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3D Te nanowire aerogel, and preparation method and application of aerogel

A nanowire and airgel technology, applied in the field of Te nanowire three-dimensional airgel, can solve the problems of cumbersome steps and long time consumption

Active Publication Date: 2019-08-02
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

This method is cumbersome and time-consuming

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  • 3D Te nanowire aerogel, and preparation method and application of aerogel
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  • 3D Te nanowire aerogel, and preparation method and application of aerogel

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[0026] The invention provides a method for preparing a Te nanowire three-dimensional airgel, comprising the following steps:

[0027] Disperse one-dimensional Te nanowires in an alcoholic solvent, preassemble with lead nitrate and perform hydrothermal reaction in an autoclave to obtain Te nanowire three-dimensional hydrogel;

[0028] The Te nanowire three-dimensional hydrogel is supercritically dried to obtain the Te nanowire three-dimensional airgel.

[0029] The invention firstly provides one-dimensional Te nanowires, then redisperses the one-dimensional Te nanowires into ethylene glycol, adds lead nitrate to pre-assemble the nanowires, then pours the solution into the substrate of the reaction kettle, and reacts under high temperature and high pressure After a period of time, a macroscale three-dimensional Te wire hydrogel is formed, and the hydrogel is supercritically dried with carbon dioxide to obtain a macroscale three-dimensional Te wire aerogel. The method is simple ...

Embodiment 1

[0043] Synthesis of Tellurium Nanowires with a Diameter of 7nm

[0044] Add 0.922g of sodium tellurite, 10g of polyvinylpyrrolidone, and 330mL of deionized water into a 500mL reactor and stir to dissolve, then add 33.5mL of ammonia water and 16.5mL of hydrazine hydrate, stir for 10 minutes, and then put it in an oven at 180°C for 3 hours. Take out the reaction kettle and let it cool down to room temperature naturally.

[0045] Synthesis of 3D Te Nanowire Hydrogels

[0046] Add 0.52g of 500mL of Te nanowires obtained by the above preparation method to centrifuge and precipitate with acetone, wash with ethanol and centrifuge again, disperse in 40mL of ethylene glycol, add 1g of lead nitrate, stir until the lead nitrate is completely dissolved, put in 50mL of reaction Heat in water at 120° C. for 36 hours in a kettle, and take out after cooling to obtain a three-dimensional Te nanowire hydrogel. After supercritical carbon dioxide drying, three-dimensional Te nanowire aerogels w...

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Abstract

The invention provides 3D (three-dimensional) Te nanowire aerogel, and a preparation method and an application of the aerogel. The method comprises the following steps: dispersing 1D (one-dimensional)Te nanowires in an alcohol solvent for hydrothermal reaction in a high-pressure reaction kettle after preassembly with lead nitrate to form 3D Te nanowire hydrogel, and performing supercritical drying on the 3D Te nanowire hydrogel to form the 3D Te nanowire aerogel. The 1D Te nanowires are preassembled under induction of lead ions; the assembled nanowires are heated to form 2D (two-dimensional)nanoribbons; cross-linked network structure is formed in a 3D direction; and the macroscale 3D Te nanowire hydrogel is obtained finally. The method is simple, and isotropic 3D Te nanowires that are uniform in size can be assembled.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial assembly, and in particular relates to a Te nanowire three-dimensional airgel, its preparation method and its application. Background technique [0002] The controllable synthesis and effective assembly of metal or semiconductor nanomaterials, as well as device design and performance research based on nanomaterials are one of the prerequisites and guarantees for their application. "German Applied Chemistry" (Angew.Chem.Int.Ed.2015, Issue 54, Page 13101) pointed out that nanomaterial components in the form of macroscopic airgel frameworks caused nanoscale problems due to their extremely high porosity and large specific surface area. Great interest in the technological revolution. "Advanced Materials" (Advance Materials, No. 30, 2018) pointed out that aerogels assembled from colloidal metal or semiconductor nanocrystals (NCs) have large surface areas, ultra-low densities, and high porosity, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02B01J13/00B82Y30/00B82Y40/00
CPCC01B19/02B01J13/0095B82Y30/00B82Y40/00C01P2004/03C01P2004/04C01P2004/62C01P2004/61
Inventor 刘建伟王康
Owner UNIV OF SCI & TECH OF CHINA
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