Preparation method of cobalt molybdate microcrystals

A technology of cobalt molybdate and microcrystals, applied in chemical instruments and methods, cobalt compounds, inorganic chemistry, etc., can solve the problems of uncontrollable microscopic appearance, high impurity content of products, high reaction equipment conditions, etc., and meet the requirements and products High yield and good dispersibility

Inactive Publication Date: 2014-01-29
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods require high reaction equipment conditions, complex preparation methods, high product impurity content, and uncontrollable microscopic appearance.

Method used

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  • Preparation method of cobalt molybdate microcrystals
  • Preparation method of cobalt molybdate microcrystals
  • Preparation method of cobalt molybdate microcrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Slowly add the 0.1 mol / L cobalt nitrate solution dropwise to the 0.1 mol / L sodium molybdate solution at room temperature. The amount of the mixed solution added is based on the molar ratio of cobalt nitrate / sodium molybdate = 1:1, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 200° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the product obtained by the reaction, put it in an oven, and dry it for 15 hours at 150 °C to obtain a cobalt molybdate microcrystalline product, which has the shape of a micron rod. The diameter is between 1 and 5 μm, and the length is between 50 and 100 μm.

Embodiment 2

[0028] Slowly add the 0.2 mol / L cobalt nitrate solution dropwise to the 0.2 mol / L sodium molybdate solution at room temperature. The amount of the mixed solution added is based on the molar ratio of cobalt nitrate / sodium molybdate = 1:1, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 200° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the product obtained by the reaction, put it in an oven, and dry it for 15 hours at 180 °C to obtain a microcrystalline product of cobalt molybdate, which has the shape of a micron rod. The diameter is between 1 and 3 μm, and the length is between 50 and 90 μm.

Embodiment 3

[0030] Slowly add the 0.1 mol / L cobalt acetate solution dropwise to the 0.1 mol / L sodium molybdate solution at room temperature. The amount of the mixed solution added is based on the molar ratio of cobalt acetate / sodium molybdate = 1:1, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 180° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the product obtained by the reaction, put it in an oven, and dry it for 15 hours at 180 °C to obtain a microcrystalline product of cobalt molybdate, which has the shape of a micron rod. The diameter is between 1 and 3 μm, and the length is between 50 and 80 μm.

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Abstract

The invention belongs to the field of preparing inorganic nonmetal materials, and particularly relates to a preparation method of cobalt molybdate microcrystals. The preparation method comprises the steps of by taking soluble cobalt salt and molybdate as active ingredients, mixing according to certain mole ratio, stirring and reacting at the temperature of 20-50 DEG C for 5-30 minutes, then performing hydrothermal reaction at the temperature of 100-300 DEG C for 6-48 hours; after the hydrothermal reaction is finished, naturally cooling to room temperature, filtering, washing and drying to obtain cobalt molybdate microcrystals. The preparation method is simple and convenient and easy in technology, the cobalt molybdate microcrystals are high in purity, low in impurity content, good in dispersity, low in cost, the diameters of the cobalt molybdate microcrystals range from 1mu m to 5mu m, and the lengths of the cobalt molybdate microcrystals range from 50mum to 100mum. The prepared cobalt molybdate microcrystals are unique in microstructure, regular in sizes, and high in crystallization degree, and can be widely applied in the electronic and electoral, mechanical, chemical, photoelectrical, energy storage and converting, photocatalytic and other fields.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of cobalt molybdate microcrystals. Background technique [0002] Cobalt molybdate (CoMoO 4 ) is an important inorganic salt product and one of the important members of metal molybdates. It has good electrochemical stability and high catalytic activity, so it is widely used in chemical industry, electronic industry, energy storage and Transformation and other application fields. The traditional preparation method of cobalt molybdate is prepared by solid-state reaction of cobalt oxide and molybdenum oxide under high temperature and high pressure. Alternatively, the precursor of cobalt molybdate is first prepared by precipitation method, and then the cobalt molybdate product is prepared by high-temperature calcination. The above methods require high reaction equipment conditions, complex preparation methods, high prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00
Inventor 张杰许家胜
Owner BOHAI UNIV
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