Method for preparing porous boric acid with coral structure

A technology of boric acid and coral, which is applied in the field of preparation of porous boric acid with coral structure, can solve the problems that it is difficult to meet the requirements of boric acid surface reactivity, high specific surface area and porosity, and achieve the effect of low cost and high yield

Active Publication Date: 2021-01-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the currently produced boric acid is lamellar crystal, which is difficult to meet the requirements of boric acid surface reactivity, high specific surface area and porosity. Therefore, it is necessary to develop and propose a preparation technology for porous boric acid

Method used

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  • Method for preparing porous boric acid with coral structure
  • Method for preparing porous boric acid with coral structure
  • Method for preparing porous boric acid with coral structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 80g of analytically pure boric acid into a pressure vessel equipped with 100g of mixed liquid solvent, wherein the mixed liquid solvent is prepared by ethanol, glycerol and water according to the above formula ratio; heat the pressure vessel to make the temperature reach 150°C to obtain a clear solution; then control the cooling rate 3-5°C / min, let the temperature drop to 20°C, let it stand for 1 hour, then raise it to 30-40°C at a heating rate of 2°C / min, let it stand for 30 minutes, then cool down to room temperature naturally, a large amount of white crystal liquid can be obtained, the Suction filter the feed liquid, and dry at 60°C to obtain coral-like porous boric acid powder, whose appearance is as follows: figure 1 shown; the X-ray diffraction pattern of the obtained powder is shown in figure 2 , which is in line with the standard card JCPDS No.30-0199 after analysis; the corresponding equilibrium adsorption curve is as follows image 3 It is shown that it ...

Embodiment 2

[0027] Add 30g of analytically pure boric acid into a pressure vessel containing 10g of a mixed solution solvent, wherein the mixed solution solvent is prepared from methanol, isopropanol and water according to the above formula ratio; heat the pressure vessel until the temperature reaches 80°C to obtain a clear solution; then control the cooling rate 2-3°C / min, let the temperature drop to 20°C, let it stand for 1 hour, then raise it to 40°C at a rate of 2-4°C / min, let it stand for 30 minutes, then cool down to room temperature naturally, a large amount of white crystal liquid can be obtained, the The feed liquid is suction filtered and dried at 60°C to obtain rich tubular porous coral structure boric acid, whose appearance is as follows: Figure 4 shown.

Embodiment 3

[0029] Add 45g of analytically pure boric acid into a pressure vessel equipped with 100g of mixed liquid solvent, wherein the mixed liquid solvent is prepared by ethanol, n-butanol and water according to the above formula ratio; heat the pressure vessel so that the temperature reaches 110°C to obtain a clear solution; then control the cooling rate 3-5°C / min, let the temperature drop to 5°C, stand for 1h, then increase the temperature at a rate of 3-5°C / min to 40°C for 1h, then cool naturally to room temperature, a large amount of white crystal solution can be obtained, the solution After suction filtration and drying at 60°C, the loose coral porous boric acid powder can be obtained, and its appearance is as follows: Figure 5 shown.

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Abstract

The invention belongs to the technical field of preparation of inorganic functional materials, and provides a method for preparing porous boric acid with a coral structure. According to the method, based on a coral reef structure forming mechanism in the ocean, cheap and easily-removed hydroxyl-containing organic molecules are selected as an inducer, and under the action of the organic induced molecules, the porous boric acid with the coral structure is obtained by changing the temperature gradient and the like in the dissolving, crystallizing and redissolving process. The method can realize uniform particle size of the boric acid product and safe and simple operation, and the porous structure can improve the surface reaction activity and the use efficiency. The method provides selectablematerial support for widening the application field of boric acid and improving the application performance of boric acid in the aspects of battery material and biological material design, catalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic functional materials, and relates to a preparation method of coral-structured porous boric acid. Background technique [0002] Inorganic porous materials have the advantages of small relative density, large specific surface area, and fast mass transfer rate. Coral-structured porous materials are a class of functional materials that have received special attention in recent years. They have shown great promise in new catalytic materials, biological materials, and battery materials. Huge and potential application prospects. [0003] Boron-containing chemicals such as boric acid exhibit properties such as stimuli-responsive luminescence, sterilization, heat conduction, and ion capture due to the electron-deficiency of boron and other electronic and structural characteristics. They are used in many fields such as battery materials, catalysis, biological materials, and medical diagnosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10
CPCC01B35/1045C01P2002/72C01P2004/03
Inventor 宁桂玲毕胜南朱培函叶俊伟田朋林源
Owner DALIAN UNIV OF TECH
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