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Preparation method of nitrogen-doped hierarchical pore carbon materials

A technology of multi-level pores and carbon materials, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as poor thermal stability, underdeveloped pore structure, and low nitrogen content, and achieve The effect of stable quality, tunable specific surface area, and simple preparation method

Inactive Publication Date: 2014-01-29
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unexpectedly, the carbon materials obtained by these methods are always unsatisfactory, such as underdeveloped pore structure, poor thermal stability, and low nitrogen content.

Method used

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  • Preparation method of nitrogen-doped hierarchical pore carbon materials
  • Preparation method of nitrogen-doped hierarchical pore carbon materials
  • Preparation method of nitrogen-doped hierarchical pore carbon materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of aluminum-based metal-organic framework complexes

[0028] Soak 1.5kg of cleaned banana peel fragments in 2L of 1.0mol / L aluminum nitrate aqueous solution, and heat to dry at 70°C to obtain a yellow aluminum-based metal-organic framework complex material.

[0029] 2. Preparation of nitrogen-doped hierarchically porous carbon materials

[0030] Dissolve 1 g of Planck F127 with a relative molecular weight of 12600 in 50 mL of absolute ethanol, add 5 g of aluminum-based metal-organic framework complexes, stir at room temperature for 24 hours, then heat to 120 ° C, and thermally polymerize for 24 hours. The reaction product was calcined at 800°C for 3 hours under nitrogen protection, washed with 20% hydrofluoric acid aqueous solution and distilled water, and dried at 100°C to obtain a nitrogen-doped hierarchical porous carbon material.

[0031] Depend on figure 1 It can be seen that the prepared nitrogen-doped hierarchical porous carbon material obviously...

Embodiment 2

[0033] In the step 1 of preparing the aluminum-based metal-organic framework complex in this example, the concentration of the aluminum nitrate aqueous solution used is 0.6 mol / L. In the step 2 of preparing the nitrogen-doped hierarchical porous carbon material, the reaction product is under the protection of nitrogen, Calcined at 700° C. for 3 hours, and the other steps were the same as in Example 1 to prepare a nitrogen-doped hierarchically porous carbon material.

[0034] Depend on Figure 4 It can be seen that the prepared carbon material is a nano-hierarchical porous carbon material formed by different pore structures connected to each other. X-ray photoelectron spectroscopy analysis results show that the obtained carbon material is composed of carbon, oxygen and nitrogen species ( Figure 5 ), this result fully proves that the carbon material obtained under this condition is a nitrogen-doped hierarchical porous carbon material.

Embodiment 3

[0036] In step 2 of preparing nitrogen-doped hierarchically porous carbon materials in this example, 1 g of Planck F127 with a relative molecular mass of 12600 was completely dissolved in 50 mL of absolute ethanol, 20 g of aluminum-based metal-organic framework complexes were added, and the Stir for 24 hours, other steps are the same as in Example 1, and prepare nitrogen-doped hierarchical porous carbon material (see Figure 6 ).

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Abstract

The invention discloses a preparation method of nitrogen-doped hierarchical pore carbon materials. The method comprises the steps of soaking waste banana peel, which serves as a nitrogen source and a carbon source, into an aluminum nitrate aqueous solution with a certain concentration, thus forming a multi-pore-channel metalloid organic skeleton coordination complex material through coordination and modification of metal aluminum ions; constructing a large mesoporous mesostructure by using the multi-pore-channel metalloid organic skeleton coordination complex material as a template; carrying out microstructure regulation and guidance by using an amphiphilic triblock copolymer Planck F127 as a soft template to prepare a series of nitrogen-doped hierarchical pore carbon materials with high specific surface area, large pore volume and adjustable average mesoporous size. The raw materials are cheap, easily available and environment-friendly; the preparation method is simple and mild in condition; the obtained hierarchical pore carbon materials have stable quality, can be applied to CO2 gas adsorption with high selectivity, can also be applied to bilirubin adsorption with high selectivity, large adsorption capacity and excellent biocompatibility, and are expected to be a potential blood purification and separation medium material in the aspect of clinical medicine.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a method for preparing a nitrogen-doped hierarchical porous carbon material by combining a metal-organic framework complex with an amphiphilic triblock copolymer as a double template, and the material is selectively adsorbed in bile Application of red pigment. Background technique [0002] Hierarchical carbon material is a new type of carbon material with unique properties such as high specific surface area, large pore capacity, adjustable thermal conductivity and electrical conductivity, and corrosion resistance. It is used in adsorption, catalysis, separation, electrode materials, energy Storage and other fields have great application prospects. In order to obtain carbon materials with high surface area and large pore capacity, a large number of methods have been used to enhance these factors, such as catalytic activation method, sol-gel method, template c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
Inventor 张志琪刘瑞林刘喻尹福玉张继方管丽红
Owner SHAANXI NORMAL UNIV
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