Preparation method of selenium nanowires

A technology of selenium nanometer and selenium elemental substance, applied in the field of nanowires, can solve problems such as large-scale synthesis difficulties and complicated methods, and achieve the effects of mild reaction conditions, fine precipitated particles, and simple experimental devices and methods.

Inactive Publication Date: 2017-08-29
HEBEI NORMAL UNIV FOR NATTIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these synthetic methods control the growth of Se one-dimensional nanostructures well, most of the methods are still relatively complicated, requiring the assistance of templates, external seeds, and harsh reaction conditions, which brings difficulties to large-scale synthesis.

Method used

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  • Preparation method of selenium nanowires
  • Preparation method of selenium nanowires
  • Preparation method of selenium nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dissolve 1.0g sodium selenite, 1.5ml concentrated hydrochloric acid and 3.0ml polyethylene glycol (average molecular weight 400) in deionized water to form 100ml aqueous solution;

[0036] (2) A diaphragmless electrolytic cell is formed with a nickel sheet as the cathode and a graphite sheet as the anode, see figure 1 , figure 1 Schematic diagram of the structure of the electrolytic cell without diaphragm provided by the embodiment of the present invention;

[0037] (3) At room temperature, at 3mA / cm 2 Constant current electrolysis of the above aqueous solution for 3.5 hours at a current density of 10000 to obtain a brownish-red precipitate;

[0038] (4) The precipitate was washed successively with distilled water and absolute ethanol, and then placed in absolute ethanol for 24 hours to obtain selenium nanowires.

[0039] see figure 2 , figure 2 The scanning photo of the selenium nanowires prepared by the method provided by the present invention shows that th...

Embodiment 2

[0041] (1) Dissolve 1.0g sodium selenite, 1.5ml concentrated hydrochloric acid and 3.0ml polyethylene glycol (average molecular weight 400) in deionized water to form 100ml aqueous solution;

[0042] (2) The nickel sheet is used as the cathode, the graphite plate is used as the anode, and the cathode and anode are separated by a nafion membrane to form a diaphragm electrolytic cell, see image 3 , image 3 Schematic diagram of the membrane electrolytic cell structure provided for the embodiment of the present invention;

[0043] (3) At room temperature, at 3mA / cm 2 Constant current electrolysis of the above aqueous solution for 3.5 hours at a current density of 10000 to obtain a brownish-red precipitate;

[0044] (4) The precipitate was washed successively with distilled water and absolute ethanol, and then placed in absolute ethanol for 24 hours to obtain selenium nanowires.

[0045] The results show that the method provided by the invention has prepared selenium nanowires...

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Abstract

The invention provides a preparation method of selenium nanowires, which includes the steps of: a) performing electrolysis with sodium selenite, polyethylene glycol and a hydrochloric acid water solution as an electrolyte to produce elementary selenium; b) washing the elementary selenium and allowing the elementary selenium to stand in anhydrous ethanol for aging the elementary selenium to produce the selenium nanowires. In the invention, with the sodium selenite, polyethylene glycol and hydrochloric acid water solution as the electrolyte for performing electrolysis, the sodium selenite is reduced on a negative pole into the elementary selenium, wherein the hydrochloric acid provides an acidic environment that is beneficial to the reduction reaction. The polyethylene glycol has dispersion effect, so that precipitate particles are fine, which is beneficial to follow-up crystal form transformation, thereby shortening the time of producing the selenium nanowires; after the elementary selenium is prepared, the elementary selenium is aged in the anhydrous ethanol, so that the elementary selenium is converted into the nanowires. A test result proves that the method can produce the selenium nanowires.

Description

technical field [0001] The invention belongs to the technical field of nanowires, in particular to a preparation method of selenium nanowires. Background technique [0002] Se is an important elemental semiconductor with many excellent optoelectronic properties. In recent years, with the in-depth research on the nanostructure of simple substances, the quantum confinement effect and unique anisotropy of selenium have gradually attracted people's attention, and it has become the building block of a new generation of nano-optoelectronic devices. It has good application prospects in electricity, optoelectronic devices, nonlinear optical materials and photocatalytic materials. [0003] So far, many liquid-phase chemical synthesis methods of selenium nanowires have been proposed in the prior art, such as heating reflux method, solvent (hydro) thermal method, sonochemical method, microwave-assisted synthesis method, photothermal-assisted synthesis method, biomolecular template met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00B82Y40/00
CPCB82Y40/00C25B1/00
Inventor 高峻峰
Owner HEBEI NORMAL UNIV FOR NATTIES
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