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Preparation method of strontium titanate nano powder

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 at the reaction temperature cannot be taken into account, and achieve the goals of lowering the molten salt reaction temperature, low production cost, and easy control Effect

Inactive Publication Date: 2014-12-10
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

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  • Preparation method of strontium titanate nano powder

Examples

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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, 1.14g NaCl, 1.14g KCl and 1.14g tertiary molten salt in an agate mortar and put them in a corundum crucible, then place The corundum crucible was placed in a muffle furnace to control the temperature at 650°C for molten salt reaction for 6 hours, and after the reaction was completed, it was naturally cooled to room temperature to obtain a reaction solution;

[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 ...

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, 1.14g NaCl, 1.14g KCl and 1.14g tertiary molten salt in an agate mortar and put them in a corundum crucible, then place The corundum crucible was placed in a muffle furnace to control the temperature at 650°C for molten salt reaction for 6 hours, and after the reaction was completed, it was naturally cooled to room temperature to obtain a reaction solution;

[0047] The amount of strontium source, titanium source, NaCl and KCl used in the above-mentioned reaction process is calculated by mass ratio, i.e. 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...

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, 1.285g NaCl, 1.285g KCl and 1.285g tertiary molten salt in an agate mortar and put them in a corundum crucible, then put The corundum crucible was placed in a muffle furnace to control the temperature at 550°C for molten salt reaction for 8 hours, and after the reaction was completed, it was naturally cooled to room temperature to obtain a reaction solution;

[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...

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Abstract

The invention discloses a preparation method of strontium titanate nano powder. The method comprises the following steps: by using strontium carbonate, strontium nitrate, strontium oxide or strontium chloride as a strontium source, anatase titanium dioxide as a titanium source and NaCl-KCl two-element eutectic salt as a basic molten salt, adding a third-element molten salt sodium nitrate, sodium sulfate, trisodium citrate dihydrate or sodium hydroxide, introducing anionic functional group as a guide agent, and carrying out a molten salt process to obtain the strontium titanate nano powder. The variety of the third-element molten salt can be changed in the preparation process to obtain the nano powder with different shapes. The preparation method obviously lowers the reaction temperature, is simple in synthesis technique and required production equipment, and can easily implement 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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IPC IPC(8): C01G23/00B82Y30/00
Inventor 赵喆李翠萍郭强胜
Owner SHANGHAI INST OF TECH
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