Preparation method, product and application of Te nanomaterial with controllable morphology

A nano-material and morphology technology, applied in the field of preparation of Te materials, can solve problems such as poor controllability, and achieve the effects of low production cost, easy availability of raw materials, and high purity

Pending Publication Date: 2022-01-11
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of Te synthesized by hydrothermal reaction reported so far are one-dimensional rods and some are two-dimensional flakes, and the controllability is poor.

Method used

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  • Preparation method, product and application of Te nanomaterial with controllable morphology
  • Preparation method, product and application of Te nanomaterial with controllable morphology
  • Preparation method, product and application of Te nanomaterial with controllable morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1, weigh 0.0462g Na 2 TeO 3 and 1.5g of PVP with an average molecular weight of 8000, the Na 2 TeO 3 Add 16mL of deionized water, stir evenly, then add PVP, stir again to obtain a transparent gel-like mixed solution A;

[0038] Step 2, add 1.66mL of ammonia water and 0.840mL of hydrazine monohydrate to the mixed solution A, stir well, transfer to the lining of a 25mL reaction kettle, seal and put it in a blast drying oven for 14 hours at 180°C;

[0039] Step 3. After the hydrothermal reaction in step 2 is completed, immediately cool it with running water at 15°C, add 10 mL of deionized water to the obtained solution, set the centrifugation speed at 5000r / min and the centrifugation time for 10min, centrifuge twice, and separate And the precipitate was washed to obtain Te nanomaterials with controllable morphology. Finally, 15ml of deionized water is added to the precipitate for dispersion. (The purpose of dispersion: we are to obtain Te solution, which is spin-c...

Embodiment 2

[0042] Step 1, weigh 0.0462g Na 2 TeO 3 and 1.5g of PVP with an average molecular weight of 360000, the Na 2 TeO 3 Add 16mL of deionized water, stir evenly, then add PVP, stir again to obtain a transparent gel-like mixed solution A;

[0043] Step 2, add 1.66mL of ammonia water and 0.840mL of hydrazine monohydrate to the mixed solution A, stir well, transfer to the lining of a 25mL reaction kettle, seal and put it in a blast drying oven for 14 hours at 180°C;

[0044] Step 3: After the hydrothermal reaction in step 2 is completed, immediately cool it with running water at 15°C, add 10 mL of deionized water to the obtained solution, set the centrifugation speed at 5000r / min, centrifugation time at 10min, and centrifuge twice. The precipitate was separated and washed to obtain Te nanomaterials with controllable morphology. Finally, 15ml of deionized water is added to the precipitate for dispersion. (The purpose of dispersion: we are to obtain Te solution, which is spin-coated...

Embodiment 3

[0047] Step 1, weigh 0.0462g Na 2 TeO 3 and 1.5g of PVP with an average molecular weight of 1,300,000, the Na 2 TeO 3 Add 16mL of deionized water, stir evenly, then add PVP, stir again to obtain a transparent gel-like mixed solution A;

[0048] Step 2, add 1.66mL of ammonia water and 0.840mL of hydrazine monohydrate to the mixed solution A, stir well, transfer to the lining of a 25mL reaction kettle, seal and put it in a blast drying oven for 14 hours at 180°C;

[0049] Step 3: After the hydrothermal reaction in step 2 is completed, immediately cool it with running water at 15°C, add 10 mL of deionized water to the obtained solution, set the centrifugation speed at 5000r / min, centrifugation time at 10min, and centrifuge twice. The precipitate was separated and washed to obtain Te nanomaterials with controllable morphology. Finally, 15ml of deionized water is added to the precipitate for dispersion. (The purpose of dispersion: we are to obtain Te solution, which is spin-coa...

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Abstract

The invention discloses a preparation method, a product and application of a Te nanomaterial with controllable morphology, and relates to the technical field of preparation of Te materials. The preparation method comprises the following steps: adding polyvinylpyrrolidone, an alkaline solution and hydrazine monohydrate into an aqueous sodium tellurite solution, and carrying out a hydrothermal reaction to obtain the morphology-controllable Te nanomaterial. When the average molecular weight of the polyvinylpyrrolidone is 8000, the morphology of the prepared Te nanomaterial is in a two-dimensional sheet shape; and when the average molecular weight of the polyvinylpyrrolidone is 360000 or 1300000, the morphology of the prepared Te nanomaterial is in a one-dimensional linear shape. By changing the average molecular weight of PVP, the growth speed of each crystal face of a Te material can be different, so the Te nanomaterial with a two-dimensional sheet shape and a small aspect ratio or with a one-dimensional linear shape and a large aspect ratio is respectively prepared.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method, product and application of a Te material with controllable morphology. Background technique [0002] Tellurium (Te) is an important elemental semiconductor material, which is formed by stacking single helical chains of Te atoms through van der Waals forces. Te is generally a P-type semiconductor material with a direct band gap. The band gap of the bulk material at room temperature is 0.32eV, and the hole mobility is about 590 cm 2 / V•S -1 . In the past decade, great progress has been made in the exploration of various Te nanostructures, and a series of Te nanomaterials with different morphologies, such as nanorods, nanowires, nanotubes, and nanosheets, have been successfully prepared and studied in detail. , Feather Te, etc. The morphology and size of Te can control its performance, which has an inseparable relationship with its applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02
CPCC01B19/02C01P2004/10C01P2004/20
Inventor 宋孝辉胡艳杰吕晓静刘振马梓楠
Owner HENAN NORMAL UNIV
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