Heterostructure material of hydrotalcite and carbon nanotube and its prepn process

A carbon nanotube and heterostructure technology is applied in the field of hydrotalcite/carbon nanotube heterostructure materials and their preparation to achieve the effect of uniform composite system

Inactive Publication Date: 2007-11-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the method of assembling hydrotalcite on carbon nanotubes to obtain composite heterostructures by using bridging molecules with functional groups

Method used

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  • Heterostructure material of hydrotalcite and carbon nanotube and its prepn process
  • Heterostructure material of hydrotalcite and carbon nanotube and its prepn process
  • Heterostructure material of hydrotalcite and carbon nanotube and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 3 g of carbon nanotubes with a length of 5-15 μm and a diameter of 40-60 nm and put them into a three-necked flask, add 100 ml of nitric acid with a concentration of 65%, heat and reflux for 6 hours, after the reflux is completed, cool to room temperature for suction filtration, and use deionized water Wash until neutral, then dry in an oven at 60° C. for 12 hours, and collect the modified carbon nanotubes.

[0026] 4.3655g Co(NO 3 ) 3 ·6H 2 O and 1.8756g Al(NO 3 ) 3 9H 2 O was added to 100ml degassed deionized water to prepare a mixed salt solution, wherein Co(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar concentrations of O are 0.15M and 0.05M respectively, and additionally 1.600g NaOH and 1.0599g NaOH 2 CO 3 Add to 100ml degassed deionized water to prepare a mixed alkaline solution, in which NaOH and Na 2 CO 3 The molar concentrations are 0.4M and 0.1M respectively. Pour the mixed alkaline solution into a four-necked flask, then add 0.5g of carbo...

Embodiment 2

[0029] Put 3 g of carbon nanotubes with a length of 5-15 μm and a diameter of 20-40 nm into a three-necked flask, add 100 ml of nitric acid with a concentration of 65%, heat and reflux for 8 hours, after the reflux is completed, cool to room temperature for suction filtration, and use deionized Wash with water until neutral, and then dry in an oven at 60° C. for 12 hours to collect the modified carbon nanotubes.

[0030] 9.3056g Ni(NO 3 ) 2 ·6H 2 O and 6.0021g Al(NO 3 ) 3 9H 2 O was added to 80ml degassed deionized water to prepare a mixed salt solution, wherein Ni(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 The molar concentrations of O are 0.4M and 0.2M respectively, and 3.840g NaOH and 2.7197g NaNO 3 Add to 80ml degassed deionized water to prepare a mixed alkaline solution, in which NaOH and NaNO 3 The molar concentrations are 1.2M and 0.4M respectively. Pour the mixed alkaline solution into a four-neck flask, add 1g of carbon nanotubes and 0.03mol of L-cysteine, stir at...

Embodiment 3

[0033] Put 2 g of carbon nanotubes with a length of 5-15 μm and a diameter of 20-40 nm into a three-neck flask, add 80 ml of nitric acid with a concentration of 65%, heat and reflux for 5 hours, after the reflux is completed, cool to room temperature for suction filtration, and use deionized Wash with water until neutral, and then dry in an oven at 60° C. for 12 hours to collect the modified carbon nanotubes.

[0034] 14.2620g NiCl 2 ·6H 2 O and 5.4060 g FeCl 3 9H 2 O was added to 100ml degassed deionized water to prepare a mixed salt solution, in which NiCl 2 ·6H 2 O, FeCl 3 9H 2 The molar concentrations of O are 0.6M and 0.2M respectively. In addition, 6.4000g NaOH and 2.3376g NaCl are added to 100ml degassed deionized water to prepare a mixed alkaline solution, wherein the molar concentrations of NaOH and NaCl are 1.6M and 0.4M respectively, Pour the mixed alkaline solution into a four-necked flask, add 0.8g of carbon nanotubes and 0.06mol of L-cysteine, stir at room...

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Abstract

The present invention provides one kind of heterostructure material of hydrotalcite and carbon nanotube and its preparation process. Carbon nanotube and bridging molecule L-cysteine are first added into alkali solution and the mixture solution of soluble bivalent metal salt and trivalent metal salt is then added to produce co-precipitation reaction to prepare hydrotalcite. During the reaction, the -NH2 end of L-cysteine existing in positively charged -NH3+ combines stably with the negatively charged -COO- and -O- radicals in the surface of carbon nanotube while the -SH end of L-cysteine and the metal ion in the hydrotalcite layer form coordinate bond, so that hydrotalcite is assembled onto carbon nanotube by means of the bridging effect. The present invention can raise the dispersivity of hydrotalcite particle and the active center, and the obtained heterostructure material is homogeneous, stable, strong in binding force and adjustable in assembled amount.

Description

technical field [0001] The invention belongs to the technical field of material structure preparation and assembly methods. It specifically relates to a hydrotalcite / carbon nanotube heterostructure material and a preparation method thereof. The system obtained by the method has the characteristics of stable structure, good dispersion and adjustable composition. Background technique [0002] Carbon nanotubes are a kind of carbon-based materials with a hollow tubular structure and a large specific surface area. Due to their unique structural characteristics and physical and chemical properties, they have broad application prospects in many fields such as adsorption, photoelectricity, hydrogen storage, energy, and catalysis. , one of the important applications is as a catalyst carrier for specific catalytic reactions to improve catalytic performance. After simple treatment and surface modification of carbon nanotubes, many functional groups such as hydroxyl groups and carboxyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J21/16
Inventor 项顼王辉李峰
Owner BEIJING UNIV OF CHEM TECH
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