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Method for preparing yolk-shell structure Co9Se8 nano-particles

A nanoparticle and shell structure technology, applied in nanotechnology, nanotechnology, structural parts, etc., can solve the problems of no yolk-shell structure nanoparticles, etc., and achieve good application prospects, process controllability, and simple preparation methods.

Active Publication Date: 2018-01-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the literature survey is concerned, no yolk-shell structure Co 9 Se 8 Report on Nanoparticles

Method used

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  • Method for preparing yolk-shell structure Co9Se8 nano-particles
  • Method for preparing yolk-shell structure Co9Se8 nano-particles
  • Method for preparing yolk-shell structure Co9Se8 nano-particles

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Weigh Co(NO 3 ) 2 ·6H 2 O powder 0.1g, glycerol 8ml were dissolved in 40ml isopropanol to form a mixed solution. Stir the prepared solution ultrasonically for 20 minutes, transfer the mixed solution after stirring to a polytetrafluoroethylene reactor for hydrothermal treatment, keep the hydrothermal temperature at 180 ° C, and keep the hydrothermal time at 6 hours. After the reaction is completed, the powder Centrifugal cleaning was carried out to obtain a Co spherical precursor. Take 40mg of Co spherical precursor and 20ml of deionized water to make a mixed solution, add 10mg of selenous acid and 10ml of hydrazine hydrate solution in turn, stir for 2min, transfer the mixed solution to the reactor for hydrothermal treatment, and keep the hydrothermal temperature at 180 ℃, the hydrothermal time is kept at 24h, and the powder after the reaction is centrifuged to clean, and finally the egg yolk-shell structure Co 9 Se 8 nanoparticles.

Embodiment 2

[0022] Weigh Co(NO 3 ) 2 ·6H 2 O powder 0.2g, glycerol 16ml were dissolved in 80ml isopropanol to form a mixed solution. Stir the prepared solution ultrasonically for 20 minutes, transfer the mixed solution after stirring to a polytetrafluoroethylene reactor for hydrothermal treatment, keep the hydrothermal temperature at 180°C, and keep the hydrothermal time at 8h. After the reaction is completed, the powder Centrifugal cleaning was carried out to obtain a Co spherical precursor. Take 30mg of Co spherical precursor and 15ml of deionized water to make a mixed solution, add 10mg of selenous acid and 10ml of hydrazine hydrate solution in turn, stir for 2min, transfer the mixed solution to the reactor for hydrothermal treatment, and keep the hydrothermal temperature at 180 ℃, the hydrothermal time is kept at 24h, and the powder after the reaction is centrifuged to clean, and finally the egg yolk-shell structure Co 9 Se 8 nanoparticles.

Embodiment 3

[0024] Weigh Co(NO 3 ) 2 ·6H 2 O powder 0.1g, glycerol 8ml were dissolved in 40ml isopropanol to form a mixed solution. Stir the prepared solution ultrasonically for 20 minutes, transfer the mixed solution after stirring to a polytetrafluoroethylene reactor for hydrothermal treatment, keep the hydrothermal temperature at 180 ° C, and keep the hydrothermal time at 6 hours. After the reaction is completed, the powder Centrifugal cleaning was carried out to obtain a Co spherical precursor. Take 40mg of Co spherical precursor and 20ml of deionized water to make a mixed solution, add 20mg of selenous acid and 20ml of hydrazine hydrate solution in turn, stir for 2min, transfer the mixed solution to the reactor for hydrothermal treatment, and keep the hydrothermal temperature at 200 ℃, the hydrothermal time is kept at 24h, and the powder after the reaction is centrifuged to clean, and finally the egg yolk-shell structure Co 9 Se 8 nanoparticles.

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Abstract

The invention provides a method for preparing yolk-shell structure Co9Se8 nano-particles. The process comprises the following steps: 1, respectively adding cobalt-nitrate hexahydrate (Co(NO3)2.6H2O) and glycerol into isopropyl alcohol to prepare a mixed solution, and performing ultrasonic stirring; 2, transferring the stirred mixed solution into a reaction kettle for hydrothermal treatment at 180DEG C for 3-9 hours, and centrifugally washing the powder generated in reactions to obtain a Co spherical precursor; and 3, preparing a mixed solution from the Co spherical precursor and deionized water, sequentially adding seleninic acid and hydrazine hydrate solution, stirring for 1-5 minutes, transferring the mixed solution into the reaction kettle for hydrothermal treatment at 140-200 DEG C for 12-36 hours, and centrifugally washing the powder after the reaction is completed to obtain the yolk-shell structure Co9Se8 nano-particles. The yolk-shell structure Co9Se8 nano-particles prepared bycontrolling reaction conditions of growth and selenylation of the precursor has a simple method, short production cycle and regular powder shape, and has an excellent application prospect in the field of ionic batteries.

Description

technical field [0001] The invention belongs to the field of functional nanomaterials, in particular to an egg yolk-shell structure Co 9 Se 8 Preparation method of nanoparticles. Background technique [0002] Metal selenium compounds are a very important class of semiconductor compound materials, including II-VI group (such as CdSe, ZnSe, etc.) It has very important applications in the fields of semiconductor light-emitting devices, nonlinear optical materials, thermoelectric materials, photosensitive elements, photoelectric conversion devices, gas sensitive elements, ion batteries and catalysts. At the same time, their preparation methods have also become nanometer research hotspots in the field. [0003] Cobalt selenide has been extensively studied in the fields of solar cells, sensors, electrocatalysts, and ion batteries due to its diverse properties. Since the reactivity of selenium is much lower than that of oxygen and sulfur in the same family, the preparation of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00B82Y40/00H01M4/36H01M4/58
CPCY02E60/10
Inventor 李平刘志伟王伟锁国权韩坤谭奇伟曲选辉秦明礼
Owner UNIV OF SCI & TECH BEIJING
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