Method for preparing strontium titanate nanoparticles

A technology of nano-particles and strontium titanate, which is applied in the direction of nanotechnology, chemical instruments and methods, titanium compounds, etc., can solve the problems of small particles without strontium titanate materials, non-orientation aggregation, etc., and achieve low cost and easy production Effect

Inactive Publication Date: 2011-08-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present there is no easy way to make the particles of strontium titanate material smaller without orientation aggregation

Method used

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  • Method for preparing strontium titanate nanoparticles

Examples

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example 1

[0021] 1) Dissolve tetrabutyl titanate in ethylene glycol methyl ether to adjust the Ti in the solution 4+ The ion concentration is 0.5mol / L

[0022] 2) Under stirring, add 1.5ml of ammonia solution with a mass concentration of 30% to the tetrabutyl titanate ethylene glycol methyl ether solution prepared in 1), precipitate, filter, and wash with deionized water for 6 times to obtain titanium Co-precipitation of oxyhydroxides;

[0023] 3) Dissolve strontium nitrate in deionized water to adjust the Sr in the solution 2+ The ion concentration is 1.5mol / L

[0024] 4) Potassium hydroxide is dissolved in deionized water, and the concentration of the configuration is 2mol / L potassium hydroxide aqueous solution

[0025] 5) Put 6g glucose at 180 o C hydrothermal reaction for 10h to obtain glucose hydrothermal decomposition solution

[0026] 6) Add titanium oxyhydroxide co-precipitation, strontium nitrate aqueous solution, glucose hydrothermal decomposition solution 20ml and potass...

example 2

[0029] 1) Dissolve tetrabutyl titanate in ethylene glycol methyl ether to adjust the Ti in the solution 4+ The ion concentration is 1mol / L

[0030] 2) Under stirring, add 1.5ml of ammonia solution with a mass concentration of 30% to the tetrabutyl titanate ethylene glycol methyl ether solution prepared in 1), precipitate, filter, and wash with deionized water for 6 times to obtain titanium Co-precipitation of oxyhydroxides;

[0031] 3) Dissolve strontium nitrate in deionized water to adjust the Sr in the solution 2+ The ion concentration is 2mol / L;

[0032] 4) Dissolve potassium hydroxide in deionized water, and prepare an aqueous potassium hydroxide solution with a concentration of 2 mol / L

[0033] 5) Put 6g glucose at 180 o C hydrothermal reaction for 10h to obtain glucose hydrothermal decomposition solution

[0034] 6) Add titanium oxyhydroxide co-precipitation, strontium nitrate aqueous solution, glucose hydrothermal decomposition solution 20ml and potassium hydroxide...

example 3

[0037] 1) Dissolve tetrabutyl titanate in ethylene glycol methyl ether to adjust the Ti in the solution 4+ The ion concentration is 0.6mol / L;

[0038] 2) Under stirring, add 1.5ml of ammonia solution with a mass concentration of 30% to the tetrabutyl titanate ethylene glycol methyl ether solution prepared in 1), precipitate, filter, and wash with deionized water for 6 times to obtain titanium Co-precipitation of oxyhydroxides;

[0039] 3) Dissolve strontium nitrate in deionized water to adjust the Sr in the solution 2+ The ion concentration is 2.4mol / L

[0040] 4) Dissolve potassium hydroxide in deionized water, and prepare an aqueous potassium hydroxide solution with a concentration of 2 mol / L

[0041] 5) Put 5g glucose at 160 o C hydrothermal reaction for 12h to obtain glucose hydrothermal decomposition solution

[0042] 6) Add titanium oxyhydroxide co-precipitation, strontium nitrate aqueous solution, glucose hydrothermal decomposition solution 20ml and potassium hydro...

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Abstract

The invention discloses a method for preparing strontium titanate nanoparticles. The method comprises the following steps of: adding a mineralizing agent, namely potassium hydroxide, with proper concentration, into hydrothermal reaction materials, namely titanium hydroxide coprecipitate and deionized water solution of strontium nitrate; introducing solution obtained by hydrothermally decomposing glucose into a hydrothermal system to influence nucleation and control the particle size of products; and synthesizing the strontium titanate nanoparticles of which the diameter is 20 to 50nm by hydrothermal reaction. The process is simple and is easy to control; the method is environment-friendly and low in cost; and the products are easy to produce.

Description

technical field [0001] The invention relates to a method for preparing strontium titanate nanoparticles, belonging to the field of inorganic non-metallic materials. Background technique [0002] Strontium-titanite-type oxides have natural strontium-titanite (CaTiO 3 ) structure, similar structures are square, rhomboid, tetragonal, monoclinic and triclinic. Strontium-titanite-type composite oxides have unique semiconductor properties. In recent years, the use of this property as a photocatalyst for photodegradation has attracted much attention. Due to the stable crystal structure, unique electromagnetic properties and high redox, hydrogenolysis, isomerization, electrocatalysis and other activities of this kind of compound, as a new type of functional material, it has great potential in the fields of environmental protection and industrial catalysis. Great development potential. [0003] In the standard strontium titanite, the A or B sites are replaced or partially replaced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y40/00
Inventor 韩高荣郑伟魏晓徐刚任召辉沈鸽翁文剑杜丕一赵高凌
Owner ZHEJIANG UNIV
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