Method for preparing gold-palladium nano-alloy by using protein assembly

A nano-alloy and protein technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of uncontrollable particle size of gold-palladium nano-alloy, unenvironmental technology, high cost, etc., and achieve uniformity Good performance, low cost, low cost effect

Pending Publication Date: 2022-07-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved are: 1) the existing preparation technology is not environmentally friendly; 2) the existing preparation technology has hig

Method used

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  • Method for preparing gold-palladium nano-alloy by using protein assembly
  • Method for preparing gold-palladium nano-alloy by using protein assembly
  • Method for preparing gold-palladium nano-alloy by using protein assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Example 1 (Preparation of gold-palladium nano-alloys from hemoglobin crystals)

[0062] The first step is the preparation of hemoglobin crystals.

[0063] 1) Mix the hemoglobin solution and the crystallizing agent solution at a ratio of 1:1 to obtain a hemoglobin crystallizing solution.

[0064] The crystallizing agent solution is: 20% polyethylene glycol, 0.2M succinic acid, pH 7.0.

[0065] 2) The hemoglobin crystallisation solution was allowed to stand at 20°C for 1 to 3 days.

[0066] 3) Collect hemoglobin crystals by centrifugation and resuspend the hemoglobin crystals with a crystallizing agent solution to obtain a hemoglobin crystal suspension.

[0067] 4) Mix the hemoglobin crystal suspension with the glutaraldehyde solution to obtain cross-linked hemoglobin crystals.

[0068] 5) Wash the hemoglobin crystals with deionized water and freeze-dry to obtain the final cross-linked hemoglobin crystals.

[0069] Step 2, adding the hemoglobin crystals into deionized w...

Embodiment 2

[0085] Example 2 (Preparation of gold-palladium nano-alloy by hemoglobin assembly)

[0086] Step 1, preparation of hemoglobin assembly.

[0087] 1) Mix the hemoglobin solution and the precipitant solution at a ratio of 1:1 to obtain a hemoglobin assembly solution.

[0088] The precipitant solution is: 20% polyethylene glycol, pH 7.0.

[0089] 2) The hemoglobin assembly solution was allowed to stand at 20°C for 1 to 3 days.

[0090] 3) Collect the hemoglobin assembly by centrifugation and resuspend the hemoglobin assembly with a precipitant solution to obtain a hemoglobin assembly suspension.

[0091] 4) Mixing the hemoglobin assembly suspension with the glutaraldehyde solution to obtain a cross-linked hemoglobin assembly.

[0092] 5) Wash the hemoglobin assembly with deionized water, and obtain the final cross-linked hemoglobin assembly after freeze-drying.

[0093] Step 2, adding the hemoglobin assembly into deionized water to disperse evenly to obtain an egg-hemoglobin a...

Embodiment 3

[0107] Example 3 (preparation of gold and palladium nanoalloys from lysozyme crystals)

[0108] The first step is the preparation of lysozyme crystals.

[0109] 1) Mix the lysozyme solution and the crystallizing agent solution at a ratio of 1:1 to obtain a lysozyme crystallization solution.

[0110] The crystallizing agent solution is: 3%-6% NaCl.

[0111] 2) The lysozyme crystallization solution was allowed to stand at 4°C for 1 to 3 days.

[0112] 3) Collect lysozyme crystals by centrifugation and resuspend the lysozyme crystals with a crystallizing agent solution to obtain a lysozyme crystal suspension.

[0113] 4) Mix the lysozyme crystal suspension with the glutaraldehyde solution to obtain cross-linked lysozyme crystals.

[0114] 5) Wash the lysozyme crystals with deionized water and freeze-dry to obtain the final cross-linked lysozyme crystals.

[0115] Step 2: Add the lysozyme crystals into deionized water and disperse them uniformly to obtain a lysozyme crystal su...

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Abstract

The invention relates to a method for preparing a gold-palladium nano-alloy by using a protein assembly, which is characterized in that palladium ions and gold ions in palladium salt and chloroauric acid are co-reduced to form the gold-palladium nano-alloy by using a three-dimensional porous protein assembly. In the prior art, the preparation method of the metal nano-alloy catalyst mainly has the problems that the preparation process is not environment-friendly, the energy consumption is high, the cost is high and the like. The problem can be solved by using the protein assembly to prepare the nano-palladium catalyst. The method has the main advantages that 1) the preparation process is environment-friendly and pollution-free; 2) the cost is low, and the energy consumption is low; and (3) the prepared gold-palladium nano-alloy compound is good in dispersity and does not agglomerate.

Description

technical field [0001] The invention belongs to the technical field of nano-alloy preparation, and relates to a method for preparing gold-palladium nano-alloy by using protein assembly. Background technique [0002] Metal nanomaterials have small size effects, quantum effects, interface effects and surface effects. Compared with traditional metal materials, they have great differences in physical properties such as sound, light, electricity, magnetism, and heat. It has great application value in national defense, medicine and other aspects. [0003] Compared with traditional metal materials, metal nanoparticles have a higher specific surface area and have unique advantages in catalysis, especially platinum group noble metal nanomaterials. However, the storage of precious metal elements in the earth's crust is low, so it is very necessary to prepare nano-alloy materials to replace single-metal nano-materials. Using metal nano-alloy materials as catalysts can not only reduce...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/054B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00Y02E60/50
Inventor 尹大川晋晓倩周雅青赵风珠
Owner NORTHWESTERN POLYTECHNICAL UNIV
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