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Carbon nano-tube composite material and uses for photocatalysis degradation

A technology of carbon nanotubes and composite materials, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost, unfavorable environmental friendliness, complicated preparation process, etc., and achieve low cost, Environmentally friendly, good catalytic performance

Inactive Publication Date: 2008-12-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people mainly rely on the modification of these materials or control their morphology to adjust their catalytic performance. The preparation process is relatively complicated and the cost is high.
Although the catalytic performance of titanium dioxide to degrade methyl orange is good, the raw materials used to synthesize titanium dioxide are more expensive, and the reaction requires strong acid treatment, which is not conducive to environmental friendliness

Method used

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  • Carbon nano-tube composite material and uses for photocatalysis degradation
  • Carbon nano-tube composite material and uses for photocatalysis degradation
  • Carbon nano-tube composite material and uses for photocatalysis degradation

Examples

Experimental program
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Effect test

Embodiment 1

[0030]A. Add 3 g of carbon nanotubes with a diameter of 60 to 100 nm and a length of 5 to 15 μm into a three-neck flask, then add 100 ml of concentrated nitric acid with a mass concentration of 65%, start stirring, condense and reflux for 6 hours, and cool to room temperature after the reaction is completed. Then wash with water and suction filter to pH = 7, and finally dry at 60°C for 6 hours, so as to obtain carbon nanotubes with carboxyl and hydroxyl groups on the surface without impurities.

[0031] B. Prepare two mixed solutions with de-oxygenated deionized water: 1.4874g Zn(NO 3 ) 2 ·6H 2 O and 0.9378gAl(NO 3 ) 3 9H 2 O add 50ml degassed deionized water to prepare mixed salt solution, wherein Zn(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar concentration of O is 0.10 mol L respectively -1 and 0.05mol L -1 , In addition, 1.200g NaOH and 1.0599g Na 2 CO 3 Add to 100ml degassed deionized water to prepare mixed alkali solution, in which NaOH and Na 2 CO 3 T...

Embodiment 2

[0036] A. Add 2 g of carbon nanotubes with a diameter of 60 to 100 nm and a length of 5 to 15 μm into a three-neck flask, then add 100 ml of concentrated nitric acid with a mass concentration of 65%, start stirring, reflux for 6 hours, and cool to room temperature after the reaction is completed. Then wash with water and suction filter to pH = 7, and finally dry at 60°C for 6 hours, so as to obtain carbon nanotubes with carboxyl and hydroxyl groups on the surface without impurities.

[0037] B. Prepare two mixed solutions with de-oxygenated deionized water: 13.3862g Zn(NO 3 ) 2 ·6H 2 O and 5.6270gAl(NO 3 ) 3 9H 2 O is added to 50ml degassed deionized water to prepare mixed salt solution, wherein Zn(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar concentration of O is 0.90mol L respectively -1 and 0.30mol L -1 , additionally 7.6800g NaOH and 6.3594g NaOH 2 CO 3 Add to 100ml degassed deionized water to prepare mixed alkali solution, in which NaOH and Na 2 CO 3 Th...

Embodiment 3

[0042] A. Add 3 g of carbon nanotubes with a diameter of 40 to 60 nm and a length of 5 to 15 μm into a three-neck flask, then add 100 ml of concentrated nitric acid with a mass concentration of 65%, start stirring, condense and reflux for 6 hours, and cool to room temperature after the reaction is completed. Then wash with water and suction filter to pH = 7, and finally dry at 60°C for 6 hours, so as to obtain carbon nanotubes with carboxyl and hydroxyl groups on the surface without impurities.

[0043] B. Prepare two mixed solutions with de-oxygenated deionized water: 2.2310g Zn(NO 3 ) 2 ·6H 2 O and 0.9378gAl(NO 3 ) 3 9H 2 O is added to 50ml degassed deionized water to prepare mixed salt solution, wherein Zn(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar concentration of O is 0.15mol L respectively -1 and 0.05mol L -1 , additionally 1.2800g NaOH and 1.0599g NaOH 2 CO 3 Add to 100ml degassed deionized water to prepare mixed alkali solution, in which NaOH and Na ...

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Abstract

The invention relates to a carbon nanotube composite material, in particular to a ZnAl, namely layered double hydroxides / carbon nanotube composite material ZnAl-LDHs / CNTs with [Zn<2+>1-xAl<3+>x(OH)2](CO3<2->)x / 2.nH2O / CNTs as a structural general formula. In the composite material, the layered double hydroxides are sheet shaped and evenly distributed on the surface of a carbon nanotube, and the grain size of the layered double hydroxides is between 10 and 40nm. The composite material is a good photocatalyst and can be used for photocatalytic degradation of dye molecules; and the catalytic efficiency for the photocatalytic degradation of methyl orange can reach between 60 and 90 percent.

Description

technical field [0001] The invention belongs to carbon nanotube composite material composite material and application thereof. It specifically relates to layered double hydroxide / carbon nanotube composites and their use in photocatalytic degradation of dye molecules. The composite material has the characteristics of stable structure and good photocatalytic performance. technical background [0002] Carbon nanotubes are widely used in catalysis, hydrogen storage, optics, electricity and other fields due to their unique structure and excellent performance. Carbon nanotubes are often used as catalyst supports due to their high specific surface area, good thermal stability, and chemical inertness. [0003] Layered double hydroxides (LDHs) are a class of layered inorganic functional materials, and their general structural formula is: [M II 1-x m III x (OH) 2 ]·[A n- x / n ]·nH 2 O, where M II , M III is the metal cation located on the laminate, A n- is an interlayer an...

Claims

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Application Information

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IPC IPC(8): B01J27/236B01J21/18C02F1/30C02F101/38C02F101/34
Inventor 项顼王辉李峰
Owner BEIJING UNIV OF CHEM TECH
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