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Method for synthesizing metal molybdate micron/nano materials by adopting microwave radiation method

A microwave radiation method and nanomaterial technology, which is applied in the field of preparation of functional catalytic materials, can solve problems such as difficulty in structure control, and achieve the effects of wide application range, regular morphology and uniform size

Inactive Publication Date: 2013-04-03
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, there are still some difficulties in controlling the structure of metal molybdate sheet-like micro-nano materials by existing synthesis methods; especially, there are few literature reports on the effective control of alkaline earth metal or rare earth metal molybdate materials by surfactant-assisted microwave method. The intrinsic relationship between the structure and performance on the two-dimensional scale, so as to maximize the positive effect of the effective crystal plane of the sheet structure in different dimensional spaces, aiming to improve the catalytic conversion effect in the application field

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  • Method for synthesizing metal molybdate micron/nano materials by adopting microwave radiation method
  • Method for synthesizing metal molybdate micron/nano materials by adopting microwave radiation method
  • Method for synthesizing metal molybdate micron/nano materials by adopting microwave radiation method

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Embodiment 1

[0029] At room temperature of 25°C, prepare the molar concentration of calcium nitrate aqueous solution to be 0.100mol / L, and then add 0.050mol / L ethylenediaminetetraacetic acid to the solution to make the molar concentration of calcium nitrate and surfactant ethylenediaminetetraacetic acid The ratio is 10:5, stir vigorously for 5 minutes; weigh the ammonium molybdate solid with the molar number equal to the metal cation, add distilled water until it dissolves completely, and obtain a uniform transparent clear solution; then add it dropwise to the metal salt solution, and stir vigorously 5 minutes; the obtained solution is transferred to a glass round bottom flask, and reacted in a microwave irradiation reactor, and the reaction time is 30 minutes, and the ultrafine powder material can be prepared. The ultrafine powder was analyzed by XRD phase ( figure 1 ) indicates that it is CaMoO 4 Pure phase, the corresponding JCPDS card number is 7-212, the space group is I41 / a (No.88),...

Embodiment 2

[0031] At room temperature of 25°C, prepare the molar concentration of calcium nitrate aqueous solution to be 1.000mol / L, and then add 0.100mol / L ethylenediaminetetraacetic acid to the solution to make the molar concentration of calcium nitrate and surfactant ethylenediaminetetraacetic acid The ratio is 10:1, stir vigorously for 5 minutes; weigh the ammonium molybdate solid with the molar number equal to the metal cation, add distilled water until it dissolves completely, and obtain a uniform transparent and clear solution; then add it dropwise to the metal salt solution, and stir vigorously 5 minutes; the obtained solution was transferred to a glass round-bottomed flask, and reacted in a microwave irradiation reactor for 30 minutes to prepare a pure-phase calcium molybdate material. The product was scanned by SEM ( image 3 ) shows that the main morphology of the product is nanorods, wherein a small amount of calcium molybdate nanosheets are 500-800 nanometers in diameter and...

Embodiment 3

[0033] At room temperature of 25°C, configure the molar concentration of strontium nitrate aqueous solution to be 0.015mol / L, and then add 0.0015mol / L ethylenediaminetetraacetic acid to the solution to make the molar concentration of calcium nitrate and surfactant ethylenediaminetetraacetic acid The ratio is 10:1, stir vigorously for 5 minutes; weigh the ammonium molybdate solid with the molar number equal to the metal cation, add distilled water until it dissolves completely, and obtain a uniform transparent and clear solution; then add it dropwise to the metal salt solution, and stir vigorously 5 minutes; the obtained solution was transferred to a glass round-bottomed flask, and reacted in a microwave irradiation reactor for 30 minutes to prepare a pure-phase strontium molybdate material. The product was scanned by SEM ( Figure 4 ) shows that it is a nano-sheet structure, the diameter of the sheet-like material is several microns, the thickness of the sheet is 50-80 nm, and...

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Abstract

The invention provides a method for synthesizing metal molybdate micron / nano materials by adopting a microwave radiation method. The method is characterized by taking alkaline-earth metal salts or rare-earth metal salts, ammonium molybdate and a surfactant ethylene diamine tetraacetic acid as raw materials and distilled water as a solvent, and adopting the surfactant-assisted microwave radiation method to prepare the molybdate micron / nano materials. The method has the following advantages: by adopting the surfactant-assisted microwave radiation method to prepare the metal molybdate micron / nano materials, the prepared materials have uniform sizes and regular topography, and effective control on the microstructures of the products can be realized by controlling the conditions of the microwave radiation process; the method has the advantages of mild reaction conditions, simple equipment, high process controllability, high yield and the like; and the metal molybdate micron / nano materials can be widely applied to the fields such as energy storage and conversion, gas sensing, photoluminescence, laser illuminators and the like.

Description

technical field [0001] The invention relates to the preparation technology of functional catalytic materials, in particular to a method for synthesizing metal molybdate micro / nano materials by using a microwave radiation method. technical background [0002] Metal molybdate has good catalytic performance due to its unique crystal structure, making metal molybdate a key material in the fields of energy storage and conversion, gas sensing, and photoluminescence; it will also be used in other fields It has potential application value and bright market prospect. [0003] Metal molybdate micro / nano materials combine the crystal structure characteristics of bulk materials and the advantages of micro / nano materials, and are bound to endow traditional bulk materials with new vitality. Conversion efficiency. [0004] The existing methods for preparing such metal molybdates mainly include high-temperature solid-state reaction method, hydrothermal method, direct precipitation method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00B01J19/12B01J13/02
Inventor 孙嬿李春生马雪刚王莉娜张志佳宋明阳
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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