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Method for preparing silica/carbon nanometer material with micropores and ordered mesopores

A carbon nanomaterial and silicon oxide technology, which is applied in the field of preparation of silicon oxide/carbon nanomaterials, can solve the problems of carbon residue, complex synthesis process, difficult functionalization of carbon nanomaterials, etc., and achieves easy operation, simplified preparation process, Effects with low equipment requirements

Inactive Publication Date: 2017-09-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a method for preparing silicon oxide / carbon nanomaterials with micropores and ordered mesoporous pores, which solves the problems of difficult functionalization of carbon nanomaterials, complex synthesis process and carbon deposition residues.

Method used

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  • Method for preparing silica/carbon nanometer material with micropores and ordered mesopores
  • Method for preparing silica/carbon nanometer material with micropores and ordered mesopores
  • Method for preparing silica/carbon nanometer material with micropores and ordered mesopores

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preparation example Construction

[0031] The invention provides a method for preparing a silicon oxide / carbon nanomaterial with micropores and ordered mesopores, comprising the following steps:

[0032] Step 1. Add 2-3g template agent (such as alkyltrimethylammonium bromide) (analytical pure) into the flask, then add 54-104mL water and 0-50mL absolute ethanol (analytical pure liquid ethanol, mass fraction 99.7% or more), magnetically stirred until hexadecyltrimethylammonium bromide is completely dissolved to clarification (dissolution is enough, it can be dissolved by heating in a water bath at 40-60°C, and the stirring speed is not limited), and moved to Stir magnetically at room temperature (25°C) (stirring speed is slow, generally 100-300r / min), then add 0.984-3.28g resorcinol (analytical pure), 372-1240μL formaldehyde (mass fraction 37-40 %), then add 4-10mL silane coupling agent dropwise (the stirring speed is accelerated when the silane coupling agent is added dropwise, generally 800r / min), the concentra...

Embodiment 1

[0043] This embodiment provides a method for preparing a silicon oxide / carbon nanomaterial with micropores and ordered mesopores, comprising the following steps:

[0044] Step 1. Add 2.6120g of cetyltrimethylammonium bromide to the flask, then add 96mL of water and 8mL of absolute ethanol, stir magnetically in a water bath until the cetyltrimethylammonium bromide is dissolved until it becomes clear, and then move to Magnetic stirring at room temperature (stirring speed is slower), then add 2.296g resorcinol (analytical pure), 868 μ L formaldehyde (mass fraction is 37%), then add 6mL orthosilicate ethyl ester dropwise (stirring speed is faster ), SiO in tetraethyl orthosilicate 2 The mass fraction of the mixture satisfies 28%, and the stirring is continued for 5 minutes, 1200 μL of ammonia water (25% mass fraction) is added dropwise, and stirred at room temperature for 24 hours to obtain a gel;

[0045] Step 2. Put the gel obtained in step 1 into a reaction kettle, react in an...

Embodiment 2

[0050] Adopting the experimental process of Example 1, the difference is that the addition of absolute ethanol is 30mL, and the addition of water is 74mL; the mesopore diameter of the obtained silicon oxide / carbon nanomaterial is 2.8nm, and the specific surface area is 884m 2 / g, the micropore diameter is 0.91nm.

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Abstract

The invention discloses a method for preparing a silica / carbon nanometer material with micropores and ordered mesopores. The method mainly comprises the following steps: dissolving a template agent, sequentially adding resorcinol and formaldehyde, then adding a silane coupling agent, and finally adding ammonium hydroxide so as to obtain gel; crystallizing the obtained gel in a reaction kettle, performing suction filtration, washing to obtain neutral gel, and drying; refluxing the obtained sample, and removing the template agent; adding the sample obtained in the previous step into a tubular furnace, and roasting in an inert gas atmosphere, thereby finally obtaining the silica / carbon nanometer material with micropores and ordered mesopores. According to the method for preparing the silica / carbon nanometer material with micropores and ordered mesopores synthesized and provided in the invention, the prepared material has micro-mesopore dual-model holes. The preparation method has the advantages of simple process, low cost, mesopore orderliness, controllable size, wide distribution range and the like.

Description

technical field [0001] The invention belongs to the field of inorganic synthetic micro-mesoporous materials, in particular to a method for preparing silicon oxide / carbon nanometer materials with micropores and ordered mesopores. Background technique [0002] Porous materials have been widely studied in the current scientific and technological fields, including water and air purification, separation, catalysis, sensors, semiconductor materials and energy storage and conversion, etc. Due to its high specific surface area, large pore volume, good chemical and thermodynamic stability, etc., especially ordered mesoporous materials have narrow pore size distribution and can be adjusted in a wide range of pore size and spatial structure. adjust. [0003] Silicon oxide / carbon nanomaterials have unique chemical, thermodynamic and mechanical stability characteristics, and have attracted more and more attention from scholars. There are many synthesis methods. The mesoporous silicon S...

Claims

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Application Information

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IPC IPC(8): C01B33/12C01B32/05
CPCC01B33/12C01P2002/72C01P2004/03C01P2004/80C01P2006/12C01P2006/17
Inventor 朱正健白诗扬孙继红武霞尚慧
Owner BEIJING UNIV OF TECH
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