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Preparation method of cadmium molybdate octahedron with controllable grain size

A technology of cadmium molybdate and octahedron is applied in the field of preparation of inorganic functional materials to achieve the effects of low cost, mild conditions, easy control, and no energy consumption

Inactive Publication Date: 2011-04-13
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the uniform octahedral structure of cadmium molybdate at the nanoscale has not been reported

Method used

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  • Preparation method of cadmium molybdate octahedron with controllable grain size
  • Preparation method of cadmium molybdate octahedron with controllable grain size
  • Preparation method of cadmium molybdate octahedron with controllable grain size

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Experimental program
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Effect test

Embodiment 1

[0025] Preparation contains 0.1mol / LCd 2+ The microemulsion A, wherein the mixed mass content of surfactant alkylphenol polyoxyethylene (10) ether and alcohol is 39%, the mol ratio ω of water and surfactant is 10, and all the other are oil phase content; Make corresponding The content of each component is the same as that of microemulsion A MoO 4 2- microemulsion B. Under the condition of stirring at room temperature, microemulsion A was added dropwise into microemulsion B, and the stirring was continued for 30 minutes after the dropwise addition was completed. After the stirring was stopped, it was sealed, and left to stand at room temperature for 48 hours of aging. Centrifugal separation, washing to obtain molybdic acid spacer octahedral particles with a particle diameter of about 30 nanometers, such as figure 1 .

Embodiment 2

[0027] Preparation contains 0.1mol / LCd 2+ The microemulsion A, wherein the mixed mass content of surfactant alkylphenol polyoxyethylene (10) ether and alcohol is 34%, the mol ratio ω of water and surfactant is 10, and all the other are oil phase content; Make corresponding The content of each component is the same as that of microemulsion A MoO 4 2- microemulsion B. Under the condition of stirring at room temperature, microemulsion A was added dropwise into microemulsion B, and the stirring was continued for 30 minutes after the dropwise addition was completed. After the stirring was stopped, it was sealed, and left to stand at room temperature for 48 hours of aging. Centrifugal separation, washing to obtain particle diameter of about 50 nanometers of molybdic acid every octahedral particles, such as figure 2 shown. Surfactant content changes the size of microemulsion droplets, which in turn affects the particle size of the product.

Embodiment 3

[0029] Preparation contains 0.1mol / LCd 2+ The microemulsion A, wherein the mixed mass content of surfactant alkylphenol polyoxyethylene (10) ether and alcohol is 30%, the mol ratio ω of water and surfactant is 20, and all the other are oil phase content; Make corresponding The content of each component is the same as that of microemulsion A MoO 4 2- microemulsion B. Under the condition of stirring at room temperature, microemulsion A was added dropwise into microemulsion B, and the stirring was continued for 30 minutes after the dropwise addition was completed. After the stirring was stopped, it was sealed, and left to stand at room temperature for 48 hours of aging. Centrifugal separation, washing to obtain molybdic acid octahedral particles with a particle diameter of about 200 nanometers, such as image 3 shown. The increase of water content and the decrease of surfactant content all make the microemulsion droplet enlarge, so as to obtain the particles with large partic...

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Abstract

The invention provides a preparation method of cadmium molybdate octahedrons with controllable grain size. The method comprises the following steps: adopting quaternary microemulsion composed of nonionic surfactant alkyl polyethenoxy (10) ether (OP-10), cyclohexane, n-octanol and water, using sodium molybdate and cadmium nitrate as reactants, mixing the components of inverse microemulsion, violently stirring with a magnetic stirrer to obtain uniform and transparent inverse microemulsion with stable property, then dropwise adding the microemulsion with cadmium nitrate in the microemulsion withsodium molybdate to react, ageing, centrifugalizing and washing the product with acetone, absolute ethanol and secondary water repeatedly to obtain the cadmium molybdate octahedrons having uniform shape, size and height. The invention adopts the technical scheme that the template action of the inverse micell microemulsion is used to prepare barium molybdate octahedrons so as to solve the problem that the grain size of the product is hard to control by using the existing preparation method of cadmium molybdate octahedrons. The method of the invention is characterized by simple production technology, safe production process and difficult agglomeration of the product and can be widely used in the preparation of inorganic functional materials.

Description

technical field [0001] The invention relates to the preparation of an inorganic functional material, in particular to a method for preparing a cadmium molybdate octahedron with a controllable particle size by using an inverse microemulsion system. Background technique [0002] Scheelite-type tetragonal metal molybdate, due to its special photoelectric performance, scintillator performance, humidity sensing performance, etc., makes it a substance that has attracted much attention in the field of inorganic functional materials. Metal molybdate is not only an excellent photoelectric functional material, but also has potential applications in humidity sensors, laser substrates, etc. The unique properties endowed by the novel structure at the nanoscale will enable molybdates to be used in a wider range of fields. In recent years, most of the research has focused on the research of molybdates such as Ca, Sr, and Ba, and the research on CdMoO 4 There are relatively few research r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00
Inventor 黄在银米艳李艳芬姜俊颖
Owner GUANGXI UNIV FOR NATITIES
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