catalysts

Method used

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  • Preparation method of metal-oxide dual-interface catalyst
  • Preparation method of metal-oxide dual-interface catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Mix and disperse nano-carbon spirals (CNCs) with ethanol into a uniform suspension. The sample has a concentration of 0.01g / ml. The sample is coated on the surface of the glass sheet. After evaporation, it is placed in the atomic layer deposition chamber. The pressure of the chamber is 70Pa, the carrier gas flow rate is fixed during the deposition process.

[0032] 2) Using atomic layer deposition technology to deposit aluminum oxide film on the surface of the carbon spiral. The set deposition parameters are: the reaction temperature is 150°C, the temperature of the reaction source trimethylaluminum and water is 25°C, and the nitrogen flow rate is 50 sccm. First pulse the trimethyl aluminum vapor into the deposition chamber, the pulse time is 0.02s, the hold time is 5s, and the purge time is 15s; then the water vapor is pulsed into the deposition chamber, the pulse time is 0.1s, the hold time is 15s, and the blow The scanning time is 20s, and a deposition cycle is comp...

Embodiment 2

[0040] The experiment was performed using the same method as in Example 1, and the difference from Example 1 was that the number of cycles of the sacrificial layer polyimide organic film was 80 cycles. At this time Al 2 O 3 / Ni-Pt / TiO 2 The yield of aniline on the catalyst reached 50% within 30 minutes, and reached more than 98% within 180 minutes. This indicates that the activity of the catalyst can be changed by changing the thickness of the sacrificial layer.

Embodiment 3

[0042] 1) Mix and disperse carbon nanotubes with ethanol to form a uniform suspension. The sample concentration is 0.03g / ml, and it is coated on the surface of the glass sheet. After evaporation, it is placed in an atomic layer deposition chamber. The chamber pressure is 50Pa. The flow of carrier gas is fixed during the process.

[0043] 2) Using atomic layer deposition technology to deposit zinc oxide film on the surface of carbon nanotubes. The set deposition parameters are: the reaction temperature is 100°C, the temperature of the reaction source diethylzinc and water is 25°C, and the nitrogen flow rate is 40 sccm. First pulse diethylzinc vapor into the deposition chamber, the pulse time is 0.02s, the hold time is 5s, and the purge time is 15s; then the water vapor is pulsed into the deposition chamber, the pulse time is 0.1s, the hold time is 15s, and the blow The scanning time is 20s, and a deposition cycle is completed so far. Repeated 150 cycles to obtain zinc oxide film...

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Abstract

A preparation method of a metal-oxide dual-interface catalyst includes the steps that nanofibers and ethyl alcohol are mixed and dispersed to form uniform suspension, and the surface of a glass sheet is coated with the suspension to obtain a matrix; an oxide film or nanoparticles or a polymer film is deposited on the surface of nanofibers of the matrix through atomic layer deposition, the organic polymer film is removed through heat treatment, and the metal-oxide dual-interface catalyst is obtained .The preparation method has the advantages that the particle size is controllable, dispersion is uniform, and metal-oxide interfaces are controllable.

Description

Technical field [0001] The invention relates to a method for preparing a metal-oxide double interface catalyst. Background technique [0002] The design and preparation of high-efficiency catalysts is the key to the development of new green energy chemical and energy storage technologies. The existing industrial heterogeneous catalysts mainly improve the selectivity and activity of chemical reactions by changing the composition, carrier or preparation method. However, traditional catalyst preparation methods cannot achieve the uniformity of catalyst composition and surface structure. The formation of by-products and the instability of the catalyst structure increase the complexity and cost of the chemical process, and the generation of pollutants also causes greater environmental impact. pressure. In addition, most chemical processes require multi-step reactions to obtain the target product, the atomic utilization rate of the reaction raw materials is low, and the reaction and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/34B01J37/08B01J37/16B01J35/02B01J23/89B01J23/60B01J23/46B01J23/80
CPCB01J23/468B01J23/60B01J23/80B01J23/892B01J23/8986B01J37/08B01J37/16B01J37/342B01J35/00B01J35/30
Inventor 覃勇张斌葛会宾谷晓敏梁浩杰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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