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Flower cluster shaped calcium vanadate microsphere and preparation method thereof

A technology of calcium vanadate and microspheres, applied in the field of flower cluster-shaped calcium vanadate microspheres and preparation thereof, can solve the problems of poor quality of calcium vanadate, cumbersome preparation process, pressure on production cost and the like, and achieves easy implementation, The effect of simple process and high shape qualification rate

Active Publication Date: 2019-04-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcium vanadate prepared by the existing single solvothermal method contains a large amount of by-products, which are easy to agglomerate, which makes the quality of the prepared calcium vanadate poor, and the preparation process is cumbersome, causing pressure on production costs

Method used

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  • Flower cluster shaped calcium vanadate microsphere and preparation method thereof
  • Flower cluster shaped calcium vanadate microsphere and preparation method thereof
  • Flower cluster shaped calcium vanadate microsphere and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Configure three solutions or reagents

[0040] a. Calcium acetate is dissolved in ethylene glycol to form a reaction solution A, wherein the concentration of the calcium source is 0.1mol / L;

[0041] b. Sodium vanadate is dissolved in deionized water to form reaction solution B, wherein the concentration of vanadium source is 0.1mol / L;

[0042] c. PVP is dissolved in ethylene glycol to form reaction solution C, wherein the concentration of PVP is 0.15mol / L;

[0043] (2) Take 30ml of reaction solution A, add it dropwise to 30ml of reaction solution B, and magnetically stir to form a mixed solution. 10ml of solution C was added dropwise to 60ml of the mixed solution, and magnetically stirred. The above mixed system was moved to the reactor, and reacted at 180°C for 24h. The reaction products were washed three times with ethanol, centrifuged at 5000 rpm for 15 min respectively, dried at 60° C. for 5 h, and dispersed in ethanol solution for preservation.

[0044] fi...

Embodiment 2

[0046] (1) Configure three solutions or reagents

[0047] a. Calcium acetate is dissolved in ethylene glycol to form a reaction solution A, wherein the concentration of the calcium source is 0.075mol / L;

[0048] b. Sodium vanadate is dissolved in deionized water to form reaction solution B, wherein the concentration of vanadium source is 0.15mol / L;

[0049] c. PVP is dissolved in ethylene glycol to form reaction solution C, wherein the concentration of PVP is 0.15mol / L;

[0050] (2) Take 40ml of reaction solution A, add it dropwise to 20ml of reaction solution B, and magnetically stir to form a mixed solution. 10ml of reaction solution C was added dropwise to 60ml of the mixed solution, and magnetically stirred. The above mixed system was moved to the reactor, and reacted at 180°C for 24h. The reaction products were washed three times with ethanol, centrifuged at 5000 rpm for 15 min respectively, dried at 60° C. for 5 h, and dispersed in ethanol solution for preservation. ...

Embodiment 3

[0053] (1) Configure three solutions or reagents

[0054] a. Calcium acetate is dissolved in ethylene glycol solution to form reaction solution A, wherein the concentration of calcium source is 0.1mol / L;

[0055] b. Sodium vanadate is dissolved in deionized water to form reaction solution B, wherein the concentration of vanadium source is 0.1mol / L;

[0056] c. PVP is dissolved in ethylene glycol solution to form reaction solution C, wherein the concentration of PVP is 0.15mol / L;

[0057] (2) Take 30ml of reaction solution A, add it dropwise to 30ml of reaction solution B, and magnetically stir to form a mixed solution. 10ml of reaction solution C was added dropwise to 60ml of the mixed solution, and magnetically stirred. The above mixed system was moved to a reaction kettle and reacted at 180°C for 36h. The reaction products were washed three times with ethanol, centrifuged at 5000 rpm for 15 min respectively, dried at 60° C. for 5 h, and dispersed in ethanol solution for pre...

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Abstract

The invention discloses a flower cluster shaped calcium vanadate microsphere and a preparation method thereof. The method has the advantages of easy availability of raw materials, simple process, lowenergy consumption, less agglomeration and easy implementation, wherein ethylene glycol and water are used as double solvents, the flower cluster shaped calcium vanadate microsphere can be formed, andthe clusters in each flower cluster shaped calcium vanadate microsphere are more dense; by using double solvents, the overall reaction time is shortened; at that same time, a high-pressure reaction kettle is adopted, the temperature and pressure can be controlled, and the close reaction environment makes the size of the prepared flower cluster shaped calcium vanadate more uniform, and the qualification rate of the shape of the flower cluster shaped calcium vanadate microsphere is higher, and the prepared flower cluster shaped calcium vanadate microsphere are in the flower cluster shape, and the clusters are dense, so that the active sites in the microspheres are more and the specific surface area is larger; when the microspheres are applied to the conductive thin film materials, the ion transport rate of the microspheres is high, the electron transport ability is strong, and the conductive ability is strong because of the large number of active sites.

Description

【Technical field】 [0001] The invention belongs to the technical field of production of micro-nano materials, and in particular relates to a flower cluster calcium vanadate microsphere and a preparation method thereof. 【Background technique】 [0002] ITO has always been an important material for making flexible thin films, but its raw material indium is scarce, expensive, poor in mechanical stability, and low in work function, which cannot meet the higher requirements of optoelectronic devices in different fields for transparent conductive thin films. Therefore, scientists are looking for a Materials that can replace ITO. In recent years, researchers have discovered that calcium vanadate (CaVO 3 ) has great potential to replace ITO materials. Calcium vanadate (CaVO 3 ) The smaller the diameter, the better the light transmittance, so the research and development of calcium vanadate (CaVO 3 ) is of great significance. [0003] At present, there are many methods for preparin...

Claims

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Application Information

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IPC IPC(8): C01G31/00
CPCC01G31/00C01P2004/03C01P2004/32C01P2004/61
Inventor 迟聪聪王曌夏亮卢金锋张萌任超男张素风
Owner SHAANXI UNIV OF SCI & TECH
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