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Platinum-cobalt nano-alloy mimic enzyme and preparing method and purpose thereof

A cobalt nanometer and enzyme-mimicking technology, which is applied in nanotechnology, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as single function, cumbersome preparation procedures, and high cost, and achieve high chemical efficiency. Good stability, repeatability, and low material cost

Active Publication Date: 2015-04-29
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing bimetallic nanomimetic enzymes are all composed of two noble metal elements (gold, palladium and platinum), which are relatively expensive and have a single function, and the preparation procedures of most bimetallic nanomimetic enzymes are cumbersome.

Method used

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  • Platinum-cobalt nano-alloy mimic enzyme and preparing method and purpose thereof
  • Platinum-cobalt nano-alloy mimic enzyme and preparing method and purpose thereof
  • Platinum-cobalt nano-alloy mimic enzyme and preparing method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0046] Implementation method: Dissolve chloroplatinic acid and cobalt acetate in ethylene glycol, add polyethylene glycol and aniline, stir well and place in a hydrothermal kettle, wherein the concentration of chloroplatinic acid is 0.001mol / L, and the concentration of cobalt acetate is 0.002 mol / L, the concentration of polyethylene glycol is 0.0025mol / L, and the concentration of aniline is 0.016mol / L. The reaction was heated at 150°C for 12h. After the reaction, cool down to room temperature, wash the reactant with acetone and ethanol, and centrifuge to remove the supernatant to obtain the platinum-cobalt nano-alloy.

Embodiment 3

[0048] Implementation method: Dissolve platinum acetylacetonate and cobalt chloride in benzyl alcohol, add polyvinylpyrrolidone and benzoic acid, stir well and place in a hydrothermal kettle, wherein the concentration of platinum acetylacetonate is 0.0005mol / L, and the concentration of cobalt chloride is 0.001mol / L, the concentration of polyvinylpyrrolidone is 0.00025mol / L, and the concentration of benzoic acid is 0.016mol / L. The reaction was heated at 200° C. for 1 h. After the reaction, cool down to room temperature, wash the reactant with acetone and ethanol, and centrifuge to remove the supernatant to obtain the platinum-cobalt nano-alloy.

Embodiment 4

[0050] Implementation method: Dissolve chloroplatinic acid and cobalt nitrate in diethylene glycol, add polyvinylpyrrolidone and benzaldehyde, stir well and place in a hydrothermal kettle, wherein the concentration of platinum acetylacetonate is 0.005mol / L, cobalt ketone nitrate The concentration is 0.01mol / L, the concentration of polyvinylpyrrolidone is 0.0025mol / L, and the concentration of benzaldehyde is 0.16mol / L. The reaction was heated at 120°C for 4h. After the reaction, cool down to room temperature, wash the reactant with acetone and ethanol, and centrifuge to remove the supernatant to obtain the platinum-cobalt nano-alloy.

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Abstract

The invention provides a platinum-cobalt nano-alloy mimic enzyme. The structure of the platinum-cobalt nano-alloy mimic enzyme is formed by approximately spherical platinum-cobalt alloy nano particles; the preparing method of the platinum-cobalt nano-alloy mimic enzyme comprises the steps of using platinum salt and cobalt salt as metal precursors; dissolving the two precursors in an organic solvent; adding a surface active agent and a nucleation inhibitor in the organic solvent; carrying out heating reaction in a hydrothermal reactor after the organic solvent is uniformly stirred. According to the platinum-cobalt nano-alloy mimic enzyme provided by the invention, the platinum-cobalt nano-alloy mimic enzyme is prepared through a one-step reduction method, the preparing technology is simple, the repeatability is good, the stability is good, the cost is low, a catalytic activity which is similar to an oxide enzyme and peroxidase is showed, and the platinum-cobalt nano-alloy mimic enzyme can be used as a new oxide enzyme mimic enzyme and a new peroxidase mimic enzyme for replacing the oxide enzyme and the peroxidase to be applied to the fields of immunoassay, biological detection, clinical diagnosis and the like.

Description

technical field [0001] The invention belongs to the field of catalytic materials, in particular to a platinum-cobalt nano-alloy simulated enzyme and its preparation method and application. Background technique [0002] Natural enzymes have important applications in the fields of biology, chemistry, agriculture and food processing because of their high selectivity and high efficiency of catalytic activity. However, most natural enzymes have high purification costs and are easily denatured and inactivated by experimental conditions such as temperature and pH, resulting in reduced stability, which greatly limits the scope of application of enzymes. Therefore, it is necessary to develop mimetic enzymes with enzymatic characteristics and more stable structures. [0003] Compared with natural enzymes, nanomaterials have the advantages of low cost, adjustable catalytic activity, high stability, and easy handling and storage. Various nanomaterials with peroxidase and / or oxidase pr...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B01J23/89
Inventor 蔡双飞乞萃杨蓉王琛
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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