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Bismuth nanosheets, and preparation method and application thereof

A technology of bismuth nano and bismuth nitrate pentahydrate, which is applied in the field of nanomaterials and can solve the problems of long preparation time, complicated formula and dependence on special equipment

Active Publication Date: 2018-09-04
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the preparation methods of nano-bismuth mainly include thermal plasma method (Surf.Coat.Tech., 2007, 201, 5330-5332), vapor deposition method (Electrochem. Commun., 2007, 9, 2514-2518), electrodeposition method (J.Am.Chem.Soc., 2013,135,18520-18527), liquid phase reduction method (CN 201310385811.3), etc. However, these methods have complex raw material formulas, long preparation time or rely on special equipment, so , it is of great significance to explore a simple process, low cost, and environmentally friendly preparation method of bismuth nanopowder

Method used

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  • Bismuth nanosheets, and preparation method and application thereof
  • Bismuth nanosheets, and preparation method and application thereof
  • Bismuth nanosheets, and preparation method and application thereof

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preparation example Construction

[0026] The invention provides a method for preparing bismuth nanosheets, comprising the following steps:

[0027] Mix bismuth nitrate pentahydrate, ascorbic acid and ethylene glycol to obtain mixed solution A;

[0028] Complexing agent, chloride salt and water are mixed, obtain mixed solution B, and described complexing agent is selected from sodium citrate or sodium tartrate;

[0029] Mix the mixed solution A and the mixed solution B, adjust the pH value, and react under ultrasonic conditions to obtain bismuth nanosheets.

[0030] The method uses common bismuth nitrate pentahydrate as the bismuth source, ascorbic acid with milder reducing properties as the reducing agent, sodium citrate as the complexing agent, potassium chloride as the additive, and ethylene glycol and deionized water as the mixed solvent to adjust the pH. After the value, the bismuth nanosheets were reacted under the assistance of ultrasound. The method can obtain bismuth nanosheets, and the prepared bism...

Embodiment 1

[0046]2mmol of bismuth nitrate pentahydrate and 12mmol of ascorbic acid were stirred and dissolved in 20ml of ethylene glycol to obtain solution A, 6mmol of sodium citrate and 6mmol of potassium chloride were stirred and dissolved in deionized water to obtain solution B, and solution A and solution B were stirred and mixed to obtain For solution C, use 25% to 28% ammonia water to adjust the pH to 12.5, put solution C into an ultrasonic reactor with a temperature of 40°C and a power of 100W, and react for 90 minutes to obtain a precipitate. Centrifuge the precipitate and wash it with deionized water and Washing with absolute ethanol, putting the washed product in a vacuum oven at 40° C. for 10 h to obtain bismuth nanosheet powder.

[0047] figure 1 For the XRD analysis figure of the bismuth nanosheets prepared in this example, it can be seen that the bismuth nanosheets prepared in Example 1 of the present invention are consistent with the standard card JCPDS 85-1329, and no imp...

Embodiment 2

[0051] Stir and dissolve 2mmol bismuth nitrate pentahydrate and 6mmol ascorbic acid in 20ml of ethylene glycol to obtain solution A, stir and dissolve 2mmol sodium tartrate and 2mmol potassium chloride in deionized water to obtain solution B, stir and mix solution A and solution B to obtain solution C, adjust the pH value to 13.5 with ammonia water with a mass fraction of 25-28%, put the solution C into an ultrasonic reactor with a temperature of 60°C and a power of 150W, and react for 60 minutes to obtain a precipitate, centrifuge the precipitate and wash it with deionized water and After washing with absolute ethanol, the washed product was dried in a vacuum oven at 60° C. for 7 hours to obtain bismuth nanosheet powder.

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Abstract

The invention provides bismuth nanosheets, and a preparation method and application thereof. The preparation method comprises the following steps that bismuth nitrate pentahydrate, ascorbic acid and ethylene glycol are mixed, and thus a mixed solution A is obtained; sodium citrate, potassium chloride and water are mixed, and thus a mixed solution B is obtained; and the solution A and the solutionB are mixed, after the pH value is adjusted, reacting is conducted under the ultrasonic condition, and the bismuth nanosheets are obtained. According to the preparation method, the bismuth nanosheetscan be obtained, and size distribution of the prepared bismuth nanosheets are uniform. The preparation method is simple, the cost of adopted raw materials is low, the raw materials are nonhazardous tothe environment, batch and mass production is easy, and the prepared bismuth nanosheets are few in impurity and high in purity; bismuth powder is in a sheet shape, the size is uniform, and obvious agglomerated large particles do not occur; and the average width of the bismuth nanosheets is 0.5-1 [mu]m, and the average thickness of the bismuth nanosheets is 80-100 nm; and a bismuth / BiOCl compositecatalytic material degrades 90% of methyl orange, and the rate constant of a photo-catalytic reaction is 0.0283 min<-1>.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a bismuth nanosheet, a preparation method and an application thereof. Background technique [0002] Bismuth is a non-toxic, environmentally friendly and important semi-metallic material, which has been widely used in metallurgy, chemical industry, electronics, aerospace, medical treatment and other fields. In particular, nanobismuth has unique physical and chemical properties, and it can be used in X-ray radiotherapy. Sensitive materials, catalytic materials, thermoelectric materials and other aspects have shown good application prospects. [0003] At present, the preparation methods of nano-bismuth mainly include thermal plasma method (Surf.Coat.Tech., 2007, 201, 5330-5332), vapor deposition method (Electrochem. Commun., 2007, 9, 2514-2518), electrodeposition method (J.Am.Chem.Soc., 2013,135,18520-18527), liquid phase reduction method (CN 201310385811.3), etc....

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00C01G29/00B82Y40/00
CPCB82Y40/00C01G29/00B22F9/24B22F1/0551B22F1/054
Inventor 崔占奎谌炫安耿宏起法文君葛素香
Owner XUCHANG UNIV
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