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Method for preparing nano bismuth oxide

A technology of bismuth oxide and bismuth salt, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds and other directions, can solve the problems of high production cost, large consumption of organic solvents and surfactants, etc., and achieves low production cost, convenient operation, Good chemical stability

Active Publication Date: 2008-05-14
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production cost of this method is high, and a large amount of organic solvent and surfactant are consumed.

Method used

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  • Method for preparing nano bismuth oxide
  • Method for preparing nano bismuth oxide
  • Method for preparing nano bismuth oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 The method for preparing bismuth oxide

[0025] Accurately weigh 3.65g of bismuth nitrate pentahydrate, measure 50ml of propylene glycol, mix the two in a beaker, and ultrasonically disperse for 30min until the bismuth nitrate is completely dissolved. Then above-mentioned mixed solution is transferred in the 250ml round-bottomed flask, is placed in the microwave oven that is connected with reflux device and reacts, microwave power is 360W, microwave radiation 6 minutes (each 2 minutes, interval 1 minute, totally 3 times). After the reaction, the product was collected, centrifuged, and washed three times with deionized water and absolute ethanol. Dry at 80°C for 6h. Calcined at 600°C for 2h to obtain bismuth oxide product.

[0026] The preparation process of this method is shown in figure 1 .

[0027] The XRD spectrum pattern of the resulting product is shown in figure 2 . It can be seen from b that most of the microwave products are amorphous and no...

Embodiment 2

[0029] Accurately weigh 1.66g of bismuth acetate, measure 50ml of ethylene glycol, mix the two in a beaker, and ultrasonically disperse for 20min until the bismuth acetate is completely dissolved. Then above-mentioned mixed solution is transferred in the 250ml round-bottomed flask, is placed in the microwave oven that is connected with reflux device and reacts, and microwave power is 180W, microwave radiation 20 minutes (every 4 minutes, intermediate interval 2 minutes, totally 5 times). After the reaction, the product was collected, centrifuged, and washed three times with deionized water and absolute ethanol. Dry at 60°C for 12h. Calcined at 550°C for 2h to obtain bismuth oxide product.

[0030] The XRD spectrum of the resulting product and figure 2 Basically the same.

Embodiment 3

[0032] Accurately weigh 1.66g of bismuth acetate, measure 50ml of propylene glycol, mix the two in a beaker, and ultrasonically disperse for 20min until the bismuth acetate is completely dissolved. Then above-mentioned mixed solution is transferred in the 250ml round-bottomed flask, is placed in the microwave oven that is connected with reflux device and reacts, microwave power is 540W, microwave radiation 16 minutes (every 4 minutes, interval 2 minutes, totally 4 times). After the reaction, the product was collected, centrifuged, and washed three times with deionized water and absolute ethanol. Dry at 60°C for 12h. Calcined at 650°C for 2h to obtain bismuth oxide product.

[0033] The XRD spectrum of the resulting product and figure 2 Basically the same.

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Abstract

The invention provides a preparation method of bismuth oxide. Both bismuth salt compound and alcohol are available and taken as reaction materials. The bismuth oxide product is prepared through microwave radiation. The preparation method provided by the invention has the advantages of environmental friendliness, simple technology, low production cost, narrow distribution of the particle size of the product, strong oxidation, high catalysis activity, non-toxicity and good chemical stability; the invention can be used in the treatment of wastewater, sewage and exhaust gas and the field of energy material; the invention can also be used to reduce the emission of industrial pollutants and can be popularized and applied in the treatment of exhaust gas for waste incineration industry, such as the iron and steel enterprises in China.

Description

technical field [0001] The invention relates to the field of oxide powder preparation, in particular to a preparation process of bismuth oxide. Background technique [0002] Bismuth oxide (Bi 2 o 3 ) as a semiconductor catalyst has been widely used in the field of catalysis, but relatively little research has been done in the field of photocatalysis. Semiconductor Bi 2 o 3 The band gap energy is 2.8eV (while the traditional photocatalyst TiO 2 The bandgap energy is 3.2eV), and its forbidden band width is the same as that of TiO 2 close, and because of its good stability, it has a good prospect for the development of photocatalysis. Nano Bi 2 o 3 Due to its large specific surface area and many surface active points, it will show more excellent photocatalytic activity. It is reported that bismuth oxide is used to photocatalyze nitrite-containing wastewater and experimental research on the degradation of organic dyes. The results show that Bi 2 o 3 Has good photocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00
Inventor 李咸伟杨华明俞勇梅苏晓晖石洪志何晓蕾
Owner BAOSHAN IRON & STEEL CO LTD
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