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Method for preparing Co3O4 nanometer sheet

A technology of nanosheets and cobalt chloride, which is applied in the field of preparation of cobalt oxide nanosheets to achieve the effects of easy operation, low cost and high product purity

Inactive Publication Date: 2011-08-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using polyvinylpyrrolidone (PVP) as a soft template and urea as a precipitating agent, the preparation of nano-sheet basic cobalt carbonate Co 2 (OH) 2 CO 3 precursor, and obtained Co after heat treatment 3 o 4 The nanosheet method has not been reported

Method used

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  • Method for preparing Co3O4 nanometer sheet
  • Method for preparing Co3O4 nanometer sheet
  • Method for preparing Co3O4 nanometer sheet

Examples

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Effect test

Embodiment 1

[0020] 2mmol cobalt chloride CoCl 2 ·6H 2 O, 6mmol urea CO(NH 2 ) 2 Dissolve in 20mL of distilled water, then add 1.005g of PVP, and dissolve it completely under magnetic stirring, transfer the mixed solution into a 50mL stainless steel autoclave lined with polytetrafluoroethylene, the filling degree is 80%, after sealing It was heated to 160° C., kept at a temperature of 8 hours, and then naturally cooled to room temperature. The gray precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 80° C. for 6 hours to obtain the precursor. Then calcined at 500°C for 5 hours, the obtained black product is Co 3 o 4 Nanosheets. The resulting black product was directly observed under a scanning electron microscope to obtain figure 1 As shown in the structure, it can be found that the precursor product is composed of a large number of rectangular nanosheets. These nanosheets are uniform in size, with a length and width of about 5 μm×...

Embodiment 2

[0022] 2mmol cobalt chloride CoCl 2 6H2O, 6mmol urea CO(NH 2 ) 2 Dissolve in 20mL of distilled water, then add 1.005g of PVP, and dissolve it completely under magnetic stirring, transfer the mixed solution into a 50mL stainless steel autoclave lined with polytetrafluoroethylene, the filling degree is 80%, after sealing It was heated to 160° C., kept at this temperature for 12 hours, and then naturally cooled to room temperature. The gray precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 80° C. for 6 hours to obtain the precursor. Then calcined at 500°C for 5 hours, the obtained black product is Co 3 o 4 Nanosheets. The morphology of the product, properties such as structure and composition are all similar to Example 1.

Embodiment 3

[0024] 2mmol cobalt chloride CoCl 2 ·6H 2 O, 6mmol urea CO(NH 2 ) 2 Dissolve in 20mL of distilled water, then add 1.005g of PVP, and dissolve it completely under magnetic stirring, transfer the mixed solution into a 50mL stainless steel autoclave lined with polytetrafluoroethylene, the filling degree is 80%, after sealing It was heated to 180° C., kept at this temperature for 8 hours, and then naturally cooled to room temperature. The gray precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 80° C. for 6 hours to obtain the precursor. Then calcined at 500°C for 5 hours, the obtained black product is Co 3 o 4 Nanosheets. The morphology of the product, properties such as structure and composition are all similar to Example 1.

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Abstract

The invention discloses a method for preparing cobalt oxide (Co3O4) serving as an inorganic material, and particularly relates to a method for preparing a Co3O4 nanometer sheet, which comprises the following steps of: dissolving cobalt chloride and urea in distilled water, and adding polyvinyl pyrrolidone to form mixed solution; putting the mixed solution into a reaction kettle for reacting for a certain time period, and cooling naturally to the room temperature; performing precipitating, centrifugal separation and washing on a reaction material to obtain Co2(OH)2CO3 serving as a precursor; and calcining the precursor to obtain the Co3O4 nanometer sheet serving as the product. The method has the advantages of high process controllability, low cost and high purity of the prepared product, and is easy to operate. The prepared product has the wide application range in semiconductor industry.

Description

technical field [0001] The present invention relates to a kind of inorganic material cobalt oxide (Co 3 o 4 ) preparation method, especially the preparation method of cobalt oxide nanosheets. technical background [0002] Low-dimensional nanomaterials such as nanorods, nanosheets, and nanotubes have broad application prospects in important components of nanodevices due to their unique physical properties. Cobalt oxide (Co 3 o 4 ) is an important semiconductor transition metal oxide with excellent electrical properties, and has good application prospects in the fields of catalysts, magnetic materials, battery materials, solar generators, and solid-state sensors. metal base salt M x (OH) y (X) z ·nH 2 O (M: metal, X: anion) is a metal base salt with a layered structure. First, by controlling the anion and the positively charged [M(OH) 2-x ] x+ The interaction of layers can effectively control the morphology of precursor intermediates; secondly, during the heat treat...

Claims

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Application Information

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IPC IPC(8): C01G51/04B82Y40/00
Inventor 王顺利唐为华李培刚朱晖文
Owner ZHEJIANG SCI-TECH UNIV
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