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Method for simply preparing amorphous alloy CuB23 nano short tube and application thereof

A technology of amorphous alloy and nano short tube, which is applied in the direction of nanotechnology, can solve the problem of not using amorphous Cu-B alloy to catalyze the Heck reaction, and achieve the effect of safe use, high catalytic efficiency and high efficiency

Inactive Publication Date: 2015-04-29
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To the best of our knowledge, there are currently no reports of using amorphous Cu-B alloys to catalyze the Heck reaction

Method used

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  • Method for simply preparing amorphous alloy CuB23 nano short tube and application thereof
  • Method for simply preparing amorphous alloy CuB23 nano short tube and application thereof
  • Method for simply preparing amorphous alloy CuB23 nano short tube and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Amorphous alloy CuB 23 The preparation and application of short nanotubes mainly include the following steps:

[0041] 1) Add 40 mL of 25% NH 3 ·H 2 O solution was added 10mL copper acetate solution (0.0085mol) to obtain Cu(NH 3 ) 4 2+ Complex;

[0042] 2) Then add 32mL of 1.0MKBH in an argon protective atmosphere at a temperature of 298K 4 Aqueous solution and 0.003M polyethylene glycol;

[0043]3) After turning on the plasma reaction for 5 minutes, the target product is obtained;

[0044] 4) The product is first washed once with deionized water, and then washed three times with absolute ethanol;

[0045] 5) Store it in ethanol solution until use;

[0046] 6) The prepared product is used to catalyze the Heck crosslinking reaction of cyclohexane iodide and methyl ketene.

[0047] figure 1 For the prepared CuB 23 The XRD pattern of the short nanotube, it can be seen that the prepared CuB 23 The nanotubes are poorly crystalline, confirming the conclusion that...

Embodiment 2

[0055] 1) Add 40 mL of 25% NH 3 ·H 2 O solution was added 10mL copper acetate solution (0.0085mol) to obtain Cu(NH 3 ) 4 2+ Complex;

[0056] 2) Then add 32mL of 1.0MKBH in an argon protective atmosphere at a temperature of 298K 4 Aqueous solution and 0.003M polyethylene glycol;

[0057] 3) After turning on the plasma reaction for 10 minutes, the target product was obtained;

[0058] 4) The product is first washed once with deionized water, and then washed three times with absolute ethanol;

[0059] 5) Store it in ethanol solution until use;

[0060] 6) The prepared product is used to catalyze the Heck crosslinking reaction of cyclohexane iodide and acrylonitrile. Example 3

Embodiment 3

[0061] 1) Add 40 mL of 25% NH 3 ·H 2 O solution was added 10mL copper acetate solution (0.0085mol) to obtain Cu(NH 3 ) 4 2+ Complex;

[0062] 2) Then add 32mL of 1.0MKBH in an argon protective atmosphere at a temperature of 298K 4 Aqueous solution and 0.003M polyethylene glycol;

[0063] 3) After turning on the plasma reaction for 20 minutes, the target product was obtained;

[0064] 4) The product is first washed once with deionized water, and then washed three times with absolute ethanol;

[0065] 5) Store it in ethanol solution until use;

[0066] 6) The prepared product is used to catalyze the Heck crosslinking reaction of cyclopentane iodide and methyl ketene.

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Abstract

The invention discloses a method for simply preparing an amorphous alloy CuB23 nano short tube and application thereof. The method comprises the following steps: (1) adding a copper acetate solution into a NH3.H2O solution with a concentration of 25 percent by weight to obtain a Cu(NH3)42+compound; (2) then adding a KBH4 aqueous solution and polyethylene glycol in the argon protective atmosphere at the temperature of 298K; (3) performing plasma reaction for 5-20 minutes to obtain a target product; (4) washing the product with deionized water for one time, then washing with anhydrous ethanol for three times; (5) storing the product in an ethanol solution for standby. In the Heck-coupling reaction, the CuB23 nano tube is an effective catalyst for substituting Pd and Ni complexes, is cheaper and does not need any ligand. Meanwhile, after being recycled for 10 times, the catalyst has small activity loss and has no crystal shape and structure change.

Description

technical field [0001] The invention relates to the field of nanomaterials and catalysis, and mainly relates to the preparation of monodisperse amorphous alloy CuB by using liquid phase plasma (SPP, solution plasma process) technology 23 The method of nano-short tubes, and its application in catalyzing the Heck coupling reaction of low activity halogenated alkanes and alkenes. Background technique [0002] Heck cross-coupling is an intramolecular C–C bond formation reaction between a halide or sulfonate electrophile and an alkene under mild conditions. Due to its applications in many fields, including natural products and fine chemical synthesis, it is one of the most intensively studied organic reactions. So far, most catalysts for the Heck reaction are based on Pd, such as Pd complexes and Pd nanoparticles. Among these Pd catalysts, soluble Pd compounds, mainly phosphine-Pd complexes, are the most effective catalysts for the Heck reaction. However, Pd catalysts are very...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C1/10B82Y40/00
Inventor 童东革李春杨帆傅仕艳储伟
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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