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A preparation method of carbon nanotube-loaded double metal oxide hollow nanoparticles

A double metal oxide and carbon nanotube technology, applied in the direction of nanotechnology, nanotechnology, nickel oxide/nickel hydroxide, etc., can solve the problem of affecting the purity of the hollow structure, large size of the hollow structure, difficult double metal oxide hollow structure materials and other problems, to achieve good thermal stability, increase the specific surface area, and simple process

Inactive Publication Date: 2016-01-20
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although this method has certain versatility, the size of the hollow structure is large, and the "free" metal salt between the carbon microspheres obtains solid particles after calcination, which affects the purity of the hollow structure; we are in AdvancedFunctionalMaterials18 (2012): 3914-3920 reported the interfacial redox method to prepare CeMnO x , CeFeO x 、CoMnO x and other double metal oxide hollow nanotubes. Although this method has mild conditions, it is difficult to popularize and prepare more double metal oxide hollow structure materials.

Method used

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  • A preparation method of carbon nanotube-loaded double metal oxide hollow nanoparticles
  • A preparation method of carbon nanotube-loaded double metal oxide hollow nanoparticles
  • A preparation method of carbon nanotube-loaded double metal oxide hollow nanoparticles

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Embodiment 1

[0029] Carbon nanotube supported FeNiO x Preparation method of hollow nanoparticles

[0030] A. Disperse 5g of carbon nanotubes in 50ml of concentrated nitric acid, and reflux at 140°C for 2h to pretreat the surface of the carbon nanotubes;

[0031] B. Weigh 2mmolFe(NO 3 ) 3 , 2mmolNi(NO 3 ) 2 Dissolve in absolute ethanol; disperse 20 mmol of the surface-pretreated carbon nanotubes obtained in step A in an ethanol solution, ultrasonically, disperse, and stir until the solvent is completely volatilized to obtain a dry solid;

[0032] C. Preheat the dry solid obtained in step B under a nitrogen atmosphere. The preheating temperature is 120° C., and the holding time is 2 hours; 650℃, keep warm for 2h;

[0033] D. Oxidize the material obtained in step C in an air atmosphere, the oxidation temperature is 400°C, the heating rate is 3°C / min, and the temperature is kept for 2h, and then FeNiO supported by carbon nanotubes can be obtained x Double metal oxide hollow nanoparticle...

Embodiment 2

[0035] Carbon nanotube supported FeCoO x Preparation method of hollow nanoparticles

[0036] A. Disperse 5 g of carbon nanotubes in 50 ml of concentrated nitric acid, and reflux for 2 hours at 140° C. for pre-surface treatment of carbon nanotubes;

[0037] B. Weigh 2mmolFe(NO 3 ) 3 , 2mmolCo(NO 3 ) 2 Dissolve in absolute ethanol; disperse 20 mmol of the surface-pretreated carbon nanotubes obtained in step A in an ethanol solution, ultrasonically, disperse, and stir until the solvent is completely volatilized to obtain a dry solid;

[0038] C. Preheat the dry solid obtained in step B under a nitrogen atmosphere. The preheating temperature is 120° C., and the holding time is 2 hours; 650℃, keep warm for 2h;

[0039] D. Oxidize the material obtained in step C in an air atmosphere, the oxidation temperature is 400°C, the heating rate is 3°C / min, and the temperature is kept for 2h, and then FeCoO supported by carbon nanotubes can be obtained x Double metal oxide hollow nanop...

Embodiment 3

[0041] Carbon nanotube supported NiCoOx Preparation method of hollow nanoparticles

[0042] A. Disperse 5 g of carbon nanotubes in 50 ml of concentrated nitric acid, and reflux for 2 hours at 140° C. for pre-surface treatment of carbon nanotubes;

[0043] B. Weigh 1.33mmolNi(NO 3 ) 2 , 2.66mmolCo(NO 3 ) 2 Dissolve in absolute ethanol; disperse 20 mmol of the surface-pretreated carbon nanotubes obtained in step A in an ethanol solution, ultrasonically, disperse, and stir until the solvent is completely volatilized to obtain a dry solid;

[0044] C. Preheat the dry solid obtained in step B under a nitrogen atmosphere. The preheating temperature is 120° C., and the holding time is 2 hours; 650℃, keep warm for 2h;

[0045] D. Oxidize the material obtained in step C in an air atmosphere, the oxidation temperature is 400°C, the heating rate is 3°C / min, and the temperature is kept for 2h, and then NiCoO supported by carbon nanotubes can be obtained x Double metal oxide hollow n...

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Abstract

The invention provides a preparation method for carbon nano tube-loaded double-metal oxide hollow nano-particles. The preparation method comprises the following steps: mixing two metal salt liquor with carbon nano tubes, drying, and then directly reducing under a hydrogen gas atmosphere to obtain carbon nano tube-loaded double-metal nano-particles; and converting the hydrogen gas into air, carrying out oxidization, and controlling a heating rate, a final temperature and heat-preservation time to obtain the carbon nano tube-loaded double-metal oxide hollow nano-particles. The double-metal oxide hollow nano-particles prepared by adopting the method provided by the invention are high in crystallinity; a proportion of metal components and loading amount of the carbon nano tubes can be controlled by regulating a metal salt precursor proportion and concentration. The preparation method provided by the invention is simple and easy to implement, high in controllability, small in pollution and low in cost and has certain universality. The prepared product has a carbon-metal oxide composite structure; moreover, a synergistic effect and hollow geometric construction advantages of the double metal oxides are expected to show excellent performances in supercapacitors, catalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular, the invention relates to a preparation method of carbon nanotube-loaded double metal oxide hollow nanoparticles. Background technique [0002] Nano- or micro-scale hollow metal oxides have the characteristics of low density, high specific surface area, and hollow structure, so they are widely used in fields related to surface properties, such as gas-phase catalysts, drug sustained-release agents, gas-sensitive materials, photocatalysis, etc. Materials, etc. In addition, it also has potential application value in supercapacitors, lithium-ion batteries, etc. [0003] At present, there are many methods for preparing hollow structure metal oxides. In addition to the template method, phenomena such as Ostwald Ripening and Kirkendall Diffusion can also be used to realize the synthesis of hollow structure nanomaterials. Among them, Kirkendall diffusion uses two species with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01G51/04C01G53/04B82Y40/00B82Y30/00
Inventor 陈国柱马冬玲
Owner UNIV OF JINAN
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