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A kind of precious metal oxide nanocomposite material, its preparation method and application

A nano-composite material, precious metal oxide technology, applied in chemical instruments and methods, carbon compounds, ruthenium/rhodium/palladium/osmium/iridium/platinum oxide/hydroxide, etc. Limiting the application of biological enzymes, difficulty in purification and storage, etc., to achieve the effect of simple and rapid preparation method, inhibition of the formation of nanoparticles, and stable properties

Active Publication Date: 2021-01-15
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of biocatalysis, biological enzymes are favored due to their high efficiency, specificity, and mild reaction conditions, but they are very sensitive to environmental changes, difficult to purify and store, and expensive. Therefore, the development of nanomaterials with biological enzyme activity has become one of the important research directions in many fields such as biosensing, biodetection, clinical diagnosis, and environmental monitoring.
CN 104772465 A discloses a noble metal nanostructure and its preparation method. The noble metal sheet is placed in a solution containing nano-graphene oxide, and a pulsed laser is used to ablate the noble metal sheet to obtain a noble metal nanostructure, but the prepared nanomaterial has no The structure between its components is clear, and there is no specific application

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  • A kind of precious metal oxide nanocomposite material, its preparation method and application
  • A kind of precious metal oxide nanocomposite material, its preparation method and application
  • A kind of precious metal oxide nanocomposite material, its preparation method and application

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preparation example Construction

[0064] The specific embodiment part of the present invention provides a preparation method and application of a noble metal oxide nanocomposite material. The method includes the following steps:

[0065] (1) Adding the noble metal to the solvent, ablation with a pulsed laser to obtain a nano-dispersion comprising the noble metal oxide;

[0066] (2) Mixing the nano-dispersion liquid obtained in step (1) with the carrier dispersion liquid, standing still, drying and oxidizing after solid-liquid separation, to obtain a noble metal oxide nano-composite material.

Embodiment 1

[0069] This embodiment provides a method for preparing a noble metal oxide nanocomposite material, the method comprising the following steps:

[0070] (1) Put the precious metal iridium target into the bottom of the colorimetric tube, add 6mL of ethanol, focus the pulsed laser with energy of 80mJ, focal length of 77mm, and wavelength of 532nm on the surface of the target, and laser ablate it under the action of 300W ultrasound for 10min. Obtaining a nano-dispersion comprising iridium dioxide;

[0071] (2) After mixing the nano-dispersion liquid obtained in step (1) with 1 mL of polyacrylimide-modified graphene oxide dispersion liquid with a concentration of 1000 μg / mL, let it stand at 20 ° C for 4 h, centrifuge, and place in an air atmosphere Dry at 60°C to fully oxidize metal iridium to obtain iridium dioxide / graphene oxide (IrO 2 / GO) nanocomposites.

[0072] The iridium dioxide nanoparticles that step (1) obtains and the IrO that step (2) makes 2 / GO nanocomposites were ...

Embodiment 2

[0076] This embodiment provides a method for preparing a noble metal oxide nanocomposite material, the method comprising the following steps:

[0077] (1) Put the precious metal iridium target into the bottom of the colorimetric tube, add 6mL of acetone, focus the pulsed laser with energy of 120mJ, focal length of 250mm, and wavelength of 532nm on the surface of the target, and laser ablate it under the action of 400W ultrasound for 5min, Obtaining a nano-dispersion comprising iridium dioxide;

[0078] (2) After mixing the nano-dispersion liquid obtained in step (1) with 1 mL of polyacrylimide-modified graphene oxide dispersion liquid with a concentration of 1000 μg / mL, let it stand at 30 ° C for 6 h, centrifuge, and then Dry at 80°C to fully oxidize metal iridium to obtain iridium dioxide / graphene oxide (IrO 2 / GO) nanocomposites.

[0079] The prepared IrO 2 / GO nanocomposites were characterized by TEM, and the results are as follows Figure 5 shown.

[0080] The prepare...

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Abstract

The invention provides a noble metal oxide nanocomposite material and a preparation method and use thereof. The preparation method comprises: adding a noble metal into a solvent, carrying out ablationwith pulsed laser to obtain a nano-dispersion liquid containing a noble metal oxide, mixing the nano-dispersion liquid and a carrier dispersion liquid, standing the mixed solution, carrying out solid-liquid separation and then carrying out drying oxidization. The noble metal oxide nanoparticles are prepared through the pulsed laser ablation method. The nanoparticles have even particle sizes and the nanoparticles are compounded to form the nanocomposite material. The preparation method is simple and fast and is environmentally friendly and efficient. The nanocomposite material has peroxide mimic enzyme characters, can replace natural peroxidase and can be used in the fields of biological detection and clinical diagnosis.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a noble metal oxide nanocomposite material, its preparation method and application, in particular to a noble metal oxide nanocomposite material prepared by a liquid phase pulse laser ablation method and its application. Background technique [0002] In recent years, nanomaterials and technology have developed rapidly. Due to the small size effect, surface effect, and quantum effect of nanomaterials, they have shown good application prospects in many fields such as electronics, optics, and biomedicine. Frontier research fields of science and technology. At present, the preparation of nanomaterials is mainly based on liquid-phase chemical methods (such as precipitation, solvothermal, chemical reduction, etc.), which generally have problems such as high pollution, high energy consumption, and complicated preparation processes. [0003] Liquid phase pulsed laser ablat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C01G55/00
CPCC01G55/004C01P2004/04C01P2004/80C01B32/198
Inventor 杨蓉刘学良韩秋森王新环王琛
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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