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Method for simultaneously preparing multilevel-structure mesoporous silicon dioxide and carbon nano material

A technology of mesoporous silica and carbon nanomaterials, applied in the direction of silica, silicon oxide, nanotechnology for materials and surface science, etc., can solve the problems of tedious and time-consuming methods and many steps, and achieve low cost, Simple operation effect

Inactive Publication Date: 2012-08-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that there are many steps in the existing multi-level structure mesoporous material preparation technology, which is cumbersome and time-consuming, and can only prepare one material at a time, and provides a method for simultaneously preparing multi-level structure mesoporous dioxide Methods for silicon and carbon nanomaterials

Method used

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  • Method for simultaneously preparing multilevel-structure mesoporous silicon dioxide and carbon nano material
  • Method for simultaneously preparing multilevel-structure mesoporous silicon dioxide and carbon nano material
  • Method for simultaneously preparing multilevel-structure mesoporous silicon dioxide and carbon nano material

Examples

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Effect test

Embodiment 1

[0040] Preparation of tubular hollow mesoporous silica and carbon nanomaterials using the preparation system of the present invention

[0041] 1. Preparation of reaction solution

[0042] 1. In a reaction vessel, mix 4 mL of ethanol and 24 mL of water to prepare a reaction solvent; add 0.2 mL of ammonia solution with a mass concentration of 25% to 30%, 0.2 g of resorcinol and 0.2 g of CTAB into the reaction solvent.

[0043] 2. Stir the above mixture at room temperature for 30 min, add 0.28 mL formaldehyde solution and 1 mL TEOS.

[0044] 2. Preparation of composites of polymer phenolic resin, silicon dioxide and surfactant

[0045] Continue stirring the mixed solution prepared in step 1 at room temperature for 24 hours, then transfer the mixed solution to a sealed reaction vessel and perform hydrothermal treatment at a temperature of 100°C for 24 hours, then remove the supernatant to obtain a precipitate, and dry to obtain a solid powder; The obtained solid powder is a comp...

Embodiment 2

[0052] Preparation of hollow mesoporous silica microspheres and eggshell-yolk structure (Rattle-type) mesoporous carbon nanospheres using the preparation system of the present invention

[0053] 1. Preparation of reaction solution

[0054] 1. Same as Step 1 of Example 1, except that 8 mL of ethanol and 20 mL of water are mixed to prepare the reaction solvent.

[0055] 2. Same as step 1 of embodiment 1.

[0056] 2. Preparation of composites of polymer phenolic resin, silicon dioxide and surfactant

[0057] Same as Step 2 of Example 1.

[0058] 3. High-temperature carbonization to obtain a composite of carbon material and silicon dioxide

[0059] Same as Step 3 of Example 1.

[0060] 4. Preparation of hierarchical mesoporous silica or carbon nanomaterials

[0061] 1. Same as Step 4 of Example 1, except that the obtained hollow mesoporous silica microspheres. attached image 3 Among them, (a) is its SEM image, (b, c) is its TEM image.

[0062] 2. Same as Step 4 of Example...

Embodiment 3

[0064] The preparation system of the present invention is used to prepare irradiated mesoporous silica microspheres and hollow mesoporous carbon nanospheres.

[0065] 1. Preparation of reaction solution

[0066] 1. Same as Step 1 of Example 1, except that 12 mL of ethanol and 16 mL of water are mixed to prepare the reaction solvent.

[0067] 2. Same as step 1 of embodiment 1.

[0068] 2. Preparation of composites of polymer phenolic resin, silicon dioxide and surfactant

[0069] Same as Step 2 of Example 1.

[0070] 3. High-temperature carbonization to obtain a composite of carbon material and silicon dioxide

[0071] Same as Step 3 of Example 1.

[0072] 4. Preparation of hierarchical mesoporous silica or carbon nanomaterials

[0073] 1. Same as Step 4 of Example 1, the difference is that what is obtained is irradiated mesoporous silica microspheres. attached Figure 4 Among them, (a) is its SEM image, (b, c) is its TEM image.

[0074] 2. Same as Step 4 of Example 1, ...

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Abstract

The invention relates to a method for simultaneously preparing multilevel-structure mesoporous silicon dioxide and a carbon nano material, belonging to the field of mesoporous nano material preparation. The method comprises the following steps: mixing water and alcohols to prepare a reaction solvent; adding a catalyst alkali, a reaction reagent resorcin and a surfactant CTAB (cetyltrimethylammonium bromide) into the reaction solvent; after stirring, adding a reaction reagent formaldehyde solution and TEOS (tetraethyl orthosilicate) to obtain a mixed solution; continuing stirring the mixed solution at room temperature, removing the supernatant to obtain a precipitate, and drying to obtain solid powder; calcining the solid powder at high temperature under inert gas shielding to carbonize the solid powder, thereby obtaining black solid powder; soaking the black solid powder in a hydrogen fluoride water solution or strongly alkaline solution to remove silicon dioxide, thereby obtaining a multilevel-structure mesoporous carbon material; and calcining the solid powder or black solid powder at high temperature in the air to obtain the multilevel-structure mesoporous silicon dioxide material. The method provided by the invention is simple to operate, has the advantage of low cost, and can implement large-scale production.

Description

technical field [0001] The invention relates to a method for simultaneously preparing multilevel structure mesoporous silicon dioxide and carbon nanomaterials. It belongs to the field of preparation of mesoporous nanomaterials. Background technique [0002] Since the discovery of the superiority of natural porous materials in the 1940s, people have begun to artificially synthesize porous materials. According to the definition of the International Union of Pure and Applied Chemistry (IUPAC), porous materials can be divided into microporous materials, mesoporous materials and macroporous materials, and pores with a diameter between 2 and 50 nm are mesopores. . In 1992, MOBIL successfully synthesized M41S mesoporous materials (MCM-41, MCM-48, MCM-50) using alkyl quaternary ammonium cationic surfactants as templates for the first time, thus expanding porous materials from micropores to mesopores. Pores, and build a bridge between microporous materials (such as zeolite) and ma...

Claims

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Application Information

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IPC IPC(8): C01B33/18C01B31/02B82Y30/00B82Y40/00C01B32/15
Inventor 曹传宝张兴华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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