Gold-core/platinum-shell nano bar analogue enzyme solution and preparation method thereof

A technology of gold nanorods and nanorods, which is applied in the field of nanorod simulated enzyme solution and its preparation, to achieve the effects of mild reaction conditions, simple operation and high repeatability

Active Publication Date: 2011-04-20
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, platinum nanoparticles have oxidase-like catalytic characteristics an

Method used

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  • Gold-core/platinum-shell nano bar analogue enzyme solution and preparation method thereof
  • Gold-core/platinum-shell nano bar analogue enzyme solution and preparation method thereof
  • Gold-core/platinum-shell nano bar analogue enzyme solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of a gold nucleus / platinum nano -nanos analog enzyme solution, the preparation steps are as follows:

[0035] 1. Preparation of gold crystal solution

[0036]Take a 7.5ml concentration of 0.1m hexishlanelxyl tricehydramium bromide water solution, add a tetrachloride solution with a 100.4 μl concentration of 24.7mm to it, and then dilute the volume to 9.4ml after mixing.Add a sodium -hydride aquatic solution with a 0.6ml concentration of 0.01m (temporarily prepared and placed in ice water before use) to make the first mixed solution.The amount of material ratio of tetrachloride and sodium sodium -hydride = 0.75: 0.0025: 0.006; stop after stirring for three minutes, and settle for 2 hours to obtain a gold crystal solution containing gold crystal species.It is 0.25mm;

[0037] 2. Preparation nanoscope solution

[0038] Take a hexishllar bromide aquatic solution with a 100ml concentration of 0.1m, add a 2.05ml concentration of 24.7mm tetrachloride solution to it. Th...

Embodiment 2

[0049] Preparation of a gold nucleus / platinum nano -nanos analog enzyme solution, the preparation steps are as follows:

[0050] 1. Preparation of gold crystal solution:

[0051] Take a 7.5ml concentration of 0.1m hexishlanelxyl tricehydramium bromide water solution, add a tetrachloride solution with a 100.4 μl concentration of 24.7mm to it, and then dilute the volume to 9.4ml after mixing.Add a sodium -hydride aquatic solution with a 0.6ml concentration of 0.01m (temporarily prepared and placed in ice water before use) to make the first mixed solution.The amount of material ratio of tetrachloride and sodium sodium hydride = 0.75: 0.0025: 0.006; stop after stirring for three minutes, and set it for 3 hours to obtain the gold crystal solution containing gold crystal species.It is 0.25mm;

[0052] 2. Preparation nanoscope solution:

[0053] Take a hexishllar bromide aquatic solution with a 100ml concentration of 0.1m, add a 2.05ml concentration of 24.7mm tetrachloride solution to it...

Embodiment 3

[0064] Preparation of a gold nucleus / platinum nano -nanos analog enzyme solution, the preparation steps are as follows:

[0065] 1. Preparation of gold crystal solution:

[0066] Take a 7.5ml concentration of 0.1m hexishlanelxyl tricehydramium bromide water solution, add a tetrachloride solution with a 100.4 μl concentration of 24.7mm to it, and then dilute the volume to 9.4ml after mixing.Add a sodium -hydride aquatic solution with a 0.6ml concentration of 0.01m (temporarily prepared and placed in ice water before use) to make the first mixed solution.The amount of material ratio of tetrachloride and sodium boroside = 0.75: 0.0025: 0.006; stop after stirring for three minutes, and settle for 5 hours to obtain a gold crystal solution containing gold crystal species.It is 0.25mm;

[0067] 2. Preparation nanoscope solution:

[0068] Take a hexishllar bromide aquatic solution with a 100ml concentration of 0.1m, add a 2.05ml concentration of 24.7mm tetrachloride solution to it. The 1m...

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Abstract

The invention relates to gold-core/platinum-shell nano bar analogue enzyme solution, which has a gold-core/platinum-shell structure consisting of a cylindrical gold nano bar inner core and an island-shaped polyporous platinum-shell layer coated on the outer surface of the cylindrical gold nano bar inner core. The preparation method comprises the following steps of: 1) preparing gold crystal seed solution containing 0.25 mM of gold; 2) preparing gold nano bar solution containing a gold nano bar; 3) purifying the gold nano bar solution until the gold nano bar content is 0.5 mM; 4) preparing thegold-core/platinum-shell nano bar analogue enzyme solution; 5) modifying the gold-core/platinum-shell nano bar analogue enzyme solution; and 6) purifying the modified gold-core/platinum-shell nano bar analogue enzyme solution. Gold-core/platinum-shell nano bar analogue enzyme prepared by a method combining seed modulation with post-reduction has catalytic activity similar to the catalytic activity of peroxidase and the catalytic activity of peroxidase; furthermore, the method is simple, and the solution is cheap, effective and environmentally-friendly; and the gold-core/platinum-shell nano bar analogue enzyme solution can serve as novel peroxide analogue enzyme or oxide analogue enzyme.

Description

Technical field [0001] The present invention involves a nano -rod analog enzyme solution and its preparation method with a gold nucleus / platinum shell structure. It also has catalytic activity similar to peroxide enzymes and oxidase -like catalytic, andUsed as an analog enzyme for natural oxidase and peroxidase. Background technique [0002] Natural enzymes, as a catalyst with high efficiency and high selectivity in biochemicals, play an important role in the field of biochemistry.Enzymes are easily affected by many physical and chemical factors during storage, transportation, and use, such as temperature and pH values, and degeneration.In addition, the price of enzymes is expensive and cumbersome.These are limited to its application scope.Therefore, the development of enzyme activity characteristics and more stable simulation enzymes than natural enzymes is extremely important in the chemical industry, agriculture, and biomedical fields.So far, scholars of various countries have...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J23/42B01J37/02B01J35/00B22F1/02B22F9/24
Inventor 何伟伟吴晓春
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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