Method for preparing oxide nano-materials by melted hydrated salt

A technology of nanomaterials and hydrated salts, applied in the field of functional oxide nanomaterials, can solve the problems of loss of water molecules, unseen nanomaterials, rising melting point, etc., and achieve the effects of avoiding pollution, reducing reaction temperature and high synthesis yield.

Inactive Publication Date: 2010-12-08
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is a problem with molten hydrated salts, it will decompose and gradually lose water molecules in an open system, resulting in a continuous increase in its melting point
At present, there are no relevant patents and literature reports on the synthesis of nanomaterials using molten hydrated salt solvents

Method used

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  • Method for preparing oxide nano-materials by melted hydrated salt
  • Method for preparing oxide nano-materials by melted hydrated salt
  • Method for preparing oxide nano-materials by melted hydrated salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Preparation of BaTiO by molten hydrated salt method 3 hollow nanoparticles

[0028] 12g Ba(OH) 2 ·8H 2 O was placed in a 23mL airtight polytetrafluoroethylene container and heated at 90°C for 1 hour to melt;

[0029] Then open the airtight container and quickly add 0.8g TiO 2 Powder, stir evenly with a polytetrafluoroethylene rod, then reseal the container, put it in a constant temperature box, and react at a temperature of 180 ° C for 3 hours;

[0030]After cooling, take out the obtained solid product, dissolve and wash it with hot water at 50°C, and use a high-speed centrifuge to centrifuge the obtained mixture to separate the insoluble product;

[0031] The insoluble product was alternately washed 3 times with 95% ethanol and deionized water, and dried under normal pressure at 60°C for 1 hour to obtain monodisperse BaTiO 3 Hollow nanoparticles, weighing not less than 2.2g, the remaining liquid after the insoluble product is separated, and the hydra...

Embodiment 2

[0033] Embodiment 2: Preparation of BaTiO by molten hydrated salt method 3 nanoparticles

[0034] 8g Ba(OH) 2 ·8H 2 O was placed in a 23mL airtight polytetrafluoroethylene container and heated at 110°C for 40 minutes to melt;

[0035] Then open the airtight container and quickly add 0.6g homemade rutile TiO 2 powder (the rutile TiO 2 Utilize the pair containing 0.15M TiCl 3 NaCl saturated aqueous solution was subjected to hydrothermal treatment for 3 hours), stirred evenly with a polytetrafluoroethylene rod, then resealed the container, put it into a constant temperature box, and reacted at a temperature of 160 ° C for 1 hour;

[0036] After cooling, the obtained solid product was taken out, dissolved and washed with 0.1M dilute acetic acid solution, and the obtained mixed solution was separated by high-speed centrifugation to separate the insoluble product;

[0037] The insoluble product was alternately washed 4 times with 95% ethanol and deionized water, and dried natu...

Embodiment 3

[0039] Embodiment 3: Preparation of SrTiO by molten hydrated salt method 3 nanoparticles

[0040] 12g SrCl 2 ·6H 2 O was placed in a 23mL airtight polytetrafluoroethylene container and heated at 130°C for 1 hour to melt;

[0041] Then open the airtight container and quickly add 1g TiO 2 , Stir evenly with a polytetrafluoroethylene rod, then re-seal the container, put it in an incubator, and react at a temperature of 170°C for 16 hours;

[0042] After cooling, take out the obtained solid product, dissolve and wash it with deionized water, and separate the insoluble product (particles larger than 200nm) from the obtained mixed solution with a vacuum pumping rate;

[0043] The insoluble product was alternately washed 3 times with 95% ethanol and deionized water, and dried in vacuum to obtain SrTiO 3 Nanoparticles, weighing no less than 2.1g, with a size of about 150-300 nanometers, the remaining liquid after the insoluble product is separated, and recrystallized to obtain a ...

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Abstract

The invention relates to a method for preparing oxide nano-materials by hydrated salt. The method is as follows: melted hydrated salt or compound melted hydrated salt is taken as solvent and reacts wiThe invention relates to a method for preparing oxide nano-materials by hydrated salt. The method is as follows: melted hydrated salt or compound melted hydrated salt is taken as solvent and reacts with metal oxides, metal halides, metal hydroxides or metal oxyacid salts under the closed reaction condition; and the oxide nano-materials are obtained by washing, separation and drying. By adopting thth metal oxides, metal halides, metal hydroxides or metal oxyacid salts under the closed reaction condition; and the oxide nano-materials are obtained by washing, separation and drying. By adopting the melted hydrated salt, the method is suitable for preparing simple binary oxides, and is more suitable for preparing complex ternary, quaternary and multi-component oxides. The method has the advantae melted hydrated salt, the method is suitable for preparing simple binary oxides, and is more suitable for preparing complex ternary, quaternary and multi-component oxides. The method has the advantages of large-scale preparation, environment protection, synthesis at low temperature, and the like, and is particularly suitable for the industrially large-scale and environmental-friendly preparationges of large-scale preparation, environment protection, synthesis at low temperature, and the like, and is particularly suitable for the industrially large-scale and environmental-friendly preparationof the oxide nano-materials. of the oxide nano-materials.

Description

technical field [0001] The invention belongs to the field of functional oxide nanometer materials, and relates to a new method for preparing oxide nanometer materials by a large amount and environment-friendly molten hydrated salt method. Background technique [0002] Oxide nanomaterials are the basis for the development of new optical, electrical, magnetic, catalytic and sensing functional materials, and have broad application prospects in the fields of information technology, energy, environment, medicine and national defense security. Common methods for synthesizing oxide nanomaterials include vapor deposition, solvothermal, sol-gel, and metal-organic thermal decomposition methods. However, using the above methods often involves organometallic precursors or organic solvents, and the amount of synthesized products is often on the milligram level. It is difficult to achieve a large amount of synthesis of nanomaterials, and it is not suitable for industrial promotion. In or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14C01B13/18
Inventor 潘世烈田雪林
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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