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Method for preparing lead titanate nano column automatically assembled by perovskite structure nano pieces

A perovskite structure, lead titanate technology, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., to achieve the effects of easy control, simple process and easy production

Inactive Publication Date: 2010-01-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, there are no reports or patents on self-assembled lead titanate nanocolumns of perovskite structure nanosheets.

Method used

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  • Method for preparing lead titanate nano column automatically assembled by perovskite structure nano pieces
  • Method for preparing lead titanate nano column automatically assembled by perovskite structure nano pieces

Examples

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Effect test

example 1

[0023] 1) According to the chemical formula PbTiO of the lead titanate nanorod to be synthesized 3 Measure and weigh tetrabutyl titanate and lead nitrate, dissolve them in absolute ethanol and deionized water respectively, prepare the absolute ethanol solution of tetrabutyl titanate and the aqueous solution of lead nitrate, and adjust the Ti in the solution 4+ ions and Pb 2+ The ion concentration is 0.1mol / L.

[0024] 2) In the state of stirring, the ammonia solution with a concentration of 0.1mol / L is added dropwise to the ethanol solution of tetrabutyl titanate prepared in step 1), so that the tetrabutyl titanate is hydrolyzed, and titanium ions are precipitated to obtain A suspension containing titanium oxyhydroxide precipitates; the volume ratio of the ammonia solution used to the ethanol solution of tetrabutyl titanate is 0.5;

[0025] 3) In the state of stirring, continue to add ammonia solution to the suspension containing titanium oxyhydroxide precipitate prepared in...

example 2

[0030] 1) According to the chemical formula PbTiO of the lead titanate nanorod to be synthesized 3 Measure and weigh tetrabutyl titanate and lead nitrate, dissolve them in absolute ethanol and deionized water respectively, prepare the absolute ethanol solution of tetrabutyl titanate and the aqueous solution of lead nitrate, and adjust the Ti in the solution 4+ ions and Pb 2+ The ion concentration is 0.3mol / L.

[0031] 2) In the state of stirring, the ammonia solution with a concentration of 0.6mol / L is added dropwise to the ethanol solution of tetrabutyl titanate prepared in step 1), so that the tetrabutyl titanate is hydrolyzed, and titanium ions are precipitated to obtain The suspension of the oxyhydroxide precipitation of titanium; The volume ratio of the ammonia solution used and the ethanol solution of tetrabutyl titanate is 1.0;

[0032]3) In the state of stirring, continue to add ammonia solution to the suspension containing titanium oxyhydroxide precipitate prepared ...

example 3

[0037] 1) According to the chemical formula PbTiO of the lead titanate nanorod to be synthesized 3 Measure and weigh tetrabutyl titanate and lead nitrate, dissolve them in absolute ethanol and deionized water respectively, prepare the absolute ethanol solution of tetrabutyl titanate and the aqueous solution of lead nitrate, and adjust the Ti in the solution 4+ ions and Pb 2+ The ion concentration is 0.25mol / L.

[0038] 2) In the state of stirring, the ammonia solution with a concentration of 0.4mol / L is added dropwise to the ethanol solution of tetrabutyl titanate prepared in step 1), so that the tetrabutyl titanate is hydrolyzed, and titanium ions are precipitated to obtain The suspension of the oxyhydroxide precipitation of titanium; The volume ratio of the ammonia solution used and the ethanol solution of tetrabutyl titanate is 1.5;

[0039] 3) In the state of stirring, continue to add ammonia solution to the suspension containing titanium oxyhydroxide precipitate prepare...

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Abstract

The invention relates to a method for preparing a lead titanate nano column automatically assembled by perovskite structure nano pieces. A titanium and lead oxyhydroxide mixed sediment for hydrothermal reaction is prepared by a two-step precipitation method. The method comprises the following steps: hydrolyzing tetrabutyl titanate by ammonia solution to precipitate titanium ions; introducing lead nitrate in the ammonia solution suspended with a titanium oxyhydroxide sediment to precipitate lead ions; after the mixed sediment is filtered and washed, mixing the mixed sediment, potassium hydroxide and deionized water; and carrying out hydro-thermal treatment in a sealed reaction kettle at 160-240 DEG C for 5-48 hours to obtain the lead titanate nano column automatically assembled by the perovskite structure lead titanate nano pieces. The lead titanate nano column is 5-20 microns in length and 0.4-1 micron in diameter, and the perovskite structure lead titanate nano pieces of the lead titanate nano column are 2-10 microns in thickness. The invention has simple technology process, no pollution as well as low cost and is easy to control and carry out mass production.

Description

technical field [0001] The invention relates to a preparation method of a perovskite structure nanosheet self-assembled lead titanate nanocolumn, belonging to the field of inorganic non-metallic materials. Background technique [0002] Since the discovery that semiconductor nanocrystals have superior properties than their bulk counterparts, a great deal of research has been done on nanomaterials. In recent years, the research on nanomaterials has been extended to control the shape of nanomaterials and explore the relationship between the properties of nanomaterials and their shape. Many studies have confirmed that the shape and size of nanomaterials are two key factors that determine the properties of materials. Although many methods have been successfully applied to control the shape of nanostructures of metal materials, semiconductor materials, and metal oxide materials, the shape-controlled preparation of nanocrystals of inorganic non-metallic materials is still a challe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
Inventor 徐刚何万波江伟李卓斌任召辉魏晓韩高荣沈鸽
Owner ZHEJIANG UNIV
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