A kind of bismuth oxycarbonate material of nano-micro scale plate and its preparation method

A bismuth oxycarbonate, nano-micron technology, applied in nanotechnology, chemical instruments and methods, bismuth compounds, etc., can solve the problems of poor dispersibility, high cost, expensive raw materials, etc., and achieve good dispersibility, low price, and purity. high effect

Inactive Publication Date: 2011-12-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Most of the existing bismuth oxycarbonate materials are cube-shaped, polyhedron-shaped, nano-strip-shaped or irregularly shaped, and are mainly prepared with bismuth citrate as the bismuth source and organic solvents as the solvent. The raw materials used are expensive, the cost is high, and the use of Organic solvents as solvents can easily cause the aggregation of bismuth oxycarbonate nanoparticles, resulting in poor dispersion

Method used

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  • A kind of bismuth oxycarbonate material of nano-micro scale plate and its preparation method
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  • A kind of bismuth oxycarbonate material of nano-micro scale plate and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Dissolve 10.022 g of urea in 40 ml of double-distilled water, add 2.028 g of bismuth nitrate pentahydrate, and stir until completely dissolved to obtain a mixed solution. Transfer the mixed solution to a 100ml stainless steel autoclave lined with polytetrafluoroethylene (the pressure of the autoclave is above 3MPa, the same as in the following examples), and place the reactor in a constant temperature drying oven at a temperature of 180 Incubate at ℃ for 4 hours. After the reaction is completed, the reaction kettle is naturally cooled to room temperature, and the product is suction filtered to obtain a yellowish precipitate, which is washed several times with distilled water and dried at room temperature. After air drying, the carbonic acid obtained is weighed The mass of bismuth oxide is 0.9965 g, and the recovery rate of bismuth is tested according to the method of the Ministry of Health standard WS3-B-1553-93 (the same in the following examples), and the recovery rate ...

Embodiment 2

[0028] Dissolve 4.080g of urea in 40ml of double-distilled water, then add 2.038g of bismuth nitrate pentahydrate, stir until completely dissolved, transfer the mixed solution to a 100ml stainless steel autoclave lined with polytetrafluoroethylene. The reaction kettle was placed in a constant temperature drying box and kept at a temperature of 180°C for 2 hours. After the reaction was completed, the reaction kettle was naturally cooled to room temperature, and the product was suction filtered to obtain a yellowish precipitate, which was washed with distilled water several times. Place it to dry at room temperature. After air drying, the mass of the obtained bismuth oxycarbonate is 0.9937 g, and the recovery rate of bismuth is 91.34%. image 3 The SEM image of bismuth oxycarbonate in this example shows that the product has good dispersibility.

Embodiment 3

[0030] Dissolve 4.143g of urea in 30ml of double distilled water, then add 2.069g of bismuth nitrate pentahydrate, stir until completely dissolved, transfer the mixed solution to a 100ml stainless steel autoclave lined with polytetrafluoroethylene. The reaction kettle was kept at a temperature of 140°C for 4 hours. After the reaction was completed, the reaction kettle was naturally cooled to room temperature, and the product was suction filtered to obtain a yellowish precipitate, which was washed several times with distilled water and dried at room temperature. After air drying, the weight of the obtained bismuth oxycarbonate was weighed to be 0.9875 g, and the recovery rate of bismuth was 92.08%.

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Abstract

The invention discloses a nano / micro-scale sheet bismuthyl carbonate material and a preparation method thereof. Micro-morphology of the nano / micro-scale sheet bismuthyl carbonate material is in the shape of a sheet-like particle. The particle size is in a range of 10 to 1000 nm. The preparation method comprises that urea is prepared into a urea aqueous solution; the urea aqueous solution and bismuth nitrate pentahydrate are mixed according to a certain proportion; the mixed solution is maintained at a temperature of 100 to 200 DEG C under the pressure above 3MPa for 1 to 4 hours to undergo a reaction; after the reaction, the reaction products are cooled in air to room temperature; and the cooled products are filtered by a pump, washed by water and dried at room temperature to form the nano / micro-scale sheet bismuthyl carbonate material. The nano / micro-scale sheet bismuthyl carbonate material has the advantages of good dispersibility, high purity, high bismuth recovery rate above 90%, no need of addition of any organic solvent in preparation, and no damage on human bodies and the environment.

Description

Technical field [0001] The invention relates to a bismuth oxycarbonate material, in particular to a nano-micron plate bismuth oxycarbonate material and a preparation method thereof. Background technique [0002] Bismuth is the most important stable metal element in the periodic table. It is located at the junction of metal and non-metal. It has special physical and chemical properties, non-toxic and non-carcinogenic, and is called a green metal. The content of bismuth in the earth's crust is very small (0.008×10 -6 ), the content of bismuth is equivalent to that of gold and platinum. Bismuthite (Bi 2 S 3 ), bismuth ore (Bi 2 O 3 ), bismuthite (nBi 2 O 3 ·MCO 2 ·H 2 O), copper bismuth ore (3Cu 2 S·4Bi 2 S 3 ), Galena (2PbS·Bi 2 S) etc. exist. Various compounds of bismuth have been widely used in medicine, cosmetics, industrial pigments, catalysts, flame retardants, electronic ceramics, refrigeration, nuclear reactions, metallurgical additives, fusible alloys and bismuth-based all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y40/00
Inventor 栗海峰周佳何明中
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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