Double perovskite type inorganic nano fiber and preparation method thereof

An inorganic nanofiber, double perovskite technology, applied in the direction of inorganic raw materials such as artificial filaments, can solve the problem of insufficient research on the properties of inorganic nanofibers, and achieve large aspect ratio, increase specific surface area, and high specific surface area. Effect

Inactive Publication Date: 2015-01-28
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, previous research directions mainly focused on ordinary perovskite (ABO 3 ) Preparation and application of nanoparticles and na...

Method used

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  • Double perovskite type inorganic nano fiber and preparation method thereof
  • Double perovskite type inorganic nano fiber and preparation method thereof
  • Double perovskite type inorganic nano fiber and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0040] A double perovskite La 2 CaO 6 A preparation method for inorganic nanofibers, the preparation method comprising the steps of:

[0041] ①Dissolve 10% inorganic salt in 76% N,N-dimethylformamide by mass percentage and add 14% polyvinylpyrrolidone. The inorganic salt is a mixture of lanthanum nitrate, cobalt acetate and nickel acetate. The mol ratio of described lanthanum nitrate, cobalt acetate and nickel acetate is 2:1:1, obtains spinning precursor solution;

[0042] ② Electrospinning the spinning precursor solution, the electrospinning conditions are: the spinning voltage is 15kV, the curing distance from the nozzle to the receiving screen is 15cm, and the receiving time is 12h, to obtain composite nanofibers;

[0043] ③ pre-oxidize the composite nanofibers in air, the pre-oxidation conditions are: the pre-oxidation temperature is 220°C, the pre-oxidation time is 1h, the pre-oxidation heating rate is 1°C / min, and the pre-oxidation composite nanofibers are obtained;

...

Embodiment 2

[0047] A double perovskite La 2 CoFeO 6 A preparation method for inorganic nanofibers, the preparation method comprising the steps of:

[0048] ①Dissolve 10% inorganic salt in 76% N,N-dimethylformamide by mass percentage and add 14% polyvinylpyrrolidone. The inorganic salt is a mixture of lanthanum nitrate, cobalt acetate and iron nitrate. The mol ratio of described lanthanum nitrate, cobalt acetate and nickel acetate is 2:1:1, obtains spinning precursor solution;

[0049] ② Electrospinning the spinning precursor solution, the electrospinning conditions are: the spinning voltage is 15kV, the curing distance from the nozzle to the receiving screen is 15cm, and the receiving time is 12h, to obtain composite nanofibers;

[0050] ③ pre-oxidize the composite nanofibers in air, the pre-oxidation conditions are: the pre-oxidation temperature is 220°C, the pre-oxidation time is 1h, the pre-oxidation heating rate is 1°C / min, and the pre-oxidation composite nanofibers are obtained;

...

Embodiment 3

[0054] A double perovskite La 2 CoMnO 6 A preparation method for inorganic nanofibers, the preparation method comprising the steps of:

[0055] ①Dissolve 10% inorganic salt in 76% N,N-dimethylformamide by mass percentage and add 14% polyvinylpyrrolidone. The inorganic salt is a mixture of lanthanum nitrate, cobalt acetate and manganese acetate. The mol ratio of described lanthanum nitrate, cobalt acetate and manganese acetate is 2:1:1, obtains spinning precursor solution;

[0056] ② Electrospinning the spinning precursor solution, the electrospinning conditions are: the spinning voltage is 15kV, the curing distance from the nozzle to the receiving screen is 15cm, and the receiving time is 12h, to obtain composite nanofibers;

[0057] ③ pre-oxidize the composite nanofibers in the air, the pre-oxidation conditions are: the pre-oxidation temperature is 220°C, the pre-oxidation time is 1h, the pre-oxidation heating rate is 1°C / min, and the pre-oxidation composite nanofibers are ...

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Abstract

The invention relates to double perovskite type inorganic nano fiber and a preparation method thereof and belongs to the field of inorganic nano fiber materials. The preparation method comprises the following steps: mixing polyvinylpyrrolidone with a solvent to obtain a spinning precursor solution, and performing electrostatic spinning, preoxidation and carbonization to the spinning precursor solution to obtain the double perovskite type inorganic nano fiber; the spinning precursor solution comprises the following components in mass percent: 10% to 20% of inorganic salt, 10% to 30% of polyvinylpyrrolidone and the balance of solvent, wherein the inorganic salt is the mixture of lanthanum salt, cobalt salt and metal salt III, the molar ratio of the lanthanum salt, the cobalt salt and the metal salt III is 2:1:1, and the metal salt III is nickel salt, ferric salt or manganese salt. The invention has the advantages that the preparation method is simple and easy to implement, the raw material consumption is low, the product purity is high, and the obtained double perovskite type inorganic nano fiber has a stable one-dimensional structure, is relatively high in draw ratio and uniform in diameter.

Description

technical field [0001] The invention relates to a double perovskite inorganic nanofiber and a preparation method thereof, belonging to the field of inorganic nanofiber materials. Background technique [0002] Perovskite-type oxides have a unique crystal structure. Therefore, it shows many special physical and chemical properties, especially in terms of magnetism, electrical conductivity, surface properties, catalytic activity, etc. It is an important material, which has attracted the attention of countries all over the world. As a new type of semiconductor compound, perovskite oxides have been widely used in many fields due to their simple process, low cost, and flexible "chemical tailoring" in terms of element composition and crystal structure. Wide range of applications. In particular, perovskite inorganic nanofibers have the advantages of high specific surface area, large aspect ratio, and not easy to agglomerate, and have broad application prospects in optoelectronics,...

Claims

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Application Information

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IPC IPC(8): D01F9/08
Inventor 吴艳波毕军宋铁犇韩笑梅张月
Owner DALIAN JIAOTONG UNIVERSITY
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