A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers

A microwave-assisted, nano-flower technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve good monodispersity, uniform particles, and high energy efficiency

Active Publication Date: 2021-09-07
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current preparation methods of noble metal nanoparticles are mainly solvothermal method, electrochemical method, oil bath method, etc., but there are few synthetic schemes for preparing Au nanomaterials by microwave technology in the prior art

Method used

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  • A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers
  • A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers
  • A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:

[0034] A step of adding a certain concentration of HAuCl4 round bottom flask was added followed octadecylamine, and PVP KBr form a mixed solution a;

[0035] Step two, the reducing agent is added in a mixed solution of tetraethylene glycol (the TEG), mixed and stirred to obtain a mixed solution B;

[0036] Step three, the mixed solution was placed in a microwave reactor b heat the reaction;

[0037] Step 4 The product of Step III is treated with acetone to give after Au nanoparticles flowers;

[0038] Specifically, a configuration step 5mL concentration of HAuCl 20mM 4 Solution.

[0039] Further, the step of adding a concentration of 2ml of a 1M solution of octadecylamine.

[0040] Further, a step of KBr was added 20mg.

[0041] Further, the amount of PVP in a step 50mg.

[0042] Further, the step II was added 20mL of TEG 0.4M concentration.

[0043] Further, the mixed solution...

Embodiment 2

[0046] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:

[0047] A step disposed in a round-bottomed flask 5mL concentration of the HAuCl 20mM 4 Solution; followed by the addition 2ml 5M concentration solution of octadecylamine, 20mg of KBr; 50mg PVP formed a mixed solution of a;

[0048] Step two, the concentration of the mixed solution was added 20mL for a TEG 0.4M, and kneading to obtain a mixed solution B;

[0049] Step three, the mixed solution was placed in a microwave reactor b microwave frequency of 890 ~ ​​2400MHz microwave heated to a temperature of 180 ℃, heating the reaction held for 1min;

[0050] Step 4 The product of Step III was washed with acetone to give Au nanoflowers after 3-5 treatments.

[0051] like Figure 4 Shown, Au nanoflowers a scanning electron microscope view of the present embodiment was prepared, showing the size of Au nanoflowers 0.73μm-1.1μm, wherein the length of the petals is 0.34 m, the width of the...

Embodiment 3

[0053] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:

[0054] A step disposed in a round-bottomed flask 5mL concentration of the HAuCl 20mM 4 Solution; followed by the addition 2ml 1M concentration solution of octadecylamine, 20mg of KBr; 100mg PVP formed a mixed solution of a;

[0055] Step two, the concentration of the mixed solution was added 20mL for a TEG 0.4M, and kneading to obtain a mixed solution B;

[0056] Step three, the mixed solution was placed in a microwave reactor b microwave frequency of 890 ~ ​​2400MHz microwave heated to a temperature of 180 ℃, heating the reaction maintained for 5min;

[0057] Step 4 The product of Step III was washed with acetone to give Au nanoflowers after 3-5 treatments.

[0058] like Figure 5 Shown, Au nanoflowers transmission electron microscopy were prepared FIG embodiment of the present embodiment, it can be seen from the figure, Au nanoflowers size of 1.68μm-2μm, petal length of 0.46 m,...

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Abstract

The present invention relates to the technical field of nanomaterial preparation, in particular to a microwave-assisted method for preparing Au nanoflowers and Au nanoflowers, comprising the following steps: step 1, adding a certain concentration of HAuCl into a round bottom flask 4 solution, followed by adding octadecylamine, KBr and PVP to form a mixed solution a; step 2, adding the reducing agent tetraethylene glycol (TEG) to the mixed solution a, mixing and stirring to obtain a mixed solution b; step 3, mixing the mixed solution b placed in a microwave reactor to heat the reaction; Step 4, the product of Step 3 is treated with acetone to obtain Au nanoflowers. The invention adopts a microwave-assisted method, the method is novel, and Au nanoflowers with single appearance, good dispersion and uniform size are prepared.

Description

Technical field [0001] The present invention belongs to the technical field of nanomaterials prepared, particularly relates to a method for microwave-assisted preparation of Au nanoflowers. Background technique [0002] Microwave is an electromagnetic wave between radio waves and infrared range, the wavelength range of 1mm ~ 1m, the frequency range of 0.3 ~ 300GHz, having a short wavelength, high frequency, penetrating ability and other characteristics, compliance with laws of light. 1986, etc. Gedy esterification, hydrolysis and other chemical reactions in a microwave oven, a microwave for synthetic materials. Since then, the gradual penetration of microwave technology will be applied to all areas of chemistry, a new heat source. Principle is to use the microwave heating effect of microwave electromagnetic field so that polar molecules from the original direction in accordance with the thermal state of the steering motion of the electromagnetic field are arranged in alternating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0553B22F1/07B22F1/054
Inventor 程琳鲍康馨曹睿李小云
Owner ZHEJIANG SCI-TECH UNIV
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