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Preparation method of rod-shaped AgBr nanometer material

A nanomaterial and rod-shaped technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of less preparation, and achieve the effect of simple operation, high output and low price

Inactive Publication Date: 2013-06-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of regular silver halide / Ag nanostructures is still relatively small, and the preparation of its regular morphology and the study of the influence of its morphology on its properties should attract attention.

Method used

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  • Preparation method of rod-shaped AgBr nanometer material
  • Preparation method of rod-shaped AgBr nanometer material
  • Preparation method of rod-shaped AgBr nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Adopt the method provided by the invention to prepare rod-shaped AgBr nanometer material, concrete steps are as follows:

[0018] In the first step, 54mg of PVP (MW 5800) and 45mg of sodium bromide were dissolved in a mixed solvent of dimethyl sulfoxide / deionized water (30mL, 10 / 20, V / V) at room temperature to obtain a colorless and transparent solution ,

[0019] In the second step, the colorless transparent solution was stirred at 60° C. for 30 minutes, and then 10 mL of silver acetate aqueous solution of 5 mg / mL was slowly added dropwise thereto, and the solution gradually became light yellow, and kept stirring at 60° C. for 30 minutes.

[0020] In the third step, the light yellow solution obtained was put into a 45mL polytetrafluoroethylene-lined stainless steel reactor, and subjected to hydrothermal reaction at 130° C. in an oven for 12 hours, and the system was naturally cooled to obtain a yellow precipitate.

[0021] The fourth step is to use a centrifuge to sep...

Embodiment 2

[0024] In the first step, 54mg of PVP (MW5800) and 45mg of sodium bromide were dissolved in a mixed solvent of dimethyl sulfoxide / deionized water (30mL, 10 / 20, V / V) at room temperature to obtain a colorless and transparent solution.

[0025] In the second step, the colorless transparent solution was stirred at 60° C. for 30 minutes, and then 10 mL of silver acetate aqueous solution of 5 mg / mL was slowly added dropwise thereto, and the solution gradually became light yellow, and kept stirring at 60° C. for 30 minutes.

[0026] In the third step, the light yellow solution obtained was put into a 45mL polytetrafluoroethylene-lined stainless steel reactor, and subjected to a hydrothermal reaction at 130° C. in an oven for 2 hours, and the system was naturally cooled to obtain a yellow product.

[0027] The fourth step is to use a centrifuge to separate the yellow product from the solution, wash the yellow product with deionized water first, and then wash it with absolute ethanol. ...

Embodiment 3

[0029] Adopt the method provided by the invention to prepare rod-shaped AgBr nanometer material, concrete steps are as follows:

[0030] In the first step, 50 mg of PVP (MW 5800) and 45 mg of sodium bromide were dissolved in a mixed solvent of dimethyl sulfoxide / deionized water (30 mL, 10 / 20, V / V) at room temperature to obtain a colorless and transparent solution ,

[0031] In the second step, the colorless transparent solution was stirred at 60° C. for 30 minutes, then slowly added dropwise to 8 mL of silver acetate aqueous solution of 5 mg / mL, the solution gradually became light yellow, and kept stirring at 60° C. for 30 minutes.

[0032] In the third step, the light yellow solution obtained was put into a 45mL polytetrafluoroethylene-lined stainless steel reactor, and subjected to hydrothermal reaction at 130° C. in an oven for 10 hours, and the system was naturally cooled to obtain a yellow precipitate.

[0033] The fourth step is to use a centrifuge to separate the solid...

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Abstract

The invention discloses a preparation method of a rod-shaped AgBr nanometer material, and belongs to the technical field of preparation of inorganic compound new-energy materials. According to the preparation method, the rod-shaped AgBr nanometer material is prepared by adopting a hydrothermal method and taking sodium bromide, silver acetate, dimethyl sulfoxide and polyvinyl pyrrolidone as raw materials. The preparation method particularly comprises the following steps of: dissolving the polyvinyl pyrrolidone and the sodium bromide into a dimethyl sulfoxide / deionized water mixed solvent at room temperature, and then slowly dropping a silver acetate water solution to generate a precursor; carrying out hydrothermal reaction in a reaction kettle at 130 DEG C for 2-14 hours; and after the hydrothermal reaction is finished, centrifugalizing, washing by using deionized water and anhydrous ethanol for multiple times, and drying to obtain the rod-shaped AgBr nanometer material. The preparation method disclosed by the invention has the advantages of easiness for operation, low raw material price, high yield, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic compound new energy materials, and relates to a method for preparing a photocatalytic rod-shaped AgBr nanomaterial. Background technique [0002] AgBr is almost insoluble in water, light yellow, and a narrow-band semiconductor with a bandgap width of 2.45eV. People think that AgBr is a light-unstable substance. However, in 1998, Kakuta found that AgBr was partially converted to Ag. Its composition AgBr / Ag will be more stable. It is a pity that this achievement did not attract people's attention at that time. With the in-depth research on plasmonic photocatalysts in the last two years, especially in 2008 by Awazu (see reference [1]: K.Awazu, M.Fujimaki, C.Rockstulil, J.Tominaga, H.Murakami, Y. Ohki, N.Yoshida, T.Watanabe, J.Am.Chem.Soc., 2008, 130, 1676-1680.;) using Ag / SiO 2 / TiO 2 As a surface plasmon photocatalyst, the film not only achieved good photocatalytic performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/02B82Y30/00
Inventor 郭林李博王华
Owner BEIHANG UNIV
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