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Metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon synthesis method

A nano-particle and nano-foam technology, which is applied in the synthesis field of nitrogen-doped nano-foam carbon, can solve the problems of poor electrical conductivity and poor structural stability, and achieve the effects of environmental protection, easy large-scale production and simple process.

Active Publication Date: 2015-12-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most metal oxides have poor conductivity and poor structural stability during the electrochemical reaction, so they need to be combined with carbon materials to improve their overall performance.

Method used

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  • Metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon synthesis method
  • Metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon synthesis method
  • Metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon synthesis method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve 1.5g ferric nitrate nonahydrate and 1g polyvinylpyrrolidone (K30, molecular weight: 40000) in 20mL deionized water, and dissolve the resulting mixed solution in 100 o Dry under C, and the gained solid is ground into a powder;

[0021] (2) The powder prepared in step (1) is heated to 700°C in nitrogen flow o C, control the heating rate to 20 o C min -1 , The calcination time is 1 hour. After the reaction finishes, obtain silver-gray foamy carbon macrobody;

[0022] (3) the carbon foam prepared in step (2) is heated to 290 in air o C, the calcination time is 3 hours, and the foamed carbon embedded with ferric oxide hollow nanoparticles is obtained. Its macropore diameter distribution is between 5-8μm, the pore wall thickness is about 50nm, the carbon content is about 22wt.%, the nitrogen content is about 1%, and the specific surface area is 230m 2 g -1 .

Embodiment 2

[0024] (1) Dissolve 1.5g nickel nitrate hexahydrate and 1g polyvinylpyrrolidone (K30, molecular weight: 40000) in 20mL deionized water, and dissolve the resulting mixed solution in 100 o Dry under C, and the gained solid is ground into a powder;

[0025] (2) The powder prepared in step (1) is heated to 700°C in nitrogen flow o C, control the heating rate to 5 o C min -1 , The calcination time is 1 hour. After the reaction finishes, obtain silver-gray foamy carbon macrobody;

[0026] (3) the carbon foam prepared in step (2) is heated to 290 in air o C, the calcination time is 3 hours, and the carbon foam embedded with nickel oxide hollow nanoparticles is obtained. The pore size distribution of its macropores is between 5-10μm, the pore wall thickness is about 60-100nm, the carbon content is about 29wt.%, and the size of nickel oxide hollow nanoparticles is mainly distributed between 10-40nm.

Embodiment 3

[0028] (1) Dissolve 1.5g of cobalt nitrate hexahydrate and 1g of polyvinylpyrrolidone (K30, molecular weight: 40000) in 20mL of deionized water, and dissolve the resulting mixed solution in 100 o Dry under C, and the gained solid is ground into a powder;

[0029] (2) The powder prepared in step (1) is heated to 700°C in nitrogen flow o C, control the heating rate to 5 o C min -1 , The calcination time is 1 hour. After the reaction finishes, obtain silver-gray foamy carbon macrobody;

[0030] (3) the carbon foam prepared in step (2) is heated to 200 in air o C, the calcination time is 3 hours, and the foamed carbon embedded with ferric oxide hollow nanoparticles is obtained. Its macropore diameter is about 5-9μm, the pore wall thickness is about 70nm, the carbon content is about 24wt.%, the nickel oxide content is about 76wt.%, the cobalt oxide hollow nano-particle size is between 5-15nm, and the specific surface area is 260m 2 g -1 .

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Abstract

The invention discloses a metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon synthesis method and belongs to the field of novel energy and novel materials. The synthesis method comprises that through high temperature calcining and low temperature oxidation, the metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon is prepared from metal nitrates as metal oxide precursors and foaming agents, and a nitrogen-containing organic molecule as a carbon source and nitrogen source precursor. The synthesis method utilizes the cheap and easily available organic polymer and a plurality of common metal nitrates as precursors to prepare the metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon. The synthesis method has simple processes, is free of a template, realizes accurate adjustment and control of the foamy carbon structure by change of a metal salt / polyvinylpyrrolidone ratio or calcining conditions, is environmentally friendly and can be industrialized easily. The metal oxide hollow nanometer particle-embedded nitrogen-doped nanometer foamy carbon has a wide application prospect in the fields of energy storage, catalysis, photoelectric materials and drug transport.

Description

technical field [0001] The invention relates to a synthesis method of nitrogen-doped nano-foamed carbon embedded with metal oxide hollow nanoparticles, belonging to the field of new energy and new materials. Background technique [0002] Foamed carbon is a kind of functional material with excellent comprehensive properties. It has good chemical stability, thermal stability, and electrical conductivity. Energy batteries (such as lithium-ion batteries), supercapacitors and other fields are widely used. However, the chemical composition of conventional carbon foam materials is single, the pore size is tens to hundreds of microns, the pore wall thickness is on the order of microns, and the specific surface area is low, which greatly limits its energy storage density per unit volume / mass, so it is difficult to meet high energy density. The needs of battery manufacturing. [0003] Metal oxides are low in cost, rich in sources and various in variety. They exhibit unique propertie...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01G49/06C01G53/04C01G51/04B82Y30/00
Inventor 邱介山赵宗彬王治宇董琰峰
Owner DALIAN UNIV OF TECH
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