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Synthesis of zinc-benzoic-acid-modified single-wall carbon nano tube porous material and use thereof in gas storage

A technology of single-walled carbon nanotubes and porous materials, applied in the direction of adsorption, other chemical processes, and separation of dispersed particles, can solve the problems of influence, small effective specific surface area of ​​CNT, etc., and achieve the effect of high specific surface area

Inactive Publication Date: 2011-08-17
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a large intermolecular attraction between CNTs, which often exist in bundles, making the effective specific surface area of ​​CNTs relatively small, which has greatly affected the large-scale application of CNTs as gas storage materials in industry.

Method used

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  • Synthesis of zinc-benzoic-acid-modified single-wall carbon nano tube porous material and use thereof in gas storage
  • Synthesis of zinc-benzoic-acid-modified single-wall carbon nano tube porous material and use thereof in gas storage
  • Synthesis of zinc-benzoic-acid-modified single-wall carbon nano tube porous material and use thereof in gas storage

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of Porous Materials. Mix 48mg (4mmol) SWNT with 1.1g (8mmol) p-aminobenzoic acid and add 20mL CH 2 Cl 2 , stir evenly to completely dissolve p-aminobenzoic acid, and then concentrate to dryness under reduced pressure; inject 4.2mL isoamyl nitrite in an Ar atmosphere, react at 60°C for 6h, add 30mL DMF after cooling, continue stirring for 30min, and centrifugally pump Filtered, respectively with DMF, CH 2 Cl 2 , washed with acetone until the filtrate was colorless; the product was dried in a vacuum oven at 50°C overnight to obtain 60 mg of black powder SWNT-PhCOOH. Take 50mg SWNT-PhCOOH sample into the reactor, add 30mL DMF, ultrasonicate at room temperature for 3h, add Zn(NO 3 ) 2 ·6H 2 O 59mg, then stirred at room temperature for 12h, transferred to a sealed glass bottle, reacted at 105°C for 72h, slowly lowered to room temperature, filtered with suction, washed with a small amount of anhydrous (dehydrated) ether, and dried the solid in a vacuum oven ...

Embodiment 2

[0033] The preparation of the porous material is the same as in Example 1, except that SWNT-PhCOOH and Zn(NO 3 ) 2 ·6H 2 The molar ratio of O species was 1:1, reacted at 105°C for 36h, and labeled as SWNT-Zn-1. The activation and test conditions of the porous material were the same.

[0034] Determination of specific surface area of ​​porous materials. The hybrid material exhibits I-line characteristics in the low-pressure region, reflecting micropore adsorption, and IV-type line characteristics in the high-pressure region, reflecting the split-hole adsorption of carbon nanotubes. SWNT-Zn-1 reacts to N at 77K and 1atm 2 The highest adsorption capacity is 1085cm 3 g -1 , the adsorption capacity of the raw material SWNT under the same conditions is 700 cm 3 g -1 . Obviously, the gas adsorption capacity of SWNT-Zn-1 was significantly improved ( Figure 8 ).

[0035] Table 1. Specific surface area and pore volume of SWNT, SWNT-PhCOOH and SWNT-Zn

[0036]

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Abstract

The invention discloses the synthesis of a zinc-benzoic acid-modified single-wall carbon nano tube porous material and the use of the material in gas storage. In the invention, quasi one-dimensional single-wall carbon nano tubes (SWNT) covalently modified by benzoic acid are used as organic connectors, zinc ions are used as nodes, the quasi one-dimensional SWNTs are expanded into a multi-dimensional hybrid porous material based on zinc-ion-benzoic-acid-modified single-wall carbon nano tubes through the coordination of the carboxyl groups on the benzoic acid-modified single-wall carbon nano tubes and zinc ions, and thus, the interaction of the Van der Waals forces between the single-wall carbon nano tubes is overcome and the bunched SWNTs are separated. Compared with pure SWNTs, the specific area or gas adsorption capacity of the hybrid porous material is improved obviously, and the hybrid porous material can be used for collecting carbon dioxide which is a greenhouse gas and storing hydrogen at the same time. Furthermore, the material can be developed into a novel gas storage material.

Description

technical field [0001] The invention relates to the synthesis and gas storage application of zinc-benzoic acid modified single-wall carbon nanotube hybrid porous material. Using quasi-one-dimensional single-walled carbon nanotubes covalently modified with benzoic acid as organic linkers and zinc as nodes to construct larger specific surface area, more micropores and mesoporous channels and unsaturated metal coordination sites Zn-benzoic acid-modified single-walled carbon nanotube hybrid porous materials. This type of material can efficiently capture the greenhouse gas carbon dioxide and store hydrogen at the same time. Background technique [0002] Energy is one of the important material bases for social development and daily life. In recent years, on the one hand, the increasing depletion of fossil energy such as coal, oil, and natural gas has caused mankind to face an "energy crisis". Hydrogen energy has attracted people's attention due to its high combustion energy den...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01D53/02B01J20/20
CPCY02C10/08Y02C20/40
Inventor 温丽丽李东风王锋
Owner HUAZHONG NORMAL UNIV
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