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Preparation method of inorganic biological composite nano-catalyst Au@A beta 2535

A nano-catalyst, biological technology, applied in the preparation of organic compounds, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve problems such as toxic chemical reagents, achieve good catalytic effect, structure Controllable and simple preparation method

Active Publication Date: 2017-09-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past decades, a variety of chemical methods have been used to synthesize gold nanoparticles, however, these methods have some disadvantages: such as the use of toxic chemical reagents, the use of high temperature or pressure, extreme reaction conditions such as strong acidity or alkalinity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of polypeptide solution:

[0031] Add 1mL of hexafluoroisopropanol solution to a test tube containing 2mg of peptide Aβ25-35 powder, place it on a constant temperature shaker at 25°C for 24 hours to shake and dissolve, and obtain a polypeptide solution dispersed in hexafluoroisopropanol, take 10μL Put the polypeptide solution dispersed in hexafluoroisopropanol in a 1.5mL centrifuge tube, seal the opening of the centrifuge tube with a parafilm, and pierce 4 small holes in the parafilm with a needle, and place it in a vacuum oven at 25°C Dry for 1 hour, then add 200 μL of deionized water as a solvent to the centrifuge tube, then sonicate for 3 seconds in an ultrasonic wave, shake for 3 seconds on a vortex shaker, repeat three times, and place in a constant temperature shaker at 37°C to incubate and control the incubation time For 0h, the peptide solution was finally obtained.

[0032] (2) Preparation of gold / polypeptide composite nanocatalyst:

[0033] G...

Embodiment 2

[0037] Same as Example 1, only change the incubation time in step (1) of Example 1 to be 3h and 12h, and the obtained polypeptide solutions in different forms are used to prepare catalysts according to the steps in Example 1 and carry out catalytic experiments on p-nitrophenol , the calculated catalytic rate constants are shown in Table 1. The results showed that with the increase of the incubation time, the catalytic rate constant of the gold / polypeptide composite nanocatalyst prepared from the peptide solution was larger, which could be attributed to the longer incubation time, the more fiber morphology in the peptide solution, and the prepared gold / polypeptide composite nanocatalyst. The easier the nano-catalyst is to form a network structure, the higher the number of collisions between the catalyst and p-nitrophenol.

[0038] Table 1 Effects of peptide solutions obtained at different incubation times on the prepared Au@Aβ 2535 The influence of the catalytic rate constant ...

Embodiment 3

[0041] Same as Example 1, except that the solvent added when preparing the polypeptide solution in step (1) of Example 1 is changed to PB, and the prepared polypeptide solution is then prepared for subsequent catalyst preparation. The calculated catalytic rate constants are shown in Table 2. The results showed that the catalytic rate constant of the catalyst prepared in PB was significantly larger than that of the catalyst prepared in water, which could be attributed to the Au@Aβ synthesized from the peptide solution prepared in PB. 2535Catalysts, whose particles are relatively small and have high surface activity energy, are more likely to collide with p-nitrophenol.

[0042] Table 2 The effect of peptide solutions obtained in different solvents on the prepared Au@Aβ 2535 The influence of the catalytic rate constant of the catalyst

[0043] solvent

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PUM

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Abstract

The invention provides a preparation method of inorganic biological composite nano-catalyst Au@A beta 2535. The preparation method includes steps of 1, preparing polypeptide solution dispersed by hexafluoroisopropanol; 2, preparing polypeptide powder; 3, preparing polypeptide solution; 4, preparing catalyst Au@A beta 2535. The preparation method is simple and moderate; the prepared gold / polypeptide inorganic biological composite nano-catalyst is uniform and controllable in structure, and good in catalytic effect; meanwhile, the solution and polypeptide form can be changed; different forms of catalysts with different catalytic rates can be prepared.

Description

technical field [0001] The invention relates to a preparation method of an inorganic biological composite nanocatalyst, in particular to a gold / polypeptide composite nanocatalyst (Au@Aβ) based on a polypeptide Aβ25-35 as a template 2535 ) preparation method belongs to the technical field of material preparation. Background technique [0002] Noble metal nanoparticles exhibit unique optical properties due to their surface plasmon resonance, and among many noble metal nanoparticles, gold nanoparticles have attracted much attention due to their applications in sensing, diagnosis and bio-nanocombination, and gold nanoparticles Particles are also widely used in the field of catalysis, so their preparation has been extensively studied. The preparation of gold nanoparticles is mainly divided into physical and chemical methods. In the past decades, a variety of chemical methods have been used to synthesize gold nanoparticles, however, these methods have some disadvantages: such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C07C213/02C07C215/76
CPCC07C213/02B01J31/06B01J35/393B01J35/39C07C215/76
Inventor 张杰冯永海刘磊武荣荣董明东
Owner JIANGSU UNIV
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