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A kind of preparation method of porous tricobalt tetraoxide nanobelt

A technology of cobalt trioxide nanometer and cobalt salt, which is applied in the direction of cobalt oxide/cobalt hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of high synthesis cost and difficulty in large-scale production, and achieve low price, easy large-scale synthesis, Environmentally friendly effect

Inactive Publication Date: 2015-10-28
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As can be seen from the above literature, the solvents used in the synthesis of cobalt trioxide nanobelts contain a large amount of organic solvents, and surfactants are also used. The disadvantages are that the synthesis cost is high and it is not easy to produce on a large scale.

Method used

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  • A kind of preparation method of porous tricobalt tetraoxide nanobelt
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  • A kind of preparation method of porous tricobalt tetraoxide nanobelt

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Embodiment 1

[0025] (1) First dissolve cobalt nitrate and dicyandiamide in water to form a mixed solution, the concentration of cobalt nitrate is 50mmol / l, and the molar ratio of cobalt nitrate and dicyandiamide is 1:4;

[0026] (2) Then put the mixed solution into a hydrothermal kettle, and conduct a hydrothermal reaction at 180°C, and the reaction time is 12h;

[0027] (3) After the hydrothermal reaction, the reaction product was separated and washed, and then the reaction product was calcined at 500°C for 2 hours to obtain porous cobalt trioxide nanobelts.

[0028] The black powder product prepared above was subjected to XRD test on the X'PertPROMPD multifunctional X-ray diffractometer produced by Panalytical Company (Panalytical) in the Netherlands. figure 1 It is the XRD spectrum of the black powder product obtained in Example 1. The diffraction peak in the spectrum is a typical spinel structure cobalt tetroxide characteristic diffraction peak. According to the standard powder diffrac...

Embodiment 2

[0033] (1) First dissolve cobalt nitrate and dicyandiamide in water to form a mixed solution, the concentration of cobalt nitrate is 10mmol / l, and the molar ratio of cobalt nitrate and dicyandiamide is 1:1;

[0034] (2) Then put the mixed solution into a hydrothermal kettle, and conduct a hydrothermal reaction at 130°C, and the reaction time is 20h;

[0035] (3) After the hydrothermal reaction is finished, the reaction product is separated and washed, and then the reaction product is calcined at 400° C. for 10 h to obtain porous cobalt trioxide nanobelts.

[0036] XRD spectrum analysis product is cubic cobalt tetroxide. SEM photos show that the morphology of cobalt tetroxide presents a porous band structure with a width of 150nm-200nm. The TEM photos show that the cobalt trioxide nanoribbon has a size of about 200nm, is formed by the assembly of nanoparticles with a size of 30nm-50nm, and has a pore diameter of about 25nm. The specific surface area measured by nitrogen adsor...

Embodiment 3

[0038] (1) First dissolve cobalt nitrate and dicyandiamide in water to form a mixed solution, the concentration of cobalt nitrate is 150mmol / l, and the molar ratio of cobalt nitrate and dicyandiamide is 1:7;

[0039] (2) Then put the mixed solution into a hydrothermal kettle, and conduct a hydrothermal reaction at 200°C, and the reaction time is 8h;

[0040] (3) After the hydrothermal reaction, the reaction product was separated and washed, and then the reaction product was calcined at 700°C for 1 hour to obtain porous cobalt trioxide nanobelts.

[0041] XRD spectrum analysis product is cubic cobalt tetroxide. SEM photos show that the morphology of cobalt tetroxide presents a porous band structure with a width of 100nm-500nm. The TEM photos show that the cobalt trioxide nanoribbon has a size of about 250nm, is formed by assembling nanoparticles with a size of 40nm-60nm, and has a pore diameter of about 25nm. The specific surface area measured by nitrogen adsorption instrumen...

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Abstract

The invention belongs to the technical field of synthesis of inorganic nano materials and discloses a preparation method of a porous cobaltosic oxide nanobelt. The preparation method of the porous cobaltosic oxide nanobelt comprises the following steps: (1) firstly dissolving cobalt salt and a precipitator into water, so that a mixed solution is formed; (2) placing the mixed solution into a hydrothermal kettle, carrying out a hydrothermal reaction for 5-24 hours at the temperature of 100-250 DEG C; (3) after the hydrothermal reaction is finished, separating and washing reaction products, and then roasting the reaction products at the temperature of 350-800 DEG C, so that the porous cobaltosic oxide nanobelt is obtained. According to the preparation method of the porous cobaltosic oxide nanobelt, no surfactant or organic solvent is adopted in a synthetic process, and a new synthetic method is provided for a multilevel structure copper oxide material; a preparation technology is simple, the whole technological process is carried out in a reaction kettle, no complex equipment is needed, and the preparation method of the porous cobaltosic oxide nanobelt is simple, efficient, low in cost, environmentally friendly and easy for large-scale synthesis.

Description

technical field [0001] The invention relates to the technical field of synthesis of inorganic nanomaterials, in particular to a preparation method of a porous cobalt trioxide nanobelt. Background technique [0002] As a type of p-type transition metal oxide, cobalt tetroxide exhibits unique physical and chemical properties in the fields of electricity, magnetism, gas sensing, and catalysis, and is widely used in important fields such as lithium-ion battery electrode materials, magnetic materials, and heterogeneous catalysts. . The physical and chemical properties of cobalt tetroxide are affected by the morphology, size and structure. In recent years, cobalt tetroxide materials with different morphological structures have aroused great interest, and cobalt tetroxide nanowires, nanorods, nanosheets, nanotubes, nanobelts, nanoflowers, nanospheres, etc. have been synthesized. Among them, nanobelts have high active sites due to their unique structural characteristics, namely hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04B82Y30/00B82Y40/00
Inventor 刘爱凤车红卫
Owner HEBEI UNIV OF ENG
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