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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 a silver vanadate nanoribbon and a preparation method thereof. The method includes: adding a vanadium-containing compound to a dispersant and fully dispersing it to form suspension A; adding a silver-containing compound to suspension A and fully dissolving it in a dark environment to form suspension B; placing suspension B at high temperature. Hydrothermal treatment at 100°C and lower than 200°C produces dark green Ag. 2 V 4 O 11 Precipitated product mixture; centrifuge the product mixture, collect the precipitate, wash the precipitate, centrifuge and dry to obtain conventional Ag 2 V 4 O 11 Nanoribbon powder; convert regular Ag 2 V 4 O 11 The nanoribbon powder is added to the dispersant, hydrothermally treated at normal pressure and at a temperature lower than or equal to 100°C, and then washed, centrifuged, and dried to obtain a large proportion of Ag with exposed {111} crystal planes. 2 V 4 O 11 nanoribbons. The method of the present invention is simple to operate, has mild and controllable reaction conditions, low cost, and is suitable for large-scale production; the obtained product can expose a large proportion of {111} crystal planes, has large adsorption energy for target gases, and improves the adsorption capacity for target gases. selectivity.

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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