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Bowl-shaped mesoporous carbon microspheres as well as preparation method and application thereof

A carbon microsphere and mesoporous technology, which is applied in the field of bowl-shaped mesoporous carbon microspheres and its preparation, can solve problems such as unfavorable carbon microsphere surface and modification

Active Publication Date: 2021-05-18
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, carbon microspheres with high specific surface area are prepared by combining hydrothermal carbonization and calcination, but calcination (400-1200°C) will destroy the oxygen-containing functional groups contained on the surface of carbon microspheres, which is not conducive to the modification of the surface of carbon microspheres.

Method used

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  • Bowl-shaped mesoporous carbon microspheres as well as preparation method and application thereof
  • Bowl-shaped mesoporous carbon microspheres as well as preparation method and application thereof
  • Bowl-shaped mesoporous carbon microspheres as well as preparation method and application thereof

Examples

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preparation example Construction

[0067] The present invention also provides a preparation method for preparing the above-mentioned bowl-shaped mesoporous carbon microspheres, which includes:

[0068] The first step: using carbon source, surfactant, chloride and stabilizer as raw materials, the carbon / metal oxide composite microspheres are obtained through the first hydrothermal reaction.

[0069] Wherein, chlorides include metal chlorides or hydrous metal chlorides.

[0070] In some examples of the present application, the metal chlorides include MCl x , where X takes a value of 2-4, and M is a metal element; hydrous metal chlorides include MCl x ·nH 2 O, where X takes a value of 2-4, n takes a value of 1-3, and M is a metal element. During the preparation process, dissolve the carbon source, surfactant, chloride and stabilizer into deionized water, and add 0.4-1mol carbon source, 0.009-0.01mol surfactant, 0.1-0.5 The ratio of mol stabilizer and 0.1-0.5mol chloride is mixed. And react at a temperature of...

Embodiment 1

[0098] A preparation method of bowl-shaped mesoporous carbon microspheres, as follows:

[0099] Add 0.18g sodium lauryl sulfate, 3.4g SnCl to 70mL0.6mol / L glucose solution 2 2H 2 O, 2 g of 0.19 mol / L tartaric acid, magnetically stirred for 30 min, and reacted for 4 h while maintaining the temperature at 190°C. After the reaction, cool to room temperature, filter the obtained reaction solution, wash the filter cake alternately with deionized water and 95% ethanol several times until it becomes neutral, then dry the filter cake at 80°C for 5 hours, and obtain C / SnO 2 Microspheres.

[0100] will give C / SnO 2 The microspheres were mixed with hydrochloric acid solution and stirred magnetically for 30 minutes, in which C / SnO 2 Microspheres and hydrochloric acid solution with C / SnO 2 Mix microspheres: hydrochloric acid solution = 1g: 30mL, and the hydrochloric acid solution is prepared with a volume ratio of hydrochloric acid: deionized water = 1:5, and the concentration of hyd...

Embodiment 2

[0104] A preparation method of bowl-shaped mesoporous carbon microspheres, as follows:

[0105] The specific preparation method is the same as in Example 1, except that the reaction time of the first hydrothermal reaction is 3.5 hours.

[0106] A bowl-shaped mesoporous carbon microsphere prepared by the above-mentioned preparation method has a bowl-shaped appearance and mesoporous pores exist on the wall of the bowl. Among them, the specific surface area of ​​carbon microspheres is 38.5m 2 / g, the pore volume is 0.05cm 3 / g, the pore size is 5.5nm.

[0107] The specific measured carbon microspheres are bowl-shaped carbon microspheres, and the measurement method for characterizing its structural characteristics is the same as in Example 1, so the scanning electron microscope diagram, adsorption-desorption isotherm diagram, adsorption-desorption isotherm diagram, Pore ​​size distribution diagram, XPS spectrum and other diagrams. The specific measured values ​​can be found in...

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Abstract

The invention discloses bowl-shaped mesoporous carbon microspheres as well as a preparation method and application thereof, and belongs to the field of mesoporous carbon materials. The invention relates to a bowl-shaped mesoporous carbon microsphere, the carbon microsphere is bowl-shaped, mesopores exist on the bowl wall, the specific surface area of the carbon microsphere is 30-65m <2> / g, and the carbon microsphere has an oxygen-containing group. The material has a large specific surface area, and oxygen-containing groups on the surface are retained. A preparation method of bowl-shaped mesoporous carbon microspheres comprises the following steps: taking a carbon source, a surfactant, a metal chloride and a stabilizer as raw materials, and obtaining carbon / metal oxide composite microspheres through a first hydrothermal reaction; and carrying out a second hydrothermal reaction on the carbon / metal oxide composite microspheres and an acidic solution. The preparation method is short in period and simple in process, and the bowl-shaped mesoporous carbon microspheres with high specific surface area and oxygen-containing groups are prepared; the invention discloses application of bowl-shaped mesoporous carbon microspheres in preparation of catalytic materials, adsorbent materials, gas and energy storage materials and electrode materials.

Description

technical field [0001] The present application relates to the field of mesoporous carbon materials, in particular, to a bowl-shaped mesoporous carbon microsphere and its preparation method and application. Background technique [0002] Carbon microspheres prepared by conventional hydrothermal methods generally have a small specific surface area (3-10m 2 / g). At present, carbon microspheres with high specific surface area are prepared by combining hydrothermal carbonization and calcination, but calcination (400-1200°C) will destroy the oxygen-containing functional groups contained on the surface of carbon microspheres, which is not conducive to the modification of the surface of carbon microspheres. . Contents of the invention [0003] The invention provides a bowl-shaped mesoporous carbon microsphere, which has 30-65m 2 / g specific surface area, and the surface contains oxygen-containing groups. [0004] The invention also provides a method for preparing bowl-shaped me...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 袁红赵雪玲
Owner BEIFANG UNIV OF NATITIES
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