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Method for preparing nano-palladium catalyst by using protein assembly

A protein and assembly technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of uncontrollable nano-palladium particle size, high cost of preparation technology, Problems such as high energy consumption, to achieve the effect of improving size uniformity, improving catalytic efficiency, and improving dispersion

Pending Publication Date: 2022-07-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a method for utilizing protein assemblies to prepare nano-palladium catalysts. The technical problems are: 1) the preparation process of the prior art is not environmentally friendly; 2) the existing preparation technology has a high cost and can 3) the nano-palladium particle size prepared by the existing technology is uncontrollable and easy to agglomerate

Method used

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  • Method for preparing nano-palladium catalyst by using protein assembly
  • Method for preparing nano-palladium catalyst by using protein assembly
  • Method for preparing nano-palladium catalyst by using protein assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 (hemoglobin crystal prepares nano-palladium catalyst)

[0039] The first step is the preparation of hemoglobin crystals.

[0040] 1) Mix the hemoglobin solution and the crystallizing agent solution at a ratio of 1:1 to obtain a hemoglobin crystallizing solution.

[0041] The crystallizing agent solution is: 20% polyethylene glycol, 0.2M succinic acid, pH 7.0.

[0042] 2) The hemoglobin crystallisation solution was allowed to stand at 20°C for 1 to 3 days.

[0043] 3) Collect hemoglobin crystals by centrifugation and resuspend the hemoglobin crystals with a crystallizing agent solution to obtain a hemoglobin crystal suspension.

[0044] 4) Mix the hemoglobin crystal suspension with the glutaraldehyde solution to obtain cross-linked hemoglobin crystals.

[0045] 5) Wash the hemoglobin crystals with deionized water and freeze-dry to obtain the final cross-linked hemoglobin crystals.

[0046] Step 2, adding the hemoglobin crystals into deionized water to di...

Embodiment 2

[0064] Embodiment 2 (hemoglobin assembly prepares nano-palladium catalyst)

[0065] Step 1, preparation of hemoglobin assembly.

[0066] 1) Mix the hemoglobin solution and the precipitant solution at a ratio of 1:1 to obtain a hemoglobin assembly solution.

[0067] The precipitant solution is: 20% polyethylene glycol, pH 7.0.

[0068] 2) The hemoglobin assembly solution was allowed to stand at 20°C for 1 to 3 days.

[0069] 3) Collect the hemoglobin assembly by centrifugation and resuspend the hemoglobin assembly with a precipitant solution to obtain a hemoglobin assembly suspension.

[0070] 4) Mixing the hemoglobin assembly suspension with the glutaraldehyde solution to obtain a cross-linked hemoglobin assembly.

[0071] 5) Wash the hemoglobin assembly with deionized water, and obtain the final cross-linked hemoglobin assembly after freeze-drying.

[0072] Step 2, adding the hemoglobin assembly into deionized water to disperse evenly to obtain a hemoglobin assembly suspe...

Embodiment 3

[0087] Embodiment 3 (the preparation of nano-palladium catalyst by lysozyme crystal)

[0088] The first step is the preparation of lysozyme crystals.

[0089] 1) Mix the lysozyme solution and the crystallizing agent solution at a ratio of 1:1 to obtain a lysozyme crystallization solution.

[0090] The crystallizing agent solution is: 3%-6% NaCl.

[0091] 2) The lysozyme crystallization solution was allowed to stand at 4°C for 1 to 3 days.

[0092] 3) Collect lysozyme crystals by centrifugation and resuspend the lysozyme crystals with a crystallizing agent solution to obtain a lysozyme crystal suspension.

[0093] 4) Mix the lysozyme crystal suspension with the glutaraldehyde solution to obtain cross-linked lysozyme crystals.

[0094] 5) Wash the lysozyme crystals with deionized water and freeze-dry to obtain the final cross-linked lysozyme crystals.

[0095] Step 2: Add the lysozyme crystals into deionized water and disperse them uniformly to obtain a lysozyme crystal susp...

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Abstract

The invention relates to a method for preparing a nano-palladium catalyst by utilizing a protein assembly, which is characterized in that the nano-palladium catalyst with controllable particle size and high dispersity is prepared by utilizing a porous protein assembly, taking protein as a reducing agent and taking the pores of the assembly as a reactor. In the prior art, the preparation method of the metal nano-catalyst mainly has the problems that the preparation process is not environment-friendly, the energy consumption is high, the cost is high, the particle size is uncontrollable, the dispersity is poor and the like. The problem can be solved by the method for preparing the nano-palladium catalyst by using the protein assembly. The invention has the main advantages that: 1) the protein assembly has no environmental pollution problem in preparation and reaction processes; 2) the particle size of the nano-palladium is limited by the pore size of the protein assembly, so that the particle size can be controlled; and (3) the synthesized nano-palladium catalyst is good in dispersity and high in catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-palladium catalysts, and relates to a method for preparing nano-palladium catalysts by utilizing protein assemblies. Background technique [0002] Compared with traditional metal materials, metal nanoparticles have a higher specific surface area and have unique advantages in catalysis. Platinum group noble metals are widely used in the field of catalysts, among which nano-palladium is considered to be the most potential noble metal nanocatalyst. Compared with platinum, palladium has higher storage capacity and utilization value in nature, and palladium has better chemical stability and corrosion resistance. powerful. At present, the application of nano-palladium catalyst is very wide, and it can catalyze the decomposition of formic acid into H in dye batteries. 2 and CO 2 ; In industrial production, it can catalyze Suzuki reaction, Heck reaction, olefin hydrogenation, etc.; in the f...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/02B01J35/10
CPCB01J31/06B01J35/61B01J35/40
Inventor 尹大川晋晓倩刘杰张托弟
Owner NORTHWESTERN POLYTECHNICAL UNIV
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