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Noble metal nanostructure as well as preparation method and application thereof

A nanostructure and noble metal technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of large particle size and uneven size, achieve uniform size and shape, and prepare The effect of simple process and pure gold nanostructure system

Active Publication Date: 2015-07-15
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, there are still some problems in the preparation of noble metal nanostructures by laser liquid phase ablation, such as the prepared particles have large particle sizes and uneven sizes.

Method used

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  • Noble metal nanostructure as well as preparation method and application thereof
  • Noble metal nanostructure as well as preparation method and application thereof
  • Noble metal nanostructure as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0051] The method for preparing gold nanostructure provided by the invention comprises the following steps:

[0052] (1) Provide a precious metal sheet, and perform mechanical polishing on it, and place it in a reaction vessel;

[0053] (2) Inject the nano-graphene oxide solution into the reaction vessel, and the liquid level of the solution is not over the precious metal sheet;

[0054](3) The pulsed laser passes through the reaction vessel and the nano-graphene oxide solution, focuses on the surface of the precious metal sheet, and ablate the precious metal sheet;

[0055] (4) The solution in the reaction vessel is separated through a microporous membrane, and then the nanometer graphene oxide particles are removed by dialysis through a dialysis bag.

[0056] in, figure 1 A schematic diagram of obtaining noble metal nanostructures by liquid-phase pulsed laser ablation under the action of a nano-graphene oxide seed promoter provided by the present invention.

Embodiment 1

[0058] A method for preparing a gold nanostructure, comprising the steps of:

[0059] (1) Provide a gold flake, perform mechanical polishing, and place it in a reaction vessel; the purity of the gold flake is ≥99.99wt%; the thickness of the gold flake is 1mm;

[0060] (2) injecting the nano graphene oxide solution that concentration is 200mg / L into the reaction vessel, and the liquid level has not crossed the gold flake; the nano graphene oxide is a seed promoter; the particle diameter of the nano graphene oxide is 1~ 2nm;

[0061] (3) Provide a pulse laser generating device, guide the laser generated by it into the reaction container through the optical path conversion device, and focus on the surface of the gold sheet, and ablate the gold sheet;

[0062] The pulsed laser generating device is a Nd:YAG pulsed laser, the excitation wavelength is 532nm, and the pulse frequency is 10Hz; the laser energy is adjusted by adjusting the voltage of the pulsed laser generating device, ...

Embodiment 2

[0068] A method for preparing a gold nanostructure, comprising the steps of:

[0069] (1) Provide a gold flake, perform mechanical polishing, and place it in a reaction vessel; the purity of the gold flake is ≥99.99wt%; the thickness of the gold flake is 1mm;

[0070] (2) injecting the nano-graphene oxide solution that concentration is 40mg / L into reaction vessel, and the liquid level has not crossed described gold flake; Described nano-graphene oxide is seed promoter; The particle diameter of nano-graphene oxide is 1~ 2nm;

[0071] (3) Provide a pulse laser generating device, guide the laser generated by it into the reaction container through the optical path conversion device, and focus on the surface of the gold sheet, and ablate the gold sheet;

[0072] The pulsed laser generating device is a Nd:YAG pulsed laser, the excitation wavelength is 532nm, and the pulse frequency is 10Hz; the laser energy is adjusted by adjusting the voltage of the pulsed laser generating device,...

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Abstract

The invention relates to a preparation method of a noble metal nanostructure. The preparation method comprises the following steps: putting a noble metal sheet in a solution containing nano graphene oxide, and carrying out ablation on the noble metal sheet by using pulse laser to obtain the noble metal nanostructure. The noble metal nanostructure prepared by using the preparation method is more uniform in size and appearance and controllable in grain size; with the increase of the concentration of a nano graphene oxide seed promoter, the size of a gold nanostructure becomes smaller and smaller and the dispersity becomes better and better; the prepared gold nanostructure system is pure, free of chemical residual and good in biocompatibility and lays a favorable foundation on the subsequent study in the biomedical field; the preparation method is simple and easily controllable in conditions.

Description

technical field [0001] The invention belongs to the field of preparation of nanomaterials, in particular to a noble metal nanostructure, its preparation method and application, and further relates to a preparation method of a noble metal nanostructure mediated by a seed promoter using nano-graphene oxide as a seed promoter. The prepared noble metal nanostructure and its application. Background technique [0002] Due to the small size effect, surface effect and quantum effect of nanomaterials, as well as the unique properties of nanostructures such as sound, light, electricity, heat, and magnetism, the design, assembly and application of nanomaterials have become important fields in the fields of chemistry, materials and biomedicine. research hotspots. [0003] As an important nanomaterial, the application of precious metal nanostructures can be traced back to the middle of the 17th century. They are often used as pigments and medicines, such as making ruby ​​glass and color...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00B82Y30/00B82Y40/00
Inventor 杨琳韩秋森王新环杨蓉王琛
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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