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Method for preparing porous carbon materials with different morphologies through ultrasonic spray pyrolysis regulation and control

A porous carbon material and ultrasonic spray technology, applied in the field of porous carbon materials, can solve the problems of inability to prepare porous carbon, single and uncontrollable morphology, etc., and achieve the effects of easy control of reaction, beautiful appearance and uniform size distribution.

Inactive Publication Date: 2020-02-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above preparation methods can effectively prepare porous carbon, but its morphology is usually single and uncontrollable, and it is impossible to prepare porous carbon with different specific surface areas and pore diameters according to different needs.

Method used

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  • Method for preparing porous carbon materials with different morphologies through ultrasonic spray pyrolysis regulation and control
  • Method for preparing porous carbon materials with different morphologies through ultrasonic spray pyrolysis regulation and control
  • Method for preparing porous carbon materials with different morphologies through ultrasonic spray pyrolysis regulation and control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, the blood cell-like porous carbon prepared by controlling different proportions through ultrasonic atomization specifically includes the following steps:

[0045](1) Weigh 3g of sucrose and dissolve it in 50ml of deionized water, weigh 1g of zinc nitrate solid, dissolve it in the sucrose solution, and ultrasonicate it for 0.5h at room temperature to make a uniformly dispersed solution to obtain sucrose: zinc nitrate=3: 1 precursor solution.

[0046] (2) The precursor solution is atomized into droplets through an ultrasonic atomizer, and loaded into a preheated tube furnace (700°C) with an inert gas at a certain flow rate, and the droplets undergo solvent evaporation in the tube furnace, Droplet concentration, dry crystallization and thermal decomposition processes, finally forming solid powder particles.

[0047] (3) Wash the collected solid particles with deionized water, suction filter, dry, grind and other processes, and then prepare an acid solutio...

Embodiment 2

[0050] This example is the same as Example 1, except that the weighed sucrose and zinc nitrate are 1g and 1g respectively, and the other steps are identical.

[0051] The porous carbon material SEM experiment result of the porous carbon that present embodiment prepares has spherical appearance is as follows figure 2 shown.

Embodiment 3

[0053] This example is the same as Example 1, except that the weighted sucrose and zinc nitrate are 1g and 2g respectively, and the other steps are identical.

[0054] The porous carbon material prepared in this example has pomegranate-like appearance SEM experimental results as follows image 3 shown.

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Abstract

The invention discloses a method for preparing porous carbon materials with different morphologies by ultrasonic spray pyrolysis regulation and control. The method comprises the following steps: dissolving a soluble metal salt and a soluble sugar in water to prepare a precursor solution; ultrasonically atomizing the precursor solution into fog drops, and then introducing the fog drops into pyrolysis equipment by using a carrier gas for pyrolysis to obtain a metal oxide composite porous carbon material; and dissolving and cleaning the metal oxide in the metal oxide composite porous carbon material with an acid to obtain the porous carbon materials with different morphologies. The porous carbon materials with different morphologies can be regulated and controlled by changing the proportion of precursors, and the porous carbon materials with different specific surface areas and pore diameters are obtained. The prepared material is attractive in appearance and uniform in size distribution,the method has the advantages of being simple in process, easy to control in reaction, low in cost and free of pollution, a large number of good porous carbon materials with different appearances canbe continuously prepared, and the method is very suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of porous carbon materials, in particular to a method for preparing porous carbon materials with different shapes. Background technique [0002] Porous carbon has received extensive attention in different fields. There are more porosity in its structure and some corresponding excellent properties. Its pore size is adjustable and controllable. At the same time, it has high specific surface area and large adsorption capacity. Catalysis, adsorption and separation, batteries and many other fields have broad application prospects. Its carbonaceous material has excellent properties such as light weight, high toughness, high modulus, good stability, and adsorption capacity. [0003] The commonly used methods in the preparation of porous carbon are: activation method, organogel carbonization method, polymer blend carbonization method, template method and biomass carbonization method. The above preparation methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01P2004/03C01P2004/04C01P2006/17C01B32/05
Inventor 刘继磊李维则范彬彬陈小华高鹏刘辉张睿
Owner HUNAN UNIV
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