Preparation method of nano flaky ferroelectric material for photocatalysis

A technology of nano-flaky and ferroelectric materials, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve serious powder agglomeration, excessively large powder particles, and powder crystallization In order to avoid problems such as poor stability, achieve the effects of reducing agglomeration, good crystallinity, and small particle size

Inactive Publication Date: 2014-01-22
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of too large powder particles, too serious powder agglomeration and poor powder crystallinity in the existing technology of strontium barium titanate powder synthesis, and on this basis, combine sol-gel method and traditional water Advantages of thermal method, use butyl titanate as raw material to synthesize sheet-like nano-strontium barium titanate powder by hydrothermal method

Method used

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  • Preparation method of nano flaky ferroelectric material for photocatalysis
  • Preparation method of nano flaky ferroelectric material for photocatalysis
  • Preparation method of nano flaky ferroelectric material for photocatalysis

Examples

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Embodiment 1

[0031] A kind of preparation method of photocatalytic nano flake ferroelectric material namely barium strontium titanate, with Ba 0.7 Sr 0.3 TiO 3 For example, calculated by molar ratio, barium in barium salt: strontium in strontium salt: titanium in butyl titanate: sodium hydroxide is 0.7:0.3:1:4; the barium salt used is BaCl 2 .2H 2 O, strontium salt as SrCl 2 .2H 2 O.

[0032] Weigh 1.7186g BaCl 2 .2H 2 O, 0.8039g SrCl 2 .2H 2 O, transfer the two raw materials into the Erlenmeyer flask, add 25ml deionized water and stir to dissolve, add 1.6667g NaOH to the above solution, stir and dissolve to form a strong alkali environment.

[0033] Use a measuring cylinder to take 3.4ml of butyl titanate, add an appropriate amount of absolute ethanol to form an ethanol solution of butyl titanate, pour the ethanol solution into the above-mentioned Erlenmeyer flask, and stir for 30 minutes on a constant temperature magnetic stirrer at a speed of 600r / min. Then transfer the suspen...

Embodiment 2

[0035] A kind of preparation method of photocatalytic nano flake ferroelectric material namely barium strontium titanate, with Ba 0.7 Sr 0.3 TiO 3 For example, calculated by molar ratio, barium in barium salt: strontium in strontium salt: titanium in butyl titanate: sodium hydroxide is 0.7:0.3:1:4; the barium salt used is BaCl 2 .2H 2 O, strontium salt as SrCl 2 .2H 2 O.

[0036] Weigh 1.7186g BaCl 2 .2H 2 O, 0.8039g SrCl 2 .2H 2O, transfer the two raw materials into the Erlenmeyer flask, add 25ml deionized water and stir to dissolve, add 1.6667g NaOH to the above solution, stir and dissolve to form a strong alkali environment.

[0037] Use a measuring cylinder to take 3.4ml of butyl titanate, add an appropriate amount of absolute ethanol to form an ethanol solution of butyl titanate, pour the ethanol solution into the above-mentioned Erlenmeyer flask, and stir for 30 minutes on a constant temperature magnetic stirrer at a speed of 600r / min. Then transfer the suspens...

Embodiment 3

[0039] A kind of preparation method of photocatalytic nano flake ferroelectric material namely barium strontium titanate, with Ba 0.7 Sr 0.3 TiO 3 For example, calculated by molar ratio, barium in barium salt: strontium in strontium salt: titanium in butyl titanate: sodium hydroxide is 0.7:0.3:1:4; the barium salt used is Ba(NO 3 ) 2 , the strontium salt is Sr(NO 3 ) 2 .

[0040] Weigh 1.8295g Ba(NO 3 ) 2 , 0.6349g Sr(NO 3 ) 2 , Transfer the two raw materials into a Erlenmeyer flask, add 25ml deionized water and stir to dissolve, add 1.6667g NaOH to the above solution, stir and dissolve to form a strong alkali environment.

[0041] Use a measuring cylinder to take 3.4ml of butyl titanate, add an appropriate amount of absolute ethanol to form an ethanol solution of butyl titanate, pour the ethanol solution into the above-mentioned Erlenmeyer flask, and stir for 30 minutes on a constant temperature magnetic stirrer at a speed of 600r / min. Then transfer the suspension i...

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Abstract

The invention relates to a preparation method of a nano flaky ferroelectric material for photocatalysis. The preparation method comprises the steps of preparing barium salt, strontium salt and titanium salt to obtain premix according to a barium strontium titanate (BaxSr1-xTiO3) molecular formula, mixing barium salt and strontium salt according to proportions and dissolving in water, adding NaOH, dissolving titanium salt in absolute ethyl alcohol, uniformly mixing the raw materials, carrying out thermal reaction for 24 hours in a high-pressure kettle at 160-200 DEG C, cooling to room temperature in air, filtering, washing and drying the mixture to obtain nano flaky barium strontium titanate powder. Compared with the prior art, the preparation method has the advantages that the process is simple and few aggregation phenomena of prepared nano particles exist; in comparison with barium strontium titanate nano powder prepared by a conventional hydrothermal method, the preparation method, which adopts butyl titanate as a titanium source, has the characteristics of high purity of a prepared sample, good crystallinity of powder and the like.

Description

technical field [0001] The invention relates to the preparation technology of sheet-shaped nano-ferroelectric materials, in particular to a preparation method of nano-sheet-shaped ferroelectric materials for photocatalysis. Background technique [0002] With the development of science and technology, the environmental pollution caused by the industrial field, especially the textile industry, has gradually intensified, and water pollution has become an urgent problem to be solved. With the research on treatment methods, photocatalytic degradation of organic matter has gradually gained attention due to its advantages of high efficiency, low cost, and energy saving. Since the discovery of TiO in 1972 2 Since the ability to split water to produce hydrogen by relying on light energy, people have become very interested in using photocatalytic technology to control water pollution. After decades of development, many semiconductor photocatalysts have been prepared. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y40/00B82Y30/00
Inventor 曾涛白杨漏琦伟姚伟峰沈喜训吴江
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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