Preparation method and application of hollow structure Co3O4/CeO2 nanoparticle loaded nitrogen doped carbon nanofiber material

A technology of nanofibers and hollow structures, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of complex synthesis paths and difficult uniform loading of catalysts, and achieve broad application prospects and improve catalytic performance. Reaction rate, the effect of more active sites

Active Publication Date: 2019-08-16
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of such materials faces the problems of complex synthetic routes and difficult uniform loading of catalysts.
Therefore, seeking a simple and economical synthetic route to make Co 3 o 4 / CeO 2 The close combination of nanoparticles and carbon nanofibers is the key to research, and it is still extremely challenging

Method used

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  • Preparation method and application of hollow structure Co3O4/CeO2 nanoparticle loaded nitrogen doped carbon nanofiber material
  • Preparation method and application of hollow structure Co3O4/CeO2 nanoparticle loaded nitrogen doped carbon nanofiber material
  • Preparation method and application of hollow structure Co3O4/CeO2 nanoparticle loaded nitrogen doped carbon nanofiber material

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Experimental program
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Embodiment 1

[0044] A nitrogen-doped carbon nanofiber loaded hollow structure of Co 3 o 4 / CeO 2 The preparation method of composite material, comprises the following steps:

[0045] 1)Co 2+ / C 3+ / PVP mixed sol preparation: weigh 1.0g PVP with 6ml DMF and 6ml C 2 h 5 OH solution was mixed, and 1.0mmol of Co(NO 3 ) 2 ·6H 2 O with 0.5mmol Ce(NO 3 ) 3 ·6H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get red Co 2+ / C 3+ / PVP sol;

[0046] 2) Electrospinning method to prepare nitrogen-doped carbon nanofibers loaded with hollow structure Co 3 o 4 / CeO 2 Composite material: the red Co obtained in step 1) 2+ / C 3+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , Voltage 22KV, the solid carbon fiber film material obtained, firstly undergoes pre-oxidation treatment in the air at 200°C for 3h, and then in N 2 Under the atmosphe...

Embodiment 2

[0049] A nitrogen-doped carbon nanofiber loaded hollow structure of Co 3 o 4 / CeO 2 The preparation method of composite material, comprises the following steps:

[0050] 1)Co 2+ / C 3+ / PVP mixed sol preparation: weigh 1.0g PVP with 6ml DMF and 6ml C 2 h 5 OH solution was mixed, and 1.0mmol of Co(NO 3 ) 2 ·6H 2 O with 0.25mmol Ce(NO 3 ) 3 ·6H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get red Co 2+ / C 3+ / PVP sol;

[0051] 2) Nitrogen-doped carbon nanocomposites loaded with hollow structures of Co prepared by electrospinning 3 o 4 / CeO 2 Composite material: the red Co obtained in step 1) 2+ / C 3+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , Voltage 22KV, the solid carbon fiber film material obtained, firstly undergoes pre-oxidation treatment in the air at 200°C for 3h, and then in N 2 Under the atmos...

Embodiment 3

[0053] A nitrogen-doped carbon nanofiber loaded hollow structure of Co 3 o 4 / CeO 2The preparation method of composite material, comprises the following steps:

[0054] 1)Co 2+ / C 3+ / PVP mixed sol preparation: weigh 1.0g PVP with 6ml DMF and 6ml C 2 h 5 OH solution was mixed, and 1.0mmol of Co(NO 3 ) 2 ·6H 2 O with 0.75mmol Ce(NO 3 ) 3 ·6H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get red Co 2+ / C 3+ / PVP sol;

[0055] 2) Nitrogen-doped carbon nanocomposites loaded with hollow structures of Co prepared by electrospinning 3 o 4 / CeO 2 Composite material: the red Co obtained in step 1) 2+ / C 3+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , Voltage 22KV, the solid carbon fiber film material obtained, firstly undergoes pre-oxidation treatment in the air at 200°C for 3h, and then in N 2 Under the atmosp...

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Abstract

The invention discloses a preparation method of a hollow structure Co3O4/CeO2 nanoparticle loaded nitrogen doped carbon nanofiber material and application thereof. The preparation method comprises thefollowing steps: 1) preparing a CO<2+>/Ce<3+>/PVP mixed sol; 2) electrospinning the CO2+/Ce3+/PVP mixed sol to obtain a solid carbon fiber film; and 3) preoxidizing the solid carbon fiber film in anair atmosphere of 200-300 DEG C, performing heat treatment in an inert atmosphere of 400-1000 DEG C with programmed temperature rise, and obtaining the hollow structure Co3O4/CeO2 nanoparticle loadednitrogen doped carbon nanofiber composite material by utilizing the Kirkendall effect of nano materials. The preparation method is low in cost, simple and universal. The prepared material is a one-dimensional carbon nanofiber material; hollow Co3O4/CeO2 composite nanoparticles are uniformly embedded in carbon nanofiber; and the material can be used as an electrolytic water oxygen evolution electrocatalytic material and has higher activity and excellent stability.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon nanofiber loaded hollow structure Co 3 o 4 / CeO 2 The preparation method of nano particle material and the obtained material and application belong to the technical field of alkaline oxygen evolution reaction catalyst. Background technique [0002] With the rapid consumption of fossil energy and the increasingly prominent environmental pollution problems, the demand for clean, green and sustainable energy is becoming more and more urgent. Various types of sustainable energy conversion and storage devices, such as renewable fuel cells, solar cells, rechargeable metal-air batteries, and water electrolysis devices, have received extensive attention due to their cleaner, environmentally friendly, and sustainable energy supply advantages. In the research on the above devices, the electrocatalytic oxygen evolution reaction (OER, 4OH - →2H 2 O+O 2 +4e - ), which has attracted the interest of researchers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C25B11/06C25B1/04
CPCB01J27/24B01J35/0033B01J35/1004C25B11/04C25B1/04Y02E60/36
Inventor 徐林李同飞田业超周航天李蕾吴星悦孙冬梅唐亚文
Owner NANJING NORMAL UNIVERSITY
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