Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of oxidized multi-walled carbon nanotube

A technology of multi-walled carbon nanotubes and hydrogen peroxide, which is applied in the direction of multi-walled carbon nanotubes, carbon nanotubes, chemical instruments and methods, etc., can solve the problems of large proportion of strong acid used and inability to maintain dispersibility for a long time, and overcome the insoluble water effect

Active Publication Date: 2017-11-24
深圳市金百纳纳米科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods add very few functional groups, and use a large proportion of strong acid, and the oxidized sample cannot maintain dispersion for a long time in aqueous solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of oxidized multi-walled carbon nanotube
  • A kind of preparation method of oxidized multi-walled carbon nanotube
  • A kind of preparation method of oxidized multi-walled carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Firstly add 30mL of concentrated nitric acid into the four-necked bottle, then add 60mL of concentrated sulfuric acid, and mechanically stir in an ice-water bath for 15 minutes to obtain a mixed acid at a temperature of 5-10°C. Take 1.0g of multi-walled carbon nanotubes and add them, stir for 10 minutes, the temperature is 5-10°C; gradually add 6g of potassium permanganate slowly, the interval between each addition is 15min, keep the temperature below 10°C in the ice-water bath for co-reaction The time is 3 hours; the water is drained and heated to 50° C. for a total of 15 hours; the reaction mixture is cooled to room temperature, and 100 mL of water is slowly added dropwise to dilute. Pour the sample solution into a beaker to dilute to 300mL, and the temperature of the solution is below 40°C; add 5mL of 30% hydrogen peroxide to the solution, and let it stand for 24 hours, then pour off the supernatant; use an appropriate amount of 5% HCl and pure water to Sample washin...

Embodiment 2

[0026] Firstly add 30mL of concentrated nitric acid into the four-necked bottle, then add 60mL of concentrated sulfuric acid, and mechanically stir in an ice-water bath for 15 minutes to obtain a mixed acid at a temperature of 5-10°C. Take 1.0g of multi-walled carbon nanotubes and add them, stir for 10 minutes, the temperature is 5-10°C; gradually add 6g of potassium permanganate slowly, the interval between each addition is 15min, keep the temperature below 10°C in the ice-water bath for co-reaction The time is 3 hours; the water is drained and heated to 50° C. for a total of 15 hours; the reaction mixture is cooled to room temperature, and 100 mL of water is slowly added dropwise to dilute. Pour the sample solution into a beaker to dilute to 300mL, and the temperature of the solution is below 40°C; add 5mL of 30% hydrogen peroxide to the solution, and let it stand for 24 hours, then pour off the supernatant; use an appropriate amount of 5% HCl and pure water to Sample washin...

Embodiment 3

[0031] Firstly add 30mL of concentrated nitric acid into the four-necked bottle, then add 60mL of concentrated sulfuric acid, and mechanically stir in an ice-water bath for 15 minutes to obtain a mixed acid at a temperature of 5-10°C. Take 1.0g of multi-walled carbon nanotubes and add them, stir for 10 minutes, the temperature is 5-10°C; gradually add 6g of potassium permanganate slowly, the interval between each addition is 15min, keep the temperature below 10°C in the ice-water bath for co-reaction The time is 3 hours; the water is drained and heated to 50° C. for a total of 15 hours; the reaction mixture is cooled to room temperature, and 100 mL of water is slowly added dropwise to dilute. Pour the sample solution into a beaker to dilute to 300mL, and the temperature of the solution is below 40°C; add 5mL of 30% hydrogen peroxide to the solution, and let it stand for 24 hours, then pour off the supernatant; use an appropriate amount of 5% HCl and pure water to Sample washin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an oxidized multi-walled carbon nanotube preparation method.The method includes: (1) stirring concentrated nitric acid and concentrated sulfuric acid in ice-water bath to obtain mixed acid, wherein the temperature is controlled at 5-10 DEG C; (2) adding multi-walled carbon nanotubes, and stirring, wherein the temperature is controlled at 5-10 DEG C; (3) gradually and slowly adding potassium permanganate in batches, wherein each-time adding time interval is 15min, the temperature of the ice-water bath is kept at about 10 DEG C, and reaction time is 3-4 hours; (4) discharging ice water and heating to 50 DEG C, wherein the total reaction time is 10-20 hours; (5) cooling reaction mixture to the room temperature, and slowly dropwise adding water for dilution, wherein a solution temperature is below 40 DEG C; (6) adding hydrogen peroxide to the solution, standing, and pouring supernatant away; (7) using 5% HCl and pure water for washing a sample to remove metal ions, and drying prepared multi-walled carbon nanotube oxide at the temperature of 100 DEG C prior to storage.By adoption of the mixed acid and the potassium permanganate for oxidization of the multi-walled carbon nanotubes, the oxidized multi-walled carbon nanotubes contain a great quantity of oxygen-containing functional groups such as carboxyl groups and hydroxyl groups.

Description

technical field [0001] The invention belongs to the technical field of oxidation of carbon-based materials, and in particular relates to a preparation method of oxidized multi-walled carbon nanotubes. Background technique [0002] Since Iijima et al. discovered nanometer-sized multi-walled carbon nanotubes (MWNTs) in the early 1990s, multi-walled carbon nanotubes have attracted extensive attention from many domestic and foreign scholars. Multi-walled carbon nanotubes have a unique hollow tubular structure, large specific surface area and high chemical stability, which make them have broad application prospects in many fields, such as field emitters, hydrogen storage materials, electronic components, catalyst carrier, etc. [0003] Multi-walled carbon nanotubes in the original state are macromolecules composed of carbon atoms, generally insoluble in any solvent, and easily agglomerated into groups in the solution, which hinders their molecular level research and operation, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/168B82Y40/00
CPCC01B2202/06C01B2202/20C01P2002/82C01P2006/22
Inventor 张超智李婷顾承越牛孟霄苏艳晓
Owner 深圳市金百纳纳米科技有限公司