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Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure

A molybdenum trioxide, three-dimensional technology, which is applied in the field of preparation of three-dimensional hierarchical flower spherical molybdenum trioxide microspheres, can solve the problems of no three-dimensional hierarchical structure flower spherical molybdenum trioxide microspheres preparation method, low purity, complicated process, etc. , to achieve the effect of short hydrothermal reaction time, simple equipment and large specific surface area

Inactive Publication Date: 2015-06-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation method is complicated in technology, low in efficiency and low in purity, and there is no relevant report on the preparation method of flower spherical molybdenum trioxide microspheres with three-dimensional hierarchical structure

Method used

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  • Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure
  • Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure
  • Preparation method of molybdenum trioxide microsphere in three-dimensional hierarchical structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh a certain amount of sodium molybdate and thiourea, and dissolve them in deionized water, wherein the concentration of sodium molybdate is 0.03 moles / liter, the concentration of thiourea is 0.112 moles / liter, and the moles of sodium molybdate and thiourea The ratio is 4:15;

[0025] (2) Add citric acid as an additive to the mixed solution obtained in step (1), wherein the molar ratio of citric acid to sodium molybdate is 1, stir magnetically at room temperature, and mix well;

[0026] (3) Move the mixed solution obtained in step (2) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, and conduct a hydrothermal reaction at a temperature of 200°C for 21 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0027] (4) Place the solid product obtained in step (3) in a drying oven, dry at 60°C for...

Embodiment 2

[0030] (1) Weigh a certain amount of sodium molybdate and thiourea, dissolve them in deionized water, wherein the concentration of sodium molybdate is 0.04 mol / L, the concentration of thiourea is 0.15 mol / L, and the molar concentration of sodium molybdate and thiourea The ratio is 4:15;

[0031] (2) Add citric acid as an additive to the mixed solution obtained in step (1), wherein the molar ratio of citric acid to sodium molybdate is 1, stir magnetically at room temperature, and mix well;

[0032] (3) Move the mixed solution obtained in step (2) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 200°C for 22 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0033] (4) Place the solid product obtained in step (3) in a drying oven, dry at 60°C for 24 hours, then put it in ...

Embodiment 3

[0035] (1) Weigh a certain amount of sodium molybdate and thiourea, and dissolve them in deionized water, wherein the concentration of sodium molybdate is 0.02 mole / liter, the concentration of thiourea is 0.075 mole / liter, and the molar concentration of sodium molybdate and thiourea The ratio is 4:15;

[0036] (2) Add citric acid as an additive to the mixed solution obtained in step (1), wherein the molar ratio of citric acid to sodium molybdate is 1, stir magnetically at room temperature, and mix well;

[0037] (3) Move the mixed solution obtained in step (2) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at a temperature of 190°C for 24 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0038] (4) Place the solid product obtained in step (3) in a drying oven, dry at ...

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Abstract

The invention provides a preparation method of a ball-flower-shaped molybdenum trioxide microsphere in a three-dimensional hierarchical structure and belongs to the technical field of preparation technologies of advanced inorganic nanomaterials. The preparation method particularly comprises the steps of adding citric acid at a certain mole ratio into a sodium molybdate and thiourea mixed solution with a certain concentration, intensively mixing, sealing a mixed solution in an autoclave, carrying out hydrothermal reaction for a certain time at specific temperature, washing, drying, and roasting in a muffle furnace in air to form the ball-flower-shaped molybdenum trioxide microsphere in the three-dimensional hierarchical structure. The method is low in cost, simple in production technology, high in productivity, free from environmental pollution and easy for industrial mass production. The ball-flower-shaped molybdenum oxide microsphere in the three-dimensional structure is regular in morphology, and can be used for the field of chemical catalysis, photocatalysts, gas sensors and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of advanced inorganic nanometer materials, and in particular relates to a preparation method of spherical molybdenum trioxide microspheres with a three-dimensional hierarchical structure. Background technique [0002] Molybdenum trioxide (MoO 3 ) is an indispensable intermediate compound for the production of molybdenum metal, and is the main raw material for the production of molybdenum powder, molybdenum compound and molybdenum-based products. MoO 3 by [MoO 6 ] The octahedron is the basic structural unit, sharing corners and forming chain connections, and every two similar chains share edges to form a layered MoO 3 Stoichiometric structure, the layers are connected by van der Waals force. Due to its special structure, it has photochromic, electrochromic, photocatalytic and gas-sensitive properties. With the development of science and technology, the traditional molybdenum trio...

Claims

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Application Information

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IPC IPC(8): C01G39/02B82Y30/00
Inventor 闫慧慧陈春丽宋鹏王琦杨中喜
Owner UNIV OF JINAN
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