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Method for preparing Au nanoflower through microwave auxiliary method and Au nanoflower

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

Active Publication Date: 2018-09-07
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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  • Method for preparing Au nanoflower through microwave auxiliary method and Au nanoflower
  • Method for preparing Au nanoflower through microwave auxiliary method and Au nanoflower
  • Method for preparing Au nanoflower through microwave auxiliary method and Au nanoflower

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for microwave-assisted preparation of Au nanoflowers, comprising the following steps:

[0034] Step 1, add a certain concentration of HAuCl4 solution in the round bottom flask, then add octadecylamine, KBr and PVP to form mixed solution a;

[0035] Step 2, adding reducing agent tetraethylene glycol (TEG) into mixed solution a, mixing and stirring to obtain mixed solution b;

[0036] Step 3, placing the mixed solution b in a microwave reactor for heating and reacting;

[0037] Step 4, the product of step 3 is treated with acetone to obtain Au nanoflowers;

[0038] Specifically, in the step 1, 5 mL of HAuCl with a concentration of 20 mM was configured 4 solution.

[0039] Further, in the step 1, 2ml of octadecylamine solution with a concentration of 1M was added.

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

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

[0042] Further, 20 mL of TEG with a concentration of 0.4 M was added in the se...

Embodiment 2

[0046] A method for microwave-assisted preparation of Au nanoflowers, comprising the following steps:

[0047] Step 1, configure 5 mL of HAuCl with a concentration of 20 mM in a round bottom flask 4 solution; then add 2ml of octadecylamine solution with a concentration of 5M, 20mg of KBr; 50mg of PVP to form a mixed solution a;

[0048] Step 2: Add 20 mL of TEG with a concentration of 0.4M to the mixed solution a, mix and stir to obtain the mixed solution b;

[0049] Step 3, placing the mixed solution b in a microwave reactor with a microwave frequency of 890-2400 MHz and heating it to 180° C., and keeping it for 1 minute for heating and reaction;

[0050] In step 4, the product of step 3 is washed with acetone for 3 to 5 times to obtain Au nanoflowers.

[0051] Such as Figure 4 Shown is the scanning electron microscope image of the Au nanoflowers prepared in this example. The figure shows that the size of the Au nanoflowers is 0.73 μm-1.1 μm, the length of the petals is 0...

Embodiment 3

[0053] A method for microwave-assisted preparation of Au nanoflowers, comprising the following steps:

[0054] Step 1, configure 5 mL of HAuCl with a concentration of 20 mM in a round bottom flask 4 solution; then add 2ml concentration of 1M octadecylamine solution, 20mg of KBr; 100mg of PVP to form a mixed solution a;

[0055] Step 2: Add 20 mL of TEG with a concentration of 0.4M to the mixed solution a, mix and stir to obtain the mixed solution b;

[0056] Step 3, place the mixed solution b in a microwave reactor with a microwave frequency of 890-2400MHz and heat it to 180°C, and keep it for 5 minutes for heating and reaction;

[0057] In step 4, the product of step 3 is washed with acetone for 3 to 5 times to obtain Au nanoflowers.

[0058] Such as Figure 5 Shown is the transmission electron microscope image of the Au nanoflowers prepared in this example. It can be seen from the figure that the size of the Au nanoflowers is 1.68 μm-2 μm, the length of the petals is 0.46 μ...

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Abstract

The invention relates to the technical field of nanometer material preparation, in particular to a method for preparing an Au nanoflower through a microwave auxiliary method and the Au nanoflower. Themethod comprises the following steps that 1, a HAuCl4 solution of a certain concentration is added into a round-bottom flask, and then octadecylamine, KBr and PVP are added to form a mixed solution a; 2, tetraethylene glycol (TEG) as a reducing agent is added into the mixed solution a to be mixed and stirred to form a mixed solution b; 3, the mixed solution b is put into a microwave reactor to besubjected to a heating reaction; and 4, the product obtained in the step 3 is processed by acetone to obtain the Au nanoflower. The microwave auxiliary method is adopted, the method is novel, and theAu nanoflower which is single in morphology, good in dispersity and uniform in size is prepared.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a microwave-assisted method for preparing Au nanoflowers. Background technique [0002] Microwave is an electromagnetic wave between radio waves and infrared rays, with a wavelength range of 1mm to 1m and a frequency range of 0.3 to 300GHz. It has the characteristics of short wavelength, high frequency, and strong penetrating ability, and obeys the law of light. In 1986, Gedy and others carried out chemical reactions such as esterification and hydrolysis in a microwave oven, and used microwaves for the synthesis of materials. Since then, microwave technology has gradually penetrated into various fields of chemistry and has become a new heat source. The principle of microwave heating is to use the action of microwave electromagnetic field to make polar molecules change from the original thermal motion state to alternate orientation according to the di...

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 程琳鲍康馨曹睿李小云
Owner ZHEJIANG SCI-TECH UNIV
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