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A kind of silver vanadate nano belt and preparation method thereof

A technology of nanobelt and silver vanadate, which is applied in the direction of nanotechnology, chemical instruments and methods, vanadium compounds, etc., can solve the problems of restrictive conditions, many steps, and high cost, and achieve simple operation, low cost, and mild and reliable hydrothermal conditions. control effect

Active Publication Date: 2019-04-12
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have more restrictions and steps, so the cost is higher

Method used

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  • A kind of silver vanadate nano belt and preparation method thereof
  • A kind of silver vanadate nano belt and preparation method thereof
  • A kind of silver vanadate nano belt and preparation method thereof

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preparation example Construction

[0047] This embodiment proposes a method for preparing silver vanadate nanobelts, comprising the following steps:

[0048] 1. Add the vanadium-containing compound into the dispersant, and fully disperse the vanadium-containing compound by stirring or vibrating to form a suspension A.

[0049] In this embodiment, vanadium pentoxide is selected as the vanadium-containing compound, ultrapure water is selected as the dispersant, and silver nitrate is selected as the silver-containing compound. The ratio of vanadium pentoxide to ultrapure water is 0.3-3mmol:15ml.

[0050] 2. According to the molar ratio of silver in the silver-containing compound to vanadium in the vanadium-containing compound is 0.5-1:1, add a certain amount of silver-containing compound to the suspension A, transfer it to the dark box, and use it under vigorous stirring. The silver-containing compound is fully dissolved to form a suspension B, which is stored in a dark place.

[0051] 3. Put the suspension B at...

Embodiment 1

[0067] Such as figure 1 Shown, embodiment 1 proposes a kind of preparation method of silver vanadate nanobelt, comprises the following steps:

[0068] 1. Add 0.3mmol of vanadium pentoxide to 15ml of ultrapure water, and use electromagnetic stirring to fully disperse the vanadium pentoxide to form a suspension A.

[0069] 2. According to the molar ratio of silver in silver nitrate and vanadium of vanadium pentoxide is 1:1, add a certain amount of silver nitrate into the suspension A, transfer it to the dark box, and make the silver nitrate fully Dissolve to form Suspension B, and store in shading.

[0070] 3. Move the suspension B to a high-pressure reactor, seal it, and heat it at 120°C for 48 hours. After high-temperature hydrothermal treatment, a dark green Ag 2 V 4 o 11 Precipitated product mixture.

[0071] 4. Centrifuge the product mixture in step 3 for 10 minutes at a speed of 3800 rpm in a centrifuge, remove the supernatant, collect the precipitate, and then repeat...

Embodiment 2

[0074] Embodiment 2 proposes a kind of preparation method of silver vanadate nanobelt, comprises the following steps:

[0075] 1. Add 1mmol of vanadium pentoxide to 15ml of ultrapure water, and use a vibrating sieve to fully disperse the vanadium pentoxide to form a suspension A.

[0076]2. According to the molar ratio of silver in silver nitrate and vanadium pentoxide of 0.8:1, add a certain amount of silver nitrate into the suspension A, transfer it to the dark box, and make the silver nitrate fully Dissolve to form Suspension B, and store in shading.

[0077] 3. Move the suspension B to a high-pressure reactor, seal it, and heat it at 150°C for 48 hours. After high-temperature hydrothermal treatment, a dark green Ag 2 V 4 o 11 Precipitated product mixture.

[0078] 4. Centrifuge the product mixture in step 3 for 10 minutes at a speed of 3800 rpm in a centrifuge, remove the supernatant, collect the precipitate, and then repeatedly wash the precipitate with deionized wate...

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Abstract

The invention discloses an Ag2V2O11 (silver vanadate) nanoribbon and a preparation method thereof. The preparation method comprises the following steps of adding a vanadium-containing compound into adispersant, and fully dispersing, so as to form a suspension liquid A; adding a silver-containing compound into the suspension liquid A, and fully dissolving under the dark environment, so as to forma suspension liquid B; performing hydrothermal treatment on the suspension liquid B at the temperature being higher than 100 DEG C and lower than 200 DEG C, so as to obtain a product mixture containing dark green Ag2VO11 precipitate; centrifuging and separating the product mixture, collecting the precipitate, cleaning the precipitate, centrifuging and separating, and drying, so as to obtain a conventional Ag2V2O11 nanoribbon powder; adding the conventional Ag2V2O11 nanoribbon powder into the dispersant, performing hydrothermal treatment at the normal pressure and the temperature lower than orequal to 100 DEG C, cleaning, centrifuging and separating, and drying, so as to obtain the Ag2V2O11 nanoribbon with large ratio of exposed {111} crystal surfaces. The preparation method has the advantages that the operation is simple and convenient, the reaction conditions are mild and controllable, the cost is low, and the preparation method is suitable for large-scale production; the obtained product can expose the {111} crystal surfaces at large ratio, the adsorbing ability on target gas is high, and the selectivity on the target gas is improved.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a method for preparing a silver vanadate nanobelt and a silver vanadate nanobelt prepared by using the method. Background technique [0002] Silver vanadate is a class of functional materials widely used in optics, electricity and catalysis. According to the different proportions of silver, vanadium and oxygen, silver vanadate has a variety of different compositions and structures (including AgVO 3 , Ag 0.35 V 2 o 5 , Ag 0.33 V 2 o 5 , Ag 3 VO 4 , Ag 2 V 4 o 11 Wait). Among many silver vanadates, Ag 2 V 4 o 11 It has a variety of functional applications, especially in electrical aspects, and it has been successfully used in pacemaker batteries. In recent years, with the in-depth study of its semiconductor properties, scientists have found that it has excellent performance in gas sensors. For example, it shows higher sensitivity and selectivity to n-butylamine. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/00B82Y40/00
CPCB82Y40/00C01G31/00C01P2002/72C01P2004/03C01P2004/04C01P2004/17
Inventor 付海涛吴镇湘杨晓红安希忠张浩李武发弓梦丽王文文
Owner NORTHEASTERN UNIV LIAONING
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