Ferroferric oxide nano crystal loaded on acid-modified carbon nano tube and preparation method thereof

A technology of ferric tetroxide and carbon nanotubes, applied in chemical instruments and methods, alkali metal oxide/hydroxide, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reduced use effect and falling off , energy consumption and other issues, to achieve the effect of simple load method, tight integration and stable structure

Inactive Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxides supported by the liquid phase chemical deposition method and the impregnation roasting method are not very tightly combined with the carbon nanotubes, and are easy to fall off during use.
This makes the use of the product less effective or even unable to exert its due effect
In addition, the loading methods of the above methods essentially go through a deposition-roasting process. In addition to the poor combination of the load and the carrier, it also consumes more energy.

Method used

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  • Ferroferric oxide nano crystal loaded on acid-modified carbon nano tube and preparation method thereof
  • Ferroferric oxide nano crystal loaded on acid-modified carbon nano tube and preparation method thereof
  • Ferroferric oxide nano crystal loaded on acid-modified carbon nano tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 5 mg of multi-walled carbon nanotubes, add 3 ml of concentrated nitric acid and 9 ml of concentrated sulfuric acid, ultrasonicate at 50°C for 2 hours, cool, dilute with deionized water, filter, and wash. The modified carbon nanotubes were dispersed in 80 ml of water, 4 g of ferrous sulfate heptahydrate was added, placed in a water bath at 90° C., and nitrogen was blown to drive away oxygen. Preparation contains 40 milliliters of the mixed solution of 0.093 gram per milliliter of sodium hydroxide and 0.045 gram of per milliliter of sodium nitrate, and under keeping nitrogen flowing and stirring, this mixed solution is added dropwise in the above-mentioned mixed solution containing ferrous sulfate and carbon nanotubes, After the dropwise addition was completed, the temperature was continued for 2 hours. The generated black magnetic solid is separated from the liquid, and then ultrasonically washed 8 times and dried to obtain the carbon nanotube-supported ferric oxid...

Embodiment 2

[0035] Weigh 5 mg of multi-walled carbon nanotubes, add 3 ml of concentrated nitric acid, 9 ml of concentrated sulfuric acid, ultrasonicate at 60°C for 1 hour, cool, dilute with deionized water, filter, and wash. The modified carbon nanotubes were dispersed in 50 ml of water, 2 g of ferrous sulfate heptahydrate was added, placed in a water bath at 90° C., and nitrogen was blown to drive away oxygen. Preparation contains 40 milliliters of the mixed solution of 0.047 gram per milliliter of sodium hydroxide and 0.023 gram of per milliliter of sodium nitrate, and under keeping stirring with nitrogen, this mixed solution is added dropwise in the above-mentioned mixed solution containing ferrous sulfate and carbon nanotubes, After the dropwise addition was completed, the insulation was continued for 3 hours. The generated black magnetic solid is separated from the liquid, and then ultrasonically washed 8 times and dried to obtain the carbon nanotube-supported ferric oxide nanocrysta...

Embodiment 3

[0037] Weigh 10 mg of multi-walled carbon nanotubes, add 10 ml of concentrated nitric acid, 20 ml of concentrated sulfuric acid, ultrasonicate at 70°C for 1 hour, cool, dilute with deionized water, filter, and wash. The modified carbon nanotubes were dispersed in 100 ml of water, 4 g of ferrous sulfate heptahydrate was added, placed in a water bath at 90° C., and nitrogen was blown to drive away oxygen. Preparation contains 20 milliliters of the mixed solution of 0.20 gram per milliliter of potassium hydroxide and 0.045 gram of per milliliter of sodium nitrate, and under keeping nitrogen flowing and stirring, this mixed solution is added dropwise in the above-mentioned mixed solution containing ferrous sulfate and carbon nanotubes, After the dropwise addition was completed, the insulation was continued for 3 hours. The generated black magnetic solid is separated from the liquid, and then ultrasonically washed 8 times and dried to obtain the carbon nanotube-supported ferric oxi...

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Abstract

The invention discloses a magnetic ferroferric oxide nano crystal loaded on an acid-modified carbon nano tube and a preparation method thereof and belongs to the field of nano crystals. The preparation method comprises the following steps of: carrying out ultrasonic modification treatment on the carbon nano tube in mixed acid composed of nitric acid and sulfuric acid; then dispersing the modified carbon nano tube in aqueous solution; under the condition of introducing inert gas and stirring, adding ferrous ions; and under the condition of hot-water bathing, adding a strongly-alkaline solution of nitrate, and growing the magnetic ferroferric oxide nano crystal with a regular structure directly on the carbon nano tube. The preparation method is simple and practicable, the conditions are easily controlled, roasting is not needed, the energy consumption is lower and industrial production can be achieved. The combination of the loaded ferroferric oxide crystal and the carrier carbon nano tube is compact, and the structure is stable. The prepared magnetic nano composite material is an excellent out-phase Fenton catalyst which has a function of absorbing organic pollutants and is convenient in separation, and simultaneously can be used for manufacturing chemical sensors and electromagnetic material devices.

Description

technical field [0001] The invention relates to the field of modification and modification of carbon nanomaterials, in particular to acid-modified carbon nanotube-loaded magnetic iron tetraoxide nanocrystals and a preparation method thereof. Background technique [0002] The special structure of carbon nanotubes (CNTs) determines that it has special electrical and mechanical properties and excellent adsorption properties. The conductivity of carbon nanotubes can be metallic, semi-metallic and semiconducting. The special structure and mechanical, thermal and electrical properties of carbon nanotubes have aroused widespread interest of scientists, and have been applied in many fields such as field emission, molecular electronic devices, composite reinforcement materials, hydrogen storage materials, and catalysts. Compared with traditional carrier materials, carbon nanotubes have a unique nano-hollow structure, high thermal stability, extremely high strength and hardness, corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/28B01J23/745
Inventor 孙成胡晓斌刘本志邓月华喻恺杨泼杨绍贵
Owner NANJING UNIV
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