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Preparation method of cobaltosic oxide/stannic oxide composite nanomaterial

A composite nanomaterial, cobalt tetroxide technology, applied in the directions of cobalt oxide/cobalt hydroxide, tin oxide, nanotechnology, etc., can solve the problems of instability, wide particle size distribution, low conductivity, etc., and achieve easy operation control and low preparation cost. , the effect of high production efficiency

Inactive Publication Date: 2016-09-07
BOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cobalt tetroxide prepared by most methods is single crystal, with wide particle size distribution and instability, which is mainly related to the control conditions of the precipitation process and calcination process.
The general precipitation reaction conditions are likely to cause the local concentration of the reaction material solution to be too high, or the calcination temperature is too high or too low, which will lead to irregular morphology or single crystal, uneven particle size distribution, etc.
[0003] The theoretical specific capacitance value of tricobalt tetroxide is high, but the conductivity of tricobalt tetroxide itself is very low, even as an electrode material, its electron transmission efficiency is not high

Method used

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  • Preparation method of cobaltosic oxide/stannic oxide composite nanomaterial
  • Preparation method of cobaltosic oxide/stannic oxide composite nanomaterial
  • Preparation method of cobaltosic oxide/stannic oxide composite nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0030] Under the conditions of a constant temperature of 30 °C and a stirring speed of 100 rpm, the methanol solution of the mixture of cobalt chloride and stannous chloride was added dropwise to the aqueous oxalic acid solution. The molar concentration of stannous chloride methanol solution is 0.5 mol / L, and the molar ratio of cobalt chloride, stannous chloride and oxalic acid is 1:0.5:10 in turn. The molar concentration of oxalic acid is 0.5 mol / L. . The speed of dripping cobalt chloride and stannous chloride methanol solution is 60 drops / min, and the stirring reaction time is 30 minutes. After the reaction finishes, filter and wash with water and dry. The drying time is 3 hours, and the drying temperature is 80 ° C. The rate is 10 °C / min. Calcination was then carried out in a muffle furnace at a calcination temperature of 500 °C, a calcination time of 5 h, and a heating rate of 10 °C / min. After natural cooling, the target product is obtained.

[0031] The product is a u...

Embodiment 2

[0033] Under the conditions of a constant temperature of 30 °C and a stirring speed of 100 rpm, the methanol solution of the mixture of cobalt chloride and stannous chloride was added dropwise to the aqueous oxalic acid solution. The molar concentration of stannous chloride methanol solution is 0.5 mol / L, and the molar ratio of cobalt chloride, stannous chloride and oxalic acid is 1:0.2:10 in sequence. The molar concentration of oxalic acid is 0.5 mol / L. . The speed of dropping cobalt chloride and tin protochloride methanol solution is 60 drops / min, and the reaction time is 30 minutes. After the reaction is finished, filter and wash with water and dry. The drying time is 3 hours, and the drying temperature is 80°C. at 10 °C / min. Calcination was then carried out in a muffle furnace at a calcination temperature of 500 °C, a calcination time of 5 h, and a heating rate of 10 °C / min. After natural cooling, the target product is obtained.

[0034] The product is a uniform distri...

Embodiment 3

[0036]Under the conditions of a constant temperature of 20 °C and a stirring speed of 150 rpm, the methanol solution of the mixture of cobalt chloride and stannous chloride was added dropwise to the aqueous oxalic acid solution. The molar concentration of stannous chloride methanol solution is 0.5 mol / L, and the molar ratio of cobalt chloride, stannous chloride and oxalic acid is 1:0.1:20 in turn. The molar concentration of oxalic acid is 0.5 mol / L. The speed of dropping cobalt chloride and tin protochloride methanol solution is 60 drops / min, and the reaction time is 30 minutes. After the reaction is finished, filter and wash with water and dry. The drying time is 3 hours, and the drying temperature is 80°C. at 10 °C / min. Calcination was then carried out in a muffle furnace at a calcination temperature of 800 °C, a calcination time of 5 h, and a heating rate of 10 °C / min. After natural cooling, the target product is obtained.

[0037] The product is a uniform distribution o...

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Abstract

The invention belongs to the technical field of functional material preparation, and relates to a preparation method of a cobaltosic oxide / stannic oxide composite nanomaterial. The method comprises the following steps: dropwise adding a methanol solution of a cobalt chloride and stannous chloride mixture to an oxalic acid aqueous solution and reacting at a constant temperature under a stirring condition until a precursor sediment is generated; filtering, washing and drying the precursor sediment, and then carrying out thermal treatment in a muffle furnace to obtain the cobaltosic oxide / stannic oxide composite nanomaterial. The technology is simple, convenient and easy to do; the purity is high; the purity content is low; the preparation cost of the product is low; the performance is excellent; and industrial mass production can be achieved. The cobaltosic oxide / stannic oxide composite nanomaterial prepared by the method has relatively good conductivity, has relatively high specific capacitance and good cycle performance as an electrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method of tricobalt tetroxide / tin dioxide composite nanomaterial. Background technique [0002] Cobalt tetroxide (Co 3 o 4 ) is widely used as an inorganic functional material, and is mainly used in the electrode material of lithium-ion battery cathode material supercapacitor in the field of green energy. At present, there are many methods for producing cobalt tetroxide at home and abroad, including thermal decomposition, chemical precipitation, high temperature oxidation, electrochemical oxidation, hydrothermal method, solvothermal method, etc. The morphology and structure of nanometer-sized cobalt tetroxide materials determine its physical and chemical properties, and its particle size and morphology have a great influence on its performance. At present, cobalt tetroxide prepared by most methods is single crystal, with wi...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/1391H01G11/46H01G11/86C01G51/04C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/02C01G51/04H01G11/46H01G11/86H01M4/1391H01M4/48Y02E60/10
Inventor 张杰许家胜
Owner BOHAI UNIV
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