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Bismuth tungstate nano-sheet and preparation method thereof

A technology of nanosheets and bismuth tungstate, applied in nanotechnology, chemical instruments and methods, tungsten compounds, etc., can solve problems such as inseparability

Inactive Publication Date: 2013-03-27
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Li Guisheng et al. synthesized microspheres stacked by bismuth tungstate nanosheets along any direction (Guisheng Li, Dieqing Zhang, et al, Environ.Sci.Technol.2010, 44, 4276-4281), however, the composition of the microspheres The nanosheets are completely grown together and cannot be separated, and the center of the sphere is a solid structure
However, bismuth tungstate nanosheets stacked along the same specific direction have not been reported

Method used

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  • Bismuth tungstate nano-sheet and preparation method thereof
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  • Bismuth tungstate nano-sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 1.8 grams of bismuth oxychloride to 3.5 milliliters of concentrated nitric acid, add 12 milliliters of deionized water after preliminary stirring, stir to dissolve and dilute, and record it as solution A. In addition, 1.2 g of sodium tungstate monohydrate was added to 60 ml of 15% ammonia water, stirred and dissolved, and recorded as solution B.

[0025] Solution A was added dropwise to solution B, and stirred while dropping to form a uniform suspension, and then the suspension was put into a polytetrafluoroethylene-lined stainless steel autoclave, and reacted at a temperature of 423K for 30 hours. After the reaction, the precipitated product was washed with deionized water, and then vacuum-dried at 323K to obtain bismuth tungstate nanosheets.

[0026] The prepared bismuth tungstate (Bi 2 WO 6 ) crystal form is consistent with the standard powder diffraction card (JCPDS: 73-1126), the shape is approximately square nanosheets, the thickness of a single sheet is abo...

Embodiment 2

[0028] Add 2.0 g of bismuth nitrate pentahydrate to 4 ml of concentrated nitric acid, add 20 ml of deionized water after preliminary stirring, stir to dissolve and dilute, and record it as solution A. In addition, 0.9 g of sodium tungstate monohydrate was added to 50 ml of 25% ammonia water, stirred and dissolved, and recorded as solution B.

[0029] Solution A was added dropwise to solution B and stirred while adding to form a uniform suspension, and then the suspension was put into a stainless steel autoclave lined with polytetrafluoroethylene, and reacted at a temperature of 393K for 24 hours. After the reaction, the precipitated product was washed with deionized water, and then dried under normal pressure at 343K to obtain bismuth tungstate nanosheets.

[0030] The prepared bismuth tungstate (Bi 2 WO 6 ) crystal form is consistent with the standard powder diffraction card (JCPDS: 73-1126), the shape is approximately square nanosheets, the thickness of a single sheet is a...

Embodiment 3

[0032] Add 1.9 grams of bismuth trichloride to 3 milliliters of concentrated nitric acid, add 15 milliliters of deionized water after initial stirring, stir to dissolve and dilute, and record it as solution A. In addition, 1.0 g of sodium tungstate monohydrate was added to 55 ml of 18% ammonia water, stirred and dissolved, and recorded as solution B.

[0033] Solution A was added dropwise to solution B, and stirred while dropping to form a uniform suspension, and then the suspension was put into a polytetrafluoroethylene-lined stainless steel autoclave, and reacted at a temperature of 403K for 36 hours. After the reaction, the precipitated product was washed with deionized water, and then dried under normal pressure at 353K to obtain bismuth tungstate nanosheets.

[0034] The prepared bismuth tungstate (Bi 2 WO 6 ) crystal form is consistent with the standard powder diffraction card (JCPDS: 73-1126), the shape is approximately square nanosheets, the thickness of a single she...

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Abstract

The invention relates to bismuth tungstate nano-sheets and a preparation method thereof. The bismuth tungstate nano-sheets are approximately square-shaped. A single sheet layer has a thickness of 10-100nm, a length of 1-20mum, and a width of 1-20mum; a plurality of bismuth tungstate nano-sheets are stacked along a same specific direction, such that a multilayer square ordered stack is formed. A specific preparation method comprises the steps that: bismuth salt which is soluble in acid is added into concentrated nitric acid; primary stirring is carried out, and deionized water is added for dissolving and diluting; tungstate is added into ammonia water, and is dissolved by stirring; the two solutions are mixed, and a hydrothermal treatment is further carried out, such that the bismuth tungstate nano-sheets are obtained. The preparation method has the advantages of simple process, wide parameter adjustable range, high repeatability, and low cost. The method has good commercial prospect. The prepared bismuth tungstate nano-sheets have high application values in fields such as pollution treatment, environment protection, novel energy preparation, and the like.

Description

technical field [0001] The invention relates to a nanosheet and a preparation method thereof, in particular to a bismuth tungstate nanosheet and a preparation method thereof, belonging to the technical field of inorganic nanomaterials and synthesis. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious, and the problem of energy shortage is also imminent. In the face of the above two crises, people have launched scientific research on pollution control and environmental protection. Taking semiconductors as catalysts and using sunlight to catalyze oxidation and degradation of pollutants as an effective method of pollution control has become a hot spot in environmental protection scientific research. Under the above research background, researchers from various countries have developed a variety of semiconductor nanomaterials, such as titanium dioxide, zinc oxide, tungsten trioxide, etc., for the treatment of pol...

Claims

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Application Information

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IPC IPC(8): C01G41/00B82Y40/00
Inventor 赵斌金彩虹何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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