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Method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets

A gold nanoparticle, hexagonal technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the subsequent application obstacles of large-scale production of porous nano gold two-dimensional nanosheets, The problems of poor flake dispersibility and uneven size distribution can achieve good photothermal conversion effect, mild experimental conditions and easy operation.

Pending Publication Date: 2019-04-26
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current method for preparing porous gold nanoparticles mainly relies on the template etching method, which is cumbersome to operate and difficult to control. The gold nanosheets usually prepared by traditional methods have the disadvantages of poor dispersion and uneven size distribution. It has caused great obstacles to the large-scale production and subsequent application of porous gold nanoparticles and two-dimensional nanosheets

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  • Method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets
  • Method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets
  • Method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets

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Embodiment 1

[0033] Example 1, see Figure 1 to Figure 9 :

[0034] The invention provides a method capable of simultaneously preparing porous gold nanoparticles and hexagonal gold nanosheets, comprising the following steps:

[0035] Weigh 0.1131g of nonionic surfactant F127 and dissolve it in 45mL of deionized water (the concentration of F127 is 0.5%wt), and ultrasonically dissolve F127 completely to form a clear and transparent solution; add 0.28mL of 100mM chloroauric acid aqueous solution to the above solution, And stir to make it evenly mixed; Weigh 0.176g of ascorbic acid and dissolve it in 10mL of deionized water (the concentration of ascorbic acid is 0.1M), put the mixed solution in an oil bath at 35°C, slowly add ascorbic acid dropwise while stirring, the dropping speed is about 15min / mL to obtain a colloidal solution, the resulting product was centrifuged and washed three times with water at 5000 rpm, and the product was redispersed in deionized water after centrifugation.

[...

Embodiment 2

[0037] Example 2, see figure 1 , Figure 5 :

[0038] The invention provides a method capable of simultaneously preparing porous gold nanoparticles and hexagonal gold nanosheets, comprising the following steps:

[0039]Weigh 0.2262g of nonionic surfactant F127 and dissolve it in 45mL of deionized water (the concentration of F127 is 1%wt), ultrasonically dissolve F127 completely to form a clear and transparent solution; add 0.28mL of 100mM chloroauric acid aqueous solution to the above solution, And stir to make it evenly mixed; Weigh 0.176g of ascorbic acid and dissolve it in 10mL of deionized water (the concentration of ascorbic acid is 0.1M), put the mixed solution in an oil bath at 35°C, slowly add ascorbic acid dropwise while stirring, the dropping speed is about 15min / mL to obtain a colloidal solution, the resulting product was centrifuged and washed three times with water at 5000 rpm, and the product was redispersed in deionized water after centrifugation.

[0040] T...

Embodiment 3

[0042] The invention provides a method capable of simultaneously preparing porous gold nanoparticles and hexagonal gold nanosheets, comprising the following steps:

[0043] Weigh 0.2262g of nonionic surfactant F127 and dissolve it in 45mL of deionized water (the concentration of F127 is 1%wt), ultrasonically dissolve F127 completely to form a clear and transparent solution; add 0.28mL of 100mM chloroauric acid aqueous solution to the above solution, And stir to make it evenly mixed; Weigh 0.176g of ascorbic acid and dissolve it in 10mL of deionized water (the concentration of ascorbic acid is 0.1M), put the mixed solution in an oil bath at 50°C, slowly add ascorbic acid dropwise while stirring, the dropping speed is about 15min / mL to obtain a colloidal solution, the resulting product was centrifuged and washed three times with water at 5000 rpm, and the product was redispersed in deionized water after centrifugation.

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Abstract

The invention provides a method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets. The method comprises the following steps that poloxamer (F127) is added in ultrapure water, ultrasonic dispersion is conducted, and a transparent and clear micellar solution is formed; a chloroauric acid solution is added in the micellar solution, uniform stirring and mixing areconducted, a reaction precursor solution is formed, and obtained solid particles are the porous gold nano particles; and an ascorbic acid solution is used for reducing of the precursor solution, afterthe reaction is complete, centrifugal separation is conducted, washing is conducted, and the hexagonal gold nano sheets are obtained. The method has the advantages that operation is simple and convenient, experiment conditions are moderate, and experiment reagents are environment-friendly; the prepared porous gold nano particles have the large specific surface area and can be applied to the fieldof catalysis and medicine carrying; and the regular hexagon gold nano sheets have good absorption performance for near-infrared light and can be widely applied to the fields of nano devices, biomedicine, molecular recognition, photo-thermal therapy and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterial manufacturing, in particular to a method for simultaneously preparing porous gold nanometers and hexagonal gold nanosheets with absorption properties in the near-infrared band. Background technique [0002] With the development of science and technology, more and more diseases have been conquered by humans, but the treatment of malignant tumors is still a world-class problem. Although the existing detection methods and treatment techniques have made significant progress, the morbidity and mortality of malignant tumors are still high. Common methods for treating tumors include surgical treatment, chemotherapy and radiotherapy, but these methods have great side effects on the human body. In contrast, photothermal therapy, which has emerged recently, has attracted the attention of many medical workers due to its advantages of less invasiveness, strong pertinence (light area), and small side eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0553B22F1/07B22F1/054
Inventor 梁峰吴慧颖曾艳
Owner WUHAN UNIV OF SCI & TECH
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