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A kind of radial selenium nanotube and its preparation method

A selenium nano, radial technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of single selenium nanotube method, complex synthesis process, unfriendly environment, etc. Friendly, cheap and easy to obtain raw materials, simple process effect

Active Publication Date: 2021-12-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method for synthesizing selenium nanotubes is single, the synthesis process is complicated, the environment is not friendly, and the yield is low, and the crystal growth needs to be controlled by high temperature hydrothermal reaction

Method used

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  • A kind of radial selenium nanotube and its preparation method
  • A kind of radial selenium nanotube and its preparation method
  • A kind of radial selenium nanotube and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A radial selenium nanotube, its preparation method comprises the steps:

[0027] 1) Preparation of amorphous selenium precursor: Dissolve 2 g of polyvinylpyrrolidone (PVP) with a molecular weight of 55,000 in 100 ml of deionized water, and after the dispersion is uniform, add 2 g of selenous acid and stir magnetically for 30 minutes to obtain a colorless and transparent solution. Slowly add 5g of ascorbic acid, react for 3h, the transparent solution gradually turns brick red, and then centrifuge and wash to obtain amorphous selenium;

[0028] 2) Preparation of radial selenium nanotubes: Disperse 200 mg of amorphous selenium obtained in step 1) in 100 ml of absolute ethanol, let stand for 8 hours to obtain a gray solution, and sequentially wash with deionized water and absolute ethanol to obtain the final product.

[0029] Carry out powder X-ray diffraction analysis to step 1) gained precursor amorphous selenium, the results are shown in figure 1 , the diffraction peaks...

Embodiment 2

[0032] A kind of radial selenium nanotube, its preparation method comprises the steps:

[0033] 1) Preparation of amorphous selenium precursor: Dissolve 3 g of polyvinylpyrrolidone (PVP) with a molecular weight of 40,000 in 100 ml of deionized water, add 4 g of selenous acid after the dispersion is uniform, and stir magnetically for 30 minutes to obtain a colorless and transparent solution. Slowly add 3g of ascorbic acid, the transparent solution gradually turns into brick red, after reacting for 5 hours, the resulting brick red liquid is centrifuged and washed to obtain amorphous selenium;

[0034] 2) Preparation of radial selenium nanotubes: Disperse 500 mg of amorphous selenium obtained in step 1) in 100 ml of absolute ethanol, let stand for 12 hours to obtain a gray solution, and sequentially wash with deionized water and absolute ethanol to obtain the final product.

Embodiment 3

[0036] A kind of radial selenium nanotube, its preparation method comprises the steps:

[0037] 1) Preparation of amorphous selenium precursor: Dissolve 4 g of polyvinylpyrrolidone (PVP) with a molecular weight of 55,000 in 100 ml of deionized water, add 2 g of selenous acid after the dispersion is uniform, and stir magnetically for 30 minutes to obtain a colorless and transparent solution. Add 5g of ascorbic acid, the transparent solution gradually turns into brick red, after reacting for 3 hours, the resulting brick red liquid is centrifuged and washed to obtain amorphous selenium;

[0038] 2) Preparation of radial selenium nanotubes: Disperse 300 mg of amorphous selenium obtained in step 1) in 100 ml of absolute ethanol, let stand for 10 hours to obtain a gray solution, and sequentially wash with deionized water and absolute ethanol to obtain the final product.

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Abstract

The invention discloses a method for synthesizing radial selenium nanotubes at room temperature, which comprises the following steps: 1) dissolving PVP in water, adding a selenium source, adding ascorbic acid under magnetic stirring, and centrifuging to obtain amorphous selenium nanoparticles; 2) Dispersing the obtained amorphous selenium nanoparticles in absolute ethanol, centrifuging and washing to obtain radial selenium nanotubes. The present invention proposes a method for synthesizing radial selenium nanotubes at room temperature for the first time. The preparation method involved is simple, the reaction conditions are mild, the product yield is high, the raw materials are cheap and easy to obtain, safe and environmentally friendly, and the prepared selenium nanotubes are of uniform size. The photovoltaic industry has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano functional materials, and in particular relates to a radial selenium nanotube and a preparation method thereof. Background technique [0002] Selenium is a red monoclinic crystal, and there is a more stable selenium, which is a gray hexagonal rhomboid crystal with a metallic luster. Red selenium and gray selenium are allotropes of selenium. After red selenium is heated, it will quickly turn into gray selenium. The melting point of gray selenium is 217°C, the boiling point is 600°C, and the relative solubility is 4.26-4.28. The important characteristic of gray selenium is that it has typical semiconductor properties and can be used for radio detection and rectification. Selenium rectifiers have the characteristics of load resistance, high temperature resistance, and good electrical stability. Selenium is very sensitive to light, and it has been determined that in full sunlight, the conduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02B82Y30/00
CPCB82Y30/00C01B19/02C01P2002/72C01P2004/03C01P2004/13
Inventor 李昱董文达刘洋宋建平谈海歌陈丽华王洪恩苏宝连
Owner WUHAN UNIV OF TECH
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