Method for producing manganese dioxide coating carbon nano-tube core-shell type composite material

A technology of nanotube composite and manganese dioxide, which is applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve the problems of poor electrical conductivity, achieve the effects of reducing damage, increasing specific surface area, and broad application prospects

Inactive Publication Date: 2008-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the conductivity of manganese dioxide is poor, and materials such as carbon black and carbon nanotubes with better conductivity are often added in practical applications.

Method used

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  • Method for producing manganese dioxide coating carbon nano-tube core-shell type composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The carbon nanotubes with a tube diameter of 40nm are added to the mixed acid prepared by concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, the amount of the mixed acid is 10 times the mass of the carbon nanotubes, ultrasonically treated for 0.5 hours, filtered, and Repeated washing with distilled water until the pH value of the filtered lotion is 6-7;

[0020] Take 100 mg of carbon nanotubes and 150 mg of sodium dodecylbenzene sulfonate obtained above and add them to 50 ml of water, and after a little stirring, ultrasonic treatment for 0.5 hours, so that the carbon nanotubes are evenly dispersed in water to form a stable suspension;

[0021] Add 1.5g of potassium permanganate and 3ml of 98% concentrated sulfuric acid to the above suspension, stir for a while and then sonicate for 0.5 hours;

[0022] After filtering and dehydrating, wash repeatedly with distilled water until the pH value of the filtered lotion is about 6-7;

[0023] The ...

Embodiment 2

[0026] Carbon nanotubes with a tube diameter of 20nm are added to the mixed acid prepared by concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, the amount of mixed acid is 15 times the mass of the carbon nanotubes, ultrasonically treated for 1 hour, filtered, and Repeated washing with distilled water until the pH value of the filtered lotion is 6-7;

[0027] Take 100mg of carbon nanotubes and 200mg of sodium deoxycholate obtained above and add them to 50ml of water, stir them and then ultrasonicate for 1 hour, so that the carbon nanotubes are evenly dispersed in water to form a stable suspension;

[0028] Add 2.0g of potassium permanganate and 2ml of 98% concentrated sulfuric acid to the above suspension, stir for a while and then sonicate for 1 hour;

[0029] After filtering and dehydrating, wash repeatedly with distilled water until the pH value of the filtered lotion is about 6-7;

[0030] The resultant is air-dried to obtain the manganese di...

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Abstract

The invention discloses a preparation method of core-shell type composite materials of a manganese dioxide coated carbon nm tube. The method comprises the steps as follows: the carbon nanometer tube is put in mixed acid containing thick sulphuric acid and thick nitric acid for supersonic treatment, thereby enabling the surface of the carbon tube to contact with hydrophilic group; the carbon nanometer tube with surfactant is mixed to form suspending liquid; permanganate salts is added to react with the surfactant so as to produce the manganese dioxide which nucleates on the surface of the carbon tube; the manganese dioxide grows and forms even coating. The invention with simple technique and low production cost realizes the coating on the surface of the carbon nm tube and reduces the damages to the structure of the carbon tube. The nanometer crystals of the manganese dioxide array along the tube diameter of the carbon tube to enlarge the surface area of the coating. The composite powder has good dispersivity and high porosity. And the composite powder exhibits wide applicable prospect in the industrial fields of the chemical catalyst, the high performance battery and the super capacitor.

Description

technical field [0001] The invention relates to a preparation method of manganese dioxide-coated carbon nanotube core-shell composite material. Background technique [0002] Carbon nanotubes are a one-dimensional material with a unique structure. The graphite carbon atoms are curled into a seamless tubular structure. The diameter of the tube is generally several nanometers to tens of nanometers, and the length can reach several microns. According to the number of graphite surface layers, carbon nanotubes can be divided into single-walled tubes, double-walled tubes and multi-walled tubes. Due to the unique properties of carbon nanotubes, it has very broad application prospects. In recent years, countries such as the United States, Japan, Germany, and China have successively established nanomaterial research institutions, which has accelerated the research progress of carbon nanotubes and made some breakthroughs in preparation and application. [0003] Carbon nanotubes are m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09C1/44
Inventor 张孝彬周胜名糜裕宏万蔡华董西慧祝华云程继鹏
Owner ZHEJIANG UNIV
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