Carbon nanotube/ dendritic compound/ nanoparticle composite material and preparation method thereof

A carbon nanotube and nanoparticle technology is applied in the field of nanocomposite materials to achieve the effects of good stability, easy availability of raw materials and good water solubility

Inactive Publication Date: 2013-03-06
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of carbon nanotube / dendrimer / nanoparticle composites using dendrimers as templates.

Method used

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  • Carbon nanotube/ dendritic compound/ nanoparticle composite material and preparation method thereof
  • Carbon nanotube/ dendritic compound/ nanoparticle composite material and preparation method thereof
  • Carbon nanotube/ dendritic compound/ nanoparticle composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a) Prepare an aqueous solution of carbon nanotubes: place 5 mg of acid-treated multi-walled carbon nanotubes in 50 mL of distilled water, and ultrasonically disperse at 20° C. for 5 minutes;

[0039] b) At 20°C, add 3mL of 0.2g PAMAM methanol solution dropwise to the carbon nanotube aqueous solution prepared in step a), stir at room temperature for 2 hours, centrifuge to remove the supernatant, wash with methanol twice, and finally centrifuge The covalently modified carbon nanotubes of PAMAM were redispersed in 30mL of methanol;

[0040] c) At 20°C, add 10mL of 0.001mol / L methanol solution of copper acetate into the methanol solution of carbon nanotubes covalently modified with PAMAM prepared in step b), stir and react for 2 hours, press the formed metal sulfide Add 10mL of 0.001mol / L methanol solution of sodium sulfide dropwise to the stoichiometric ratio, then stir and react for 2 hours;

[0041] d) The supernatant was removed by centrifugation, and the centrifuged s...

Embodiment 2

[0048] a) Prepare an aqueous solution of carbon nanotubes: place 5 mg of acid-treated multi-walled carbon nanotubes in 50 mL of distilled water, and ultrasonically disperse at 25° C. for 5 minutes;

[0049] b) Ultrasonicate 3mL of 0.2g PAMAM methanol solution at 25°C for 2 hours, then add dropwise to the carbon nanotube aqueous solution prepared in step a), first stir at room temperature for 2 hours, centrifuge to remove the supernatant, wash with methanol twice , and finally redisperse the centrifuged covalently modified PAMAM carbon nanotubes in 30mL of methanol;

[0050] c) At 25°C, add 0.0005 mol / L silver nitrate methanol solution into the carbon nanotube methanol solution covalently modified with PAMAM prepared in step b), stir and react for 2 hours, according to the chemical composition of the formed metal sulfide Add 10mL of 0.001mol / L methanol solution of sodium sulfide drop by drop, and then stir for 2 hours;

[0051] d) The supernatant was removed by centrifugation,...

Embodiment 3

[0056] a) Prepare an aqueous solution of carbon nanotubes: place 5 mg of acid-treated multi-walled carbon nanotubes in 50 mL of distilled water, and ultrasonically disperse at 20° C. for 5 minutes;

[0057] b) At 20°C, add 3mL of 0.2g PAMAM methanol solution dropwise to the carbon nanotube aqueous solution prepared in step a), first stir at room temperature for 2 hours, centrifuge to remove the supernatant, wash with methanol twice, and finally centrifuge The final covalently modified PAMAM carbon nanotubes were redispersed in 30mL methanol;

[0058] c) At 20°C, add 0.0005mol / L methanol solution of metal silver nitrate to the methanol solution of carbon nanotubes covalently modified with PAMAM prepared in step b), stir and react for 2 hours, then add 20mL of 0.1mol / L dropwise Sodium borohydride methanol solution, the metal silver ion in the solution is reduced to elemental silver;

[0059] d) The supernatant was removed by centrifugation, and the centrifuged solid was washed ...

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Abstract

The invention discloses a carbon nanotube / dendritic compound / nanoparticle composite material and a preparation method thereof. The material is prepared by coating multi-walled carbon nanotubes (NWCNTs) orderly with a dendritic compound polyamidoamine (PAMAM) and metal sulfides or metal nanoparticles from interior to exterior. The PAMAM modifies the carbon nanotubes through a covalent bond, and the metal sulfides or metal nanoparticles modify the carbon nanotubes in situ through self-assembly. The carbon nanotubes, the dendritic compound and nanoparticles have strong interactions. The carbonnanotubes modified in the way have better dispersibility and optical limiting property than corresponding unmodified carbon nanotubes. In addition, the preparation method of the invention has the advantages of simple operation, easily available raw material, low cost and the like, thus suitable for industrial production.

Description

technical field [0001] The invention relates to a carbon nanotube / dendritic compound / nanoparticle composite material and a preparation method of the composite material, belonging to the technical field of nanocomposite materials. Background technique [0002] Carbon nanotubes have been a research hotspot at home and abroad because of their excellent and unique mechanical, thermal and electrical properties. In recent years, the coating of one-dimensional nanocrystals on the surface of carbon nanotubes has become a hot research field. Studies have shown that a layer of semiconductor nanocrystals is uniformly coated on the surface of carbon nanotubes. When the grain size reaches the nanoscale, it has many excellent characteristics such as quantum size effect and easy photoexcitation. The composite material is expected to be widely used. Such as optical fiber communication, light-emitting diodes and photovoltaic cells, etc. [0003] The key to preparing carbon nanotube / nanopar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/00C01B31/02B82Y30/00
Inventor 吴惠霞刘苗苗杨仕平
Owner SHANGHAI NORMAL UNIVERSITY
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