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Solvothermal controllable method for preparing ZnSe and ZnTe nano materials

A nanomaterial and solvothermal technology, applied in nanotechnology, binary selenium/tellurium compounds, etc., can solve the problems that have not yet been seen, and achieve the effect of simple process

Inactive Publication Date: 2011-05-04
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Most of the existing research work is on the single aspect of the phase or morphology of ZnSe or ZnTe nanomaterials, and adopts more complicated experimental operation methods, such as using templates and stabilizers, changing the ratio of mixed solvents, using N 2 Protection or post-calcination treatment requires multi-party control, but there are few studies on the simple control of the phase and morphology of ZnSe and ZnTe in the same system
So far, there is no report on the simple one-step controlled synthesis of ZnSe and ZnTe nanomaterials with sphalerite or wurtzite structure in the same system

Method used

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  • Solvothermal controllable method for preparing ZnSe and ZnTe nano materials
  • Solvothermal controllable method for preparing ZnSe and ZnTe nano materials
  • Solvothermal controllable method for preparing ZnSe and ZnTe nano materials

Examples

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Embodiment 1

[0019] 1 mmol analytically pure sodium selenite (Na 2 SeO 3 ·5H 2 O) put into the polytetrafluoroethylene lining, add ethanolamine solvent to make the solution volume account for 80% of the total volume of the polytetrafluoroethylene lining. Magnetically stirred for several minutes, then added 2mmol of analytically pure zinc acetate (Zn(CH 3 COO) 2 2H 2 0), continue magnetic stirring until evenly sealed reaction kettle, placed in 200 ℃ oven reaction 24 hours. Naturally cooled to room temperature, the cooled product was collected, washed repeatedly with deionized water and absolute ethanol, and dried in vacuum at 60°C to obtain a yellowish-brown product. Such as figure 1 As shown, the XRD results show that the product is ZnSe with a cubic sphalerite structure; the SEM results show that the product is composed of nanoparticles with a diameter of about 100 nm, such as figure 2 .

Embodiment 2

[0021] Put 1 mmol of analytically pure selenium powder (Se) into the polytetrafluoroethylene lining, and add ethanolamine solvent so that the volume of the solution accounts for 80% of the total volume of the polytetrafluoroethylene lining. Magnetically stirred for several minutes, then added 2mmol of analytically pure zinc acetate (Zn(CH 3 COO) 2 2H 2 0), continue magnetic stirring until evenly sealed reaction kettle, placed in 200 ℃ oven reaction 24 hours. Naturally cooled to room temperature, the cooled product was collected, washed repeatedly with deionized water and absolute ethanol, and dried in vacuum at 60°C to obtain a yellowish-brown product. XRD results show that the product is ZnSe with hexagonal wurtzite structure, such as image 3 ; SEM results show that the product is composed of nanosheets with a thickness of about 100 nm, such as Figure 4 shown.

Embodiment 3

[0023] 1 mmol analytically pure sodium tellurite (Na 2 TeO 3 ) into the polytetrafluoroethylene lining, adding ethanolamine solvent to make the solution volume account for 80% of the total volume of the polytetrafluoroethylene lining. Magnetically stirred for several minutes, then added 2mmol of analytically pure zinc acetate (Zn(CH 3 COO) 2 2H 2 0), continue magnetic stirring until evenly sealed reaction kettle, placed in 200 ℃ oven reaction 24 hours. Naturally cooled to room temperature, the cooled product was collected, washed repeatedly with deionized water and absolute ethanol, and dried under vacuum at 60°C to obtain a black product. XRD results show that the product is ZnTe with cubic sphalerite structure, such as Figure 5 ; SEM results show that the product is composed of nanoparticle aggregates with a diameter of about 100 nm, such as Figure 6 .

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Abstract

The invention discloses a solvothermal controllable method for preparing ZnSe and ZnTe nano materials. The method comprises the following steps of: placing a Se source or Te source of an analytical reagent in an polytetrafluoroethylene inner lining; adding an ethanolamine solvent to ensure that the solution is 80 percent based on the total volume of the polytetrafluoroethylene inner lining; performing magnetic stirring for several minutes; adding the Zn source of the analytical reagent again; performing magnetic stirring uniformly and then sealing a reaction kettle; and placing in a baking oven at the temperature of 200 DEG C and reacting for 24 hours, after completing the reaction, cleaning to obtain a product. The ZnSe and ZnTe nano materials with a blende or wurtzite structure can be controllably synthesized successfully in one step in the same system by changing the Se source or the Te source through a simple solvothermal method under the mild condition for the first time. The method has the characteristics of simplicity, low cost, high yield, high uniformity of products, high controllability, environment friendliness and easiness in popularization and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, and in particular relates to a method for preparing ZnSe and ZnTe nanometer materials with controllable phase and appearance by using solvothermal technology. Background technique [0002] ZnSe and ZnTe, as important wide-bandgap II-VI semiconductor materials, have been paid attention to by people, and have broad application prospects in the fields of optoelectronic devices, biosensors, photocatalysis, and solar materials. ZnSe and ZnTe (with a band gap of 2.7ev and 2.26eV respectively) have the advantages of wide band gap, direct band transition, and can work under high temperature conditions, and can be used to make nonlinear optoelectronic devices, blue-green laser devices, photodetectors and Nuclear radiation detectors, etc. Nanostructured ZnSe and ZnTe materials have specific properties that many macroscopic materials do not have, such as small size effect, surface effect, ...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00
Inventor 吴荣姜楠楠简基康潘东李锦孙言飞
Owner XINJIANG UNIVERSITY
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