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Material based on bismuth oxycarbonate or bismuth oxide nano tube and preparation method thereof

A technology of bismuth oxycarbonate and nanotubes, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., to achieve uniform distribution of tube diameters, large specific surface area, and high crystallinity

Inactive Publication Date: 2016-01-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bismuth oxide prepared by these methods mostly has a granular structure

Method used

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  • Material based on bismuth oxycarbonate or bismuth oxide nano tube and preparation method thereof
  • Material based on bismuth oxycarbonate or bismuth oxide nano tube and preparation method thereof
  • Material based on bismuth oxycarbonate or bismuth oxide nano tube and preparation method thereof

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preparation example Construction

[0034] A preferred embodiment of the present invention provides a kind of preparation method based on the material of bismuth oxycarbonate or bismuth oxide nanotube, comprises the following steps:

[0035] In the first step, dissolving bismuth nitrate in dilute nitric acid or dissolving bismuth nitrate in dilute nitric acid solution dispersed with graphene oxide is stirred uniformly to obtain a first reaction solution; wherein the concentration of bismuth nitrate is 0.5-5mg / ml ;The concentration of dilute nitric acid is 0.02~0.05mol / L; the mass ratio of bismuth nitrate to graphene oxide is 50:3~200:1;

[0036] In the second step, ammonia water is added dropwise to the first reaction solution until the pH of the system formed by mixing the first reaction solution and ammonia water is adjusted to alkaline, that is, the pH value is 9 to 11, and the second mixed solution is obtained;

[0037] In the third step, the second mixed solution is contained in CO 2 Atmospheric or without...

Embodiment 1

[0041] Weigh 400mg bismuth nitrate pentahydrate [Bi(NO 3 ) 3 ·5H 2 O] and it is added in the beaker that fills 200mL, 0.02mol / L dilute nitric acid solution, stirs until fully dissolving, obtains the first reaction solution. Ammonia water was added dropwise into the first reaction solution to adjust the pH value of the reaction system to 10, and a second mixed solution containing white flocculents was obtained at this time. Place the beaker containing the second mixed solution in a constant temperature oil bath at 60°C for 12 hours and heat and stir for 12 hours, then turn off the heating and stirring to obtain a white precipitate, which is separated by centrifugation, and deionized water is used to demineralize the white precipitate. Wash and dry in an oven at 60°C to obtain the product.

[0042] X-ray diffraction identification final product is bismuth oxycarbonate (see attached Figure 9 , the number of the corresponding standard diffraction peak is PDF:41-1488), scannin...

Embodiment 2

[0044] Weigh 800 mg of bismuth nitrate pentahydrate and add it into a round-bottomed flask containing 200 mL of 0.05 mol / L dilute nitric acid solution, and stir until fully dissolved to obtain the first reaction solution. The round bottom flask was sealed with a rubber stopper and the flask was evacuated with nitrogen sparging with stirring. Ammonia water was added dropwise into the first reaction solution to adjust the pH value of the reaction system to 11 to obtain a second mixed solution containing white flocculents. Place the flask containing the second mixed solution in a constant temperature oil bath at 60°C and heat and stir for 15 hours, then turn off the heating and stirring to obtain a white precipitate, which is separated by centrifugation, and deionized water is used to treat the white precipitate. Wash and dry in a vacuum oven at 60°C to obtain the product.

[0045] The final product was identified as bismuth oxide by X-ray diffraction (see attached Figure 10 ,...

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Abstract

The invention discloses a preparation method of a material based on a bismuth oxycarbonate or bismuth oxide nano tube. The preparation method of the material based on the bismuth oxycarbonate or bismuth oxide nano tube comprises the following steps: firstly dissolving bismuth nitrate in dilute nitric acid or dissolving bismuth nitrate into dilute nitric acid solution dispersed with oxidized graphene, and uniformly stirring, so as to obtain first reaction solution; secondly, dropwise adding ammonia water in the first reaction solution until pH value of a system generated by mixing the first reaction solution and the ammonia water to be alkaline, so as to obtain second mixed liquor; and thirdly, stirring the second mixed liquor in CO2-containing atmosphere or CO2-free atmosphere, so as to obtain the material based on the bismuth oxycarbonate or bismuth oxide nano tube. The obtained material is a bismuth oxycarbonate nano tube, a bismuth oxide nano tube, a graphene-based bismuth oxycarbonate nano tube or a graphene-based bismuth oxide nano tube and can be applied to the fields of photocatalysis degradation, sterilization, adsorption, gas sensing, energy storage and pharmacy.

Description

technical field [0001] The invention relates to a material based on bismuth oxycarbonate or bismuth oxide nanotubes and a preparation method thereof, in particular to bismuth oxycarbonate nanotubes, bismuth oxide nanotubes, graphene-based bismuth oxycarbonate nanotubes or graphene-based bismuth oxide nanotubes and its preparation method. Background technique [0002] Bismuth is the most important stable metal element in the periodic table of elements. It is located at the junction of metals and non-metals. It has special physical and chemical properties, is non-toxic and non-carcinogenic, and is called a green metal. Bismuth oxycarbonate, also known as basic bismuth oxycarbonate and bismuth subcarbonate, is a white powder with the chemical formula Bi 2 o 2 CO 3 . Bismuth oxycarbonate is not only used as astringent in pharmaceutical industry, sunscreen for X-ray diagnosis, treatment of gastritis duodenal ulcer / acute mucosal penetrating gastritis / bacterial dysentery / diarrh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y30/00
Inventor 冯新亮吴东清汤艳萍杨重庆麦亦勇张帆黄涛井凡
Owner SHANGHAI JIAO TONG UNIV
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