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Preparation method of carbon nano-tube loaded nano-cobalt catalyst

A carbon nanotube and nano-cobalt technology, which is applied in the field of cobalt catalyst preparation, can solve the problems of unfavorable large-scale production and application of carbon nanotube-loaded nano-cobalt catalysts, the inability to form mass production, and harsh production conditions. Modern production and application, low cost of raw materials, good consistency

Active Publication Date: 2014-05-28
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical impregnation method, electrochemical deposition method, chemical vapor deposition method, microemulsion method, colloidal method, etc. are currently several common methods for preparing carbon nanotube-supported nano-cobalt catalysts, but these methods have high raw material costs, harsh production conditions, Disadvantages such as complex process, few controllable factors, and inability to form mass production are not conducive to the large-scale production and application of carbon nanotube-supported nano-cobalt catalysts

Method used

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  • Preparation method of carbon nano-tube loaded nano-cobalt catalyst
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  • Preparation method of carbon nano-tube loaded nano-cobalt catalyst

Examples

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Embodiment 1

[0019] A preparation method of carbon nanotube supported nano-cobalt catalyst, comprising the following steps:

[0020] 1) Dissolve 4 mmol of cobalt nitrate hexahydrate in 40 mL of DMF, then add 4 mmol of trimesic acid and 2 mmol of 4,4'-bipyridine to obtain a mixture;

[0021] 2) Transfer the above mixed solution to an autoclave, and carry out heating and constant temperature reaction. The reaction temperature is 80°C, and the reaction time is 72h. After cooling to room temperature naturally, the resulting crystal or powder is washed three times with DMF. Drying at -0.1Mpa for 12 hours to produce Co-MOF, a metal-organic framework product of cobalt;

[0022] 3) The above metal-organic framework product Co-MOF was calcined in a tube furnace at a calcination temperature of 600 °C, a calcination time of 140 min, and an argon atmosphere to prepare a carbon nanotube-supported nano-cobalt catalyst.

[0023] The composition of the carbon nanotube-supported nano-cobalt prepared in th...

Embodiment 2

[0025] A preparation method of carbon nanotube supported nano-cobalt catalyst, comprising the following steps:

[0026] 1) Dissolve 4 mmol of cobalt nitrate hexahydrate in 40 mL of DMF, then add 4 mmol of trimesic acid and 2 mmol of 4,4'-bipyridine to obtain a mixture;

[0027] 2) Transfer the above mixed solution to an autoclave, and carry out heating and constant temperature reaction. The reaction temperature is 100°C, and the reaction time is 36h. After cooling to room temperature naturally, the resulting crystal or powder is washed three times with DMF. Drying at -0.1Mpa for 12 hours to produce Co-MOF, a metal-organic framework product of cobalt;

[0028] 3) The above metal-organic framework product Co-MOF was calcined in a tube furnace at a calcination temperature of 700 °C, a calcination time of 140 min, and an argon atmosphere to prepare a carbon nanotube-supported nano-cobalt catalyst.

[0029] The scanning electron microscope (SEM) and transmission electron microscop...

Embodiment 3

[0031] A preparation method of carbon nanotube supported nano-cobalt catalyst, comprising the following steps:

[0032] 1) Dissolve 5mmol cobalt chloride hexahydrate in 30mL absolute ethanol, then add 5mmol urea to obtain a mixed solution;

[0033] 2) Transfer the above mixed solution to an autoclave, and carry out heating and constant temperature reaction. The reaction temperature is 150°C, and the reaction time is 16h. After cooling to room temperature naturally, the crystal or powder formed is washed three times with DMF, and the vacuum degree is Drying at -0.1Mpa for 10 hours to produce Co-MOF, a metal-organic framework product of cobalt;

[0034] 3) The above metal-organic framework product Co-MOF was calcined in a tube furnace at a calcination temperature of 500 °C, a calcination time of 140 min, and an argon atmosphere to prepare a carbon nanotube-supported nano-cobalt catalyst.

[0035] image 3 The transmission electron microscope image (TEM) of the nano-cobalt supp...

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Abstract

The invention discloses a preparation method of a carbon nano-tube loaded nano-cobalt catalyst. The method comprises the following steps: (1) dissolving a cobalt salt in an organic solvent and then adding a ligand to obtain a mixed liquid; (2) transferring the mixed liquid to a high-pressure kettle, performing a thermostatic heating reaction, naturally cooling to room temperature and then orderly performing filtration, washing and vacuum drying treatment on the generated crystal or powder to obtain a metal organic skeleton product Co-MOF of cobalt; and (3) roasting the metal organic skeleton product Co-MOF for 100-180 minutes at a roasting temperature of 400 DEG C to 1000 DEG C in a calcination atmosphere of argon inside a tubular furnace so as to obtain the carbon nano-tube loaded nano-cobalt catalyst. The preparation method disclosed by the invention has the advantages that the raw materials are low in cost, the production process is also simple, the reaction condition is easy to control, no template agent and surfactant are needed, the prepared product is good in consistency and environment-friendly; and the preparation method is beneficial to batch production and application of carbon nano-tube loaded nano-cobalt.

Description

technical field [0001] The invention relates to the preparation of a cobalt catalyst, in particular to a preparation method of a carbon nanotube supported nano cobalt catalyst. Background technique [0002] Nano-cobalt has the characteristics of small size, large specific surface area, and many surface active sites, and can be used as catalysts, magnetic materials, wave-absorbing materials, batteries, hard alloys, etc. The catalytic performance of cobalt nanoparticles is closely related to its particle size, loading capacity, dispersion and surface area. People usually improve the catalytic performance by reducing the particle size of cobalt particles and dispersing metal cobalt particles on carbon supports. Carbon nanotubes have graphite-like tube walls, nanoscale pores, quantum size effects, large specific surface area, and good thermal and electrical properties, and are considered to be a good catalyst carrier and wave-absorbing material. Carbon nanotube-supported nano-...

Claims

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Application Information

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IPC IPC(8): B01J23/75
Inventor 陶占良周丽敏程方益梁静陈军
Owner NANKAI UNIV
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