A kind of preparation method of strontium titanate nanopowder

A technology of nano-powder and strontium titanate, which is applied in the field of nanotechnology, can solve the problem that the shape control of strontium titanate nano-powder cannot be taken into account at the reaction temperature, and achieve lower molten salt reaction temperature, low production cost, and simple production equipment Effect

Inactive Publication Date: 2016-04-27
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of strontium titanate nanopowder in order to solve the above technical problems such as the reaction temperature in the preparation process of strontium titanate nanopowder and the shape control of the finally obtained strontium titanate nanopowder. The preparation method is to prepare strontium titanate nanopowder by the ternary system molten salt method. This method has the advantages of low reaction temperature of the molten salt. agent, and finally get strontium titanate nanopowder with specific shape

Method used

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  • A kind of preparation method of strontium titanate nanopowder
  • A kind of preparation method of strontium titanate nanopowder
  • A kind of preparation method of strontium titanate nanopowder

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Embodiment 1

[0033] A preparation method of strontium titanate nanopowder, specifically comprising the following steps:

[0034] (1) At room temperature, grind and mix 1.48g strontium source, 0.8g titanium source, 1.14gNaCl, 1.14gKCl and 1.14g tertiary molten salt in an agate mortar and put them in a corundum crucible, then place the corundum crucible Put it into a muffle furnace to control the temperature at 650°C for molten salt reaction for 6 hours, and naturally cool to room temperature after the reaction to obtain a reaction liquid;

[0035] The amount of strontium source, titanium source, NaCl and KCl used in the above reaction process is calculated by mass ratio, that is, the total mass of strontium source and titanium source: the total mass of NaCl and KCl is 1:1;

[0036] Among them, the strontium source and titanium source are calculated according to the molar ratio of strontium and titanium, that is, strontium: titanium is 1:1;

[0037] The amount of tertiary molten salt used i...

Embodiment 2

[0045] A preparation method of strontium titanate nanopowder, specifically comprising the following steps:

[0046] (1) At room temperature, grind and mix 1.48g strontium source, 0.8g titanium source, 1.14gNaCl, 1.14gKCl and 1.14g tertiary molten salt in an agate mortar and put them in a corundum crucible, then place the corundum crucible Put it into a muffle furnace to control the temperature at 650°C for molten salt reaction for 6 hours, and naturally cool to room temperature after the reaction to obtain a reaction liquid;

[0047] The amount of strontium source, titanium source, NaCl and KCl used in the above reaction process is calculated by mass ratio, that is, the total mass of strontium source and titanium source: the total mass of NaCl and KCl is 1:1;

[0048] Among them, strontium source and titanium source are calculated according to the molar ratio of strontium and titanium, that is, strontium:titanium is 1:1;

[0049] The amount of tertiary molten salt used is cal...

Embodiment 3

[0057] A preparation method of strontium titanate nanopowder, specifically comprising the following steps:

[0058] (1) At room temperature, grind and mix 1.77g strontium source, 0.8g titanium source, 1.285gNaCl, 1.285gKCl and 1.285g tertiary molten salt in an agate mortar and put them in a corundum crucible, then place the corundum crucible Put it into a muffle furnace to control the temperature at 550°C for molten salt reaction for 8 hours, and naturally cool to room temperature after the reaction to obtain a reaction liquid;

[0059] The amount of strontium source, titanium source, NaCl and KCl used in the above reaction process is calculated by mass ratio, that is, the total mass of strontium source and titanium source: the total mass of NaCl and KCl is 1:1;

[0060] Among them, strontium source and titanium source are calculated according to the molar ratio of strontium and titanium, that is, strontium:titanium is 1.2:1;

[0061] The amount of tertiary molten salt used i...

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Abstract

The invention discloses a preparation method of strontium titanate nanopowder. That is, strontium carbonate, strontium nitrate, strontium oxide or strontium chloride are used as the strontium source, anatase titanium dioxide is used as the titanium source, NaCl-KCl binary eutectic salt is used as the basic molten salt, and the tertiary molten salt sodium nitrate, Sodium sulfate, trisodium citrate dihydrate or sodium hydroxide are introduced into anionic functional groups as guiding agents, and the strontium titanate nanopowder is prepared by a molten salt method. Nanopowders with different shapes can be obtained by changing the type of tertiary molten salt during the preparation process. The preparation method of the nano-powder has the advantage of significantly lowering the reaction temperature, and the synthesis process and required production equipment are simple, and it is easy to realize industrial production.

Description

technical field [0001] The invention relates to a preparation method of strontium titanate nano powder, which belongs to the field of nano science and technology. technical background [0002] With the continuous development of nanotechnology, people have a strong interest in catalyst synthesis methods with simple operation and low cost, because it has a very wide range of applications in the field of industrial synthesis, especially molten salt synthesis, which has low synthesis temperature, It has the advantages of simple and convenient operation, low cost and recyclable molten salt. [0003] Strontium titanate has the 2 The similar electronic structure is a kind of photocatalytic material with application prospect. As a functional material, strontium titanate has the characteristics of high band gap (3.4eV), excellent photocatalytic activity, etc., and has unique electromagnetic properties and redox catalytic activity. and CO 2 It has also been widely used in the fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00B82Y30/00
Inventor 赵喆李翠萍郭强胜
Owner SHANGHAI INST OF TECH
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