Preparation method of beta-type bismuth oxide

A technology of bismuth oxide and bismuth nitrate, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve the problems of easy substitution of impurities, easy agglomeration of powder, uneven particle size distribution, etc., to achieve high purity and reduce synthesis Effect of temperature, nodule rate stabilization

Active Publication Date: 2018-03-30
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is simple, low energy consumption, but the obtained powder is easy to agglomerate, the particle size distribution is uneven, and it is easy to substitute impurities.

Method used

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  • Preparation method of beta-type bismuth oxide
  • Preparation method of beta-type bismuth oxide
  • Preparation method of beta-type bismuth oxide

Examples

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Effect test

Embodiment 1

[0043] A kind of preparation method of bismuth oxide, adopts following steps:

[0044] (1), 0.05mol Bi(NO 3 ) 3 ·5H 2 O was added to 50.0ml of nitric acid solution with a concentration of 2mol / L, stirred, and the bismuth nitrate was fully dissolved and dispersed;

[0045] (2), weighing 0.005 g of anionic surfactant polyacrylamide, adding polyacrylamide to (1) bismuth nitrate solution, and stirring evenly; wherein, the particle diameter of polyacrylamide is 60 mesh to 80 mesh;

[0046] (3), the alcohol ether phosphate of 0.5ml is dripped in the sodium hydroxide solution that 50ml concentration is 2mol / L, after stirring and mixing, add in the solution of step (2) again, stir and mix again, use 2mol / L After the nitric acid or sodium hydroxide solution of L adjusts the pH value to 8, as the bismuth oxide precursor reflux liquid,

[0047] (4) Place the reflux liquid of the above-mentioned bismuth oxide precursor in a reflux device composed of a three-necked flask and a condense...

Embodiment 2

[0051] A kind of preparation method of bismuth oxide, adopts following steps:

[0052] (1), 0.1mol Bi(NO 3 ) 3 ·5H 2 O was added to 50.0ml of nitric acid solution with a concentration of 1.5mol / L, stirred at 500r / min, and stirred for 3min to fully dissolve and disperse the bismuth nitrate;

[0053] (2), weighing 0.01 g of anionic surfactant polyacrylamide, adding polyacrylamide into (1) bismuth nitrate solution, stirring speed is 500r / min, stirring for 3min, and mixing evenly; wherein, the particle size of polyacrylamide The diameter is 60 mesh to 80 mesh;

[0054] (3), 50ml concentration is that the potassium hydroxide solution of 3mol / L drops into the alcohol ether phosphate of 0.5ml, stirring speed is 500r / min, 3min mixes, add the solution of step (2), stirring speed is 500r / min min, after stirring for 5 minutes, and then adjusting the pH value to 10 with nitric acid and sodium hydroxide solution, as the reflux liquid of the bismuth oxide precursor,

[0055] (4), the a...

Embodiment 3

[0059] A kind of preparation method of bismuth oxide, adopts following steps:

[0060] (1), 0.075mol Bi(NO 3 ) 3 ·5H 2 O was added to 50.0ml of nitric acid solution with a concentration of 3mol / L, stirred, and the bismuth nitrate was fully dissolved and dispersed;

[0061] (2), weighing 0.03 g of anionic surfactant polyacrylamide, adding polyacrylamide to (1) bismuth nitrate solution, and stirring evenly; wherein, the particle diameter of polyacrylamide is 60 mesh to 80 mesh;

[0062] (3), drop 50ml of potassium hydroxide solution with a concentration of 2mol / L into 1ml of alcohol ether phosphate, stir and mix, then add in the solution of step (2), stir and mix, use nitric acid and sodium hydroxide After the pH value of the solution is adjusted to 11, as the reflux liquid of the bismuth oxide precursor,

[0063] (4) Place the above-mentioned bismuth oxide precursor reflux liquid in a reflux device composed of a three-necked flask and a condenser tube. The reflux device is ...

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Abstract

The invention relates to a preparation method of beta-type bismuth oxide. The preparation method comprises the following steps of S1, preparing a bismuth nitrate solution; S2, adding polyacrylamide tothe bismuth nitrate solution in the step S1 and stirring evenly; S3, disposing an alkaline solution with a concentration of 2-4 mol/L, adding alcohol ether phosphate ester, stirring and mixing, mixing the alkaline solution and the solution obtained in the step S2 in an equal volume ratio, stirring evenly, and adjusting the pH to 8-13 to obtain a bismuth oxide precursor refluxing liquid; S4, performing boiling reflux on the bismuth oxide precursor refluxing liquid with an oil bath, performing water condensation reflux to obtain the product; S5, washing, drying and grinding the product to obtain beta-type bismuth oxide powders. The preparation method adopts a boiling reflux method to prepare bismuth oxide with a single crystal form, greatly reduces the synthesis temperature of the powders,achieves standardized production, can effectively control the size, composition and morphology of crystal grains, and obtains high-purity beta-type bismuth oxide.

Description

technical field [0001] The invention relates to a preparation method of β-type bismuth oxide, belonging to the field of inorganic material preparation. Background technique [0002] With the rapid development of economy and the continuous progress of science and technology, people's demand for water quality and water quantity is increasing, which also increases the burden on the environment. Water pollution is becoming more and more serious. Photocatalytic materials have important application prospects in solving environmental problems. . Compared with traditional methods of environmental governance, photocatalytic materials can decompose organic pollutants into carbon dioxide and water, and have the advantages of low cost, high efficiency, and no secondary pollution. Bi 2 o 3 The bandwidth is 2.85eV, and it can be photocatalytically degraded under visible light conditions. It is an important semiconductor photocatalyst, so it also has many applications in the field of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00
CPCC01G29/00C01P2002/72C01P2004/03C01P2006/80
Inventor 杨焕平王磊孙志鹏
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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