Preparation method of strontium titanate nano material with adjustable morphology

A nanomaterial, strontium titanate technology, applied in the field of preparation of strontium titanate nanomaterials, can solve the problems of low orientation, narrow range, performance deterioration, etc., and achieve the effects of high photocatalytic efficiency, simple preparation process, and simple raw materials

Inactive Publication Date: 2020-07-31
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To solve the SrTiO of the existing process 3 Nanomaterials have uncontrollable morphology, excessively large particle size, and a relatively narrow controllable range, resulting in problems such as

Method used

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  • Preparation method of strontium titanate nano material with adjustable morphology
  • Preparation method of strontium titanate nano material with adjustable morphology
  • Preparation method of strontium titanate nano material with adjustable morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) During the synthesis of strontium titanate nanoparticles, 1 mmol of strontium nitrate was dissolved in 5 mL of deionized water, 12.5 mmol of sodium hydroxide was dissolved in 5 mL of deionized water, and 1 mmol of n-butyl titanate was dissolved in 5 mL of anhydrous butanol 1.5mmol oleic acid was dissolved in 5mL anhydrous butanol, and strontium nitrate aqueous solution, sodium hydroxide aqueous solution, n-butyl titanate anhydrous butanol solution, oleic acid anhydrous butanol solution were prepared;

[0028] 2) Mix the configured solutions together and then transfer the resulting solution to a 50mL polytetrafluoroethylene-lined stainless steel autoclave;

[0029] 3) Seal the autoclave, then heat at 200°C for 24h, and cool to room temperature naturally after the reaction;

[0030] 4) The obtained product was centrifuged at 3000 round / min for 5 minutes, the supernatant was discarded, and the precipitate was ultrasonically cleaned in acetone, alcohol, and deionized wat...

Embodiment 2

[0032] Using the same process as in Example 1, the difference is that the amount of oleic acid added in step 1) of Example 1 is changed to 0.5 mmol, and other conditions remain the same.

Embodiment 3

[0034] The same process as in Example 1 is adopted, the difference is that the amount of oleic acid added in step 1) of Example 1 is changed to 3 mmol, and other conditions remain the same.

[0035] By adjusting the content of oleic acid, the shape of micelles formed by the self-assembly of oleic acid molecules in the reaction system can be changed, and the SrTiO formed in the initial stage of the reaction 3 Oriented assembly of nanocrystallites in micelles of different shapes, resulting in SrTiO with different morphologies 3 nanomaterials.

[0036] Test the SrTiO prepared in 1~3 respectively 3 In order to compare the catalytic performance of nanomaterials, commercially available strontium titanate nanopowder (Aldrich, 30nm) was also used to degrade methylene blue, a common dye, under the same conditions. Degradation effect such as Figure 4 As can be seen from the figure, the synthesized SrTiO of the present invention 3 The catalytic activity of the nanomaterials is highe...

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Abstract

The invention discloses a preparation method of a strontium titanate nano material with an adjustable morphology. The method comprises the following steps: uniformly mixing a strontium nitrate solution, a sodium hydroxide solution, a butyl alcohol solution of n-butyl titanate and a butyl alcohol solution of oleic acid, and carrying out a hydrothermal reaction at 100-200 DEG C for 6-24 hours to obtain the strontium titanate nano material. Through the influence of micelles formed by self-assembly of oleic acid molecules on the dynamic behavior of directional adsorption of SrTiO3 nano micro-crystals, the morphology is finally regulated and controlled, and the prepared SrTiO3 nano material is good in dispersity, high in photocatalytic efficiency and beneficial to later application of photocatalytic devices.

Description

technical field [0001] The invention relates to a method for preparing a strontium titanate nanomaterial with adjustable morphology, belonging to the technical field of nanomaterial preparation Background technique [0002] Strontium titanate (SrTiO 3 ), as a typical perovskite metal oxide, is a widely used electronic functional ceramic material, which has the characteristics of good thermal stability, low dielectric loss and high dielectric constant. played an important role in the application of materials. SrTiO 3 With good photocatalytic activity and suitable band gap (3.2-3.8eV), it has broad application prospects in the fields of photochemical cells, photocatalytic hydrolysis, and photocatalytic degradation of organic pollutants. SrTiO 3 The growth process and morphology control of crystals have an important impact on their physicochemical properties, since their structure dependence can be tuned by controlling the growth parameters and process. [0003] During nan...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82Y40/00B01J23/02
CPCC01G23/006B82Y40/00B01J23/02B01J35/004C01P2004/24
Inventor 蔺博文丛振华丁浩柏
Owner NANJING UNIV OF SCI & TECH
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