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Synthesis method of mesoporous single crystal strontium titanate

A synthesis method and technology of strontium titanate, which are applied in the field of mesoporous single crystal strontium titanate materials, can solve the problems of complex process, unable to maintain mesoporous structure completely, structure collapse and the like, and achieve simple synthesis process, low synthesis and cost. low cost effect

Active Publication Date: 2020-04-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-temperature sintering leads to structural collapse, and the mesoporous structure cannot be completely maintained
The common hydrothermal method uses multi-step synthesis of mesoporous strontium titanate, which requires post-treatment of the template agent, and the process is relatively complicated

Method used

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  • Synthesis method of mesoporous single crystal strontium titanate
  • Synthesis method of mesoporous single crystal strontium titanate
  • Synthesis method of mesoporous single crystal strontium titanate

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Step 1. Preparation of mesoporous single crystal strontium titanate particles:

[0032] 0.5 mL of 10wt.% TiCl 3 Titanium trichloride solution dissolved in 20-30wt.% hydrochloric acid, dissolved in 25mL of deionized water, and stirred for 6 minutes, then 1.2g of ethylene glycol was added dropwise and vigorously stirred for 8 minutes; 3.5g of lithium hydroxide was dissolved In 30mL deionized water, stir until clear and ready to use. Lithium hydroxide solution was slowly added dropwise to TiCl with stirring 3 In the solution, a white emulsion was formed, which was then vigorously stirred for 20 minutes. Add 1.0 g of strontium chloride hexahydrate to the above emulsion, stir for 10 minutes and transfer to a polytetrafluoroethylene lining, seal it in a stainless steel reactor and keep warm at 185°C for 36 hours. Then cool naturally to room temperature, centrifuge to obtain the reactant, wash with deionized water and ethanol five times respectively, and dry in an oven at 6...

Embodiment 2

[0037] 1.0 mL of 10wt.% TiCl 3 Dissolve titanium trichloride solution in 20-30wt.% hydrochloric acid, dissolve in 25mL of deionized water, and stir for 8 minutes, then add 0.9g of ethylene glycol dropwise and stir vigorously for 10 minutes; dissolve 5.0g of lithium hydroxide In 30mL deionized water, stir until clear and ready to use. Lithium hydroxide solution was slowly added dropwise to the 3 The solution was stirred continuously to form a white emulsion, and stirred vigorously for 30 minutes. Add 0.8g of strontium chloride hexahydrate into the above emulsion, stir for 10 minutes and transfer to a polytetrafluoroethylene lining, seal it in a stainless steel reactor and keep it warm at 170°C for 48 hours. Then cool naturally to room temperature, centrifuge to obtain the reactant, wash with deionized water and ethanol five times respectively, and dry in an oven at 70° C. to obtain mesoporous single crystal strontium titanate.

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Abstract

The invention relates to a synthesis method of mesoporous single crystal strontium titanate. In the hydrothermal synthesis process of strontium titanate, spontaneously growing is performed to form mesoporous structures, and centrifugal drying is performed after the reaction is completed to obtain mesoporous single crystal strontium titanate powder. Synthesized strontium titanate single crystal particles are between 100 nanometers and 300 nanometers, have rough surfaces and porous structures, and have high specific surface areas. The single crystal particles with the mesoporous structure have very important application in the fields of environmental science and solar energy conversion.

Description

technical field [0001] The invention relates to a mesoporous single-crystal strontium titanate material with a high specific surface area, which is a single-crystal particle with a size of 100-300 nanometers, and the surface is rough and presents a porous structure. This single-crystal mesoporous material has very important applications in environmental science, solar energy conversion, and biological antibacterial. Background technique [0002] Energy shortage and environmental pollution are two important problems that plague the current development and survival of human beings. On the one hand, we must reduce the consumption of mineral resources and use renewable clean energy as much as possible; on the other hand, we must reduce pollutant emissions. Eliminate environmental pollution. Solar energy is clean energy, how to convert solar energy into energy that is convenient for us to use and how to use solar energy to eliminate environmental pollution has become a research ...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B7/10C02F1/30C02F101/36C02F101/38
CPCC02F1/30C02F2101/36C02F2101/38C02F2101/40C30B7/10C30B29/32
Inventor 杨化桂朱继平杨晓华刘鹏飞袁海洋白景阳
Owner EAST CHINA UNIV OF SCI & TECH
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