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Method for adjusting morphology and size of tungsten oxide by using carbon nanotube

A carbon nanotube and tungsten oxide technology, applied in the direction of tungsten oxide/tungsten hydroxide, nanotechnology, nanotechnology, etc., can solve the problem of less nanomaterials with different morphologies, and achieve easy availability of raw materials, wide application prospects, and preparation technology. simple effect

Active Publication Date: 2016-05-25
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few examples of direct preparation of nanomaterials with different shapes using carbon nanotubes as templates.

Method used

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  • Method for adjusting morphology and size of tungsten oxide by using carbon nanotube
  • Method for adjusting morphology and size of tungsten oxide by using carbon nanotube

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Soak 15 mg of carbon nanotubes with a diameter of 10nm and 3 layers in hydrochloric acid, reflux at 140°C under constant temperature stirring, filter, dry, and then disperse in 150mL ethylene glycol ultrasonically for 15 hours to obtain uniformly dispersed carbon nanotubes Ethylene glycol suspension; completely dissolve sodium tungstate in a mixture of deionized water and ethylene glycol to obtain a sodium tungstate solution with a concentration of 0.05 mol / L, wherein the molar ratio of sodium tungstate to carbon nanotubes is 2:1; add the carbon nanotube ethylene glycol suspension in step (1) to the sodium tungstate solution in step (2), stir it with a thermostatic magnetic stirrer under oil bath conditions, and mix it Mix well, use a micro-injector to add an appropriate amount of hydrochloric acid solution to the system when the oil bath temperature is 60°C. The hydrochloric acid concentration is 6mol / L, the dosage is 4mL, and the pH of the system is adjusted to 3; then ...

Embodiment 2

[0025] Soak 15mg of carbon nanotubes with a diameter of 20nm and 3 layers in nitric acid, reflux at 100°C under constant temperature stirring, filter, dry, and then place in 100mL ethylene glycol, and ultrasonically disperse for 8h to obtain uniformly dispersed carbon nanotubes Tube ethylene glycol suspension; completely dissolve sodium tungstate in deionized water to obtain a sodium tungstate solution with a concentration of 0.05 mol / L; the molar ratio of sodium tungstate to carbon nanotubes is 6:1. Add the carbon nanotube ethylene glycol suspension in step (1) to the sodium tungstate solution in step (2), stir it with a constant temperature magnetic stirrer under oil bath conditions, and mix them evenly. When the oil bath temperature is 60℃, use a micro-injector to add a proper amount of hydrochloric acid solution to the system. The concentration of hydrochloric acid is 8mol / L, the dosage is 4mL, and the pH of the system is adjusted to 1-5; then the reaction temperature is inc...

Embodiment 3

[0027] Soak 15 mg of carbon nanotubes with a diameter of 20 nm and 3 layers in a mixture of hydrochloric acid and nitric acid. In the medium, reflux under constant temperature stirring at 120°C, filter and dry, and then place it in 100 mL of ethylene glycol for ultrasonic dispersion for 12 hours to obtain a uniformly dispersed carbon nanotube ethylene glycol suspension; completely dissolve the sodium tungstate in deionized water and In the mixture of ethylene glycol, a sodium tungstate solution with a concentration of 0.05 mol / L is obtained; the molar ratio of sodium tungstate to carbon nanotubes is 8:1. Add the carbon nanotube ethylene glycol suspension in step (1) to the sodium tungstate solution in step (2), stir it with a constant temperature magnetic stirrer under oil bath conditions, and mix them evenly. When the oil bath temperature is 70℃, use the micro-injector to add an appropriate amount of hydrochloric acid solution to the system. The concentration of hydrochloric a...

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Abstract

The invention discloses a method for adjusting the morphology and the size of a tungsten oxide by using carbon nanotubes, and belongs to the technical field of tungsten-based nano materials. The method comprises the following steps: by taking the carbon nanotubes as a template and a morphology adjusting agent, ethylene glycol as a dispersing agent and a tungsten metal salt as a tungsten source, adding an acid solution into a reaction system, enabling a tungstic acid to nucleate and grow up on the surface of a carbon nanotube bundle, so as to form a carbon nanotube / tungstic acid compound; putting the compound into a high-temperature reaction area, and performing thermal treatment in the presence of an inert atmosphere. The method is simple in preparation process, concise in process control and wide in application prospect, the raw materials are easy to obtain, and the morphology and the size of the prepared tungsten oxide can be regulated and controlled.

Description

Technical field [0001] The invention relates to a preparation method in the technical field of tungsten-based nanomaterials, in particular to a method for adjusting the shape and size of tungsten oxide by carbon nanotubes. Background technique [0002] The structure of materials, namely dimensions, morphology, size, specific surface area and other factors have a direct impact on its performance. How to effectively control these influencing factors has always been a frontier subject and research hotspot in the fields of materials, condensed matter physics and materials chemistry. [0003] my country is a big country with tungsten resources. If the strategic goal of tungsten products is placed on high-value-added deep-processed products and technology-intensive products, the application fields of tungsten resources will be further expanded. Among them, the preparation of nano-tungsten oxide with unique morphology is of great significance for expanding its applications. [0004] Nanoma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G41/02C01P2004/04C01P2004/16C01P2004/20C01P2004/62C01P2004/64
Inventor 尹艳红吴子平赵曼吴高胡英燕
Owner JIANGXI UNIV OF SCI & TECH
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