Cobalt molybdate hollow-ball powder material preparation method and cobalt molybdate hollow ball powder material

A technology of powder materials and hollow spheres, which is applied in the field of molybdate, can solve the problems of not having wrapping effect and limiting the excellent performance of cobalt molybdate micro-nano materials, and achieve excellent physical and chemical properties and a wide range of applications

Inactive Publication Date: 2013-12-25
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The morphology of cobalt molybdate micro-nano materials obtained by the above method is mainly non-hollow structures such as nanorods, nanowires, ultrafine particles and films, and none of them have some pe

Method used

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  • Cobalt molybdate hollow-ball powder material preparation method and cobalt molybdate hollow ball powder material

Examples

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Embodiment 1

[0041]Weigh 250g of Angel yeast powder and add it to 15000ml of normal saline, fully stir with a magnetic stirrer at room temperature for 30min, then centrifuge at 3000r / m for 5min, discard the supernatant, disperse and wash with normal saline again, and centrifuge repeatedly. Carry out three times, then stir and dissolve the cleaned yeast with absolute ethanol, centrifuge at 3000r / m for 5min, discard the supernatant, and disperse and activate with absolute ethanol again, repeat this operation twice; Mix with deionized water, and add 1.25mol cobalt chloride hexahydrate to the mixture, so that the concentration of cobalt chloride hexahydrate is 0.083mol / L, stir at 50°C for 3 hours, so that the yeast cells can fully absorb cobalt ions; Then slowly add 1.25mol sodium molybdate dihydrate and deionized water to the system, adjust the concentration of sodium molybdate dihydrate in the system to 0.083mol / L, stir the above solution at 35°C with a magnetic stirrer until a large amount o...

Embodiment 2

[0043] Weigh 500g of Angel Yeast Powder and add it into 30000ml of deionized water, fully stir with a magnetic stirrer at room temperature for 30min, then centrifuge at 3000r / m for 5min, discard the supernatant, disperse and wash with deionized water again, and then centrifuge. Repeat three times, then stir and dissolve the cleaned yeast with absolute ethanol, centrifuge at 3000r / m for 5min, discard the supernatant, disperse and activate with absolute ethanol again, repeat this operation twice; Mix the precipitate with deionized water, and add 2.5mol cobalt chloride hexahydrate to the mixture to make the concentration of cobalt chloride hexahydrate 0.083mol / L, stir at 50°C for 3 hours, so that the yeast cells can fully absorb cobalt ions ; Then slowly add 2.5mol sodium molybdate dihydrate and deionized water to the system, adjust the concentration of sodium molybdate dihydrate in the system to 0.083mol / L, stir the above solution at 40°C with a magnetic stirrer until a large amo...

Embodiment 3

[0045] Weigh 450g of Angel yeast powder and add it to 9000ml of normal saline, fully stir with a magnetic stirrer at room temperature for 30min, then centrifuge at 3000r / m for 5min, discard the supernatant, disperse and wash with normal saline again, and centrifuge repeatedly. Carry out three times, then stir and dissolve the cleaned yeast with absolute ethanol, centrifuge at 3000r / m for 5min, discard the supernatant, and disperse and activate with absolute ethanol again, repeat this operation twice; Mix with deionized water, and add 0.75mol cobalt chloride hexahydrate to the mixture, so that the concentration of cobalt chloride hexahydrate is 0.083mol / L, stir at 55°C for 2 hours, so that the yeast cells can fully absorb cobalt ions; Then slowly add 0.75mol sodium molybdate dihydrate and deionized water to the system, adjust the concentration of sodium molybdate dihydrate in the system to 0.083mol / L, stir the above solution at 45°C with a magnetic stirrer until a large amount o...

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Abstract

The invention relates to the field of molybdate and provides a preparation method of a cobalt molybdate powder material adopting a hollow ball structure. The preparation method comprises the following steps: using a dispersant to repeatedly wash yeast powder, and then using an activating agent to reactivate the yeast powder to obtain yeast cells; adding cobalt chloride hexahydrate and stirring for 2-4 h at the temeprature of 40-60 DEG C to enable the yeast cells to fully adsorb cobalt ions, and then adding sodium molybdate dihydrate, stirring at the constant temperature of 35-50 DEG C to obtain a purple sediment; seasoning the solution for 6-14 h at the temperature of 20-30 DEG C, centrifugally separating and drying the purple sediment; calcining the dried powder, and cooling to the room temperature to obtain cobalt molybdate micrometer-sized hollow balls. The hollow-ball powder has the average size of (2.0-4.5)*(1.5-4.0) mum, are about 100-400 nm in wall thickness, and is provided with a hollow part to accommodate a great amount of guest molecules to produce the wrapping effect, thereby achieving excellent physicochemical performance and wide application range.

Description

technical field [0001] The invention relates to the field of molybdates, in particular to a method for preparing a cobalt molybdate hollow sphere powder material and the cobalt molybdate hollow sphere powder material. Background technique [0002] At present, the industry has obtained cobalt molybdate micro-nano materials of different dimensions and sizes through a variety of preparation methods. These methods include: solid-phase method mixing solid precursors and calcining at high temperature to prepare cobalt molybdate powder materials; Cobalt molybdate nanorods with a diameter of 10-80 nm and a length of tens of nm to 1 μm were synthesized by liquid phase aging at room temperature; cobalt molybdate nanorods with a diameter of about 100 nm and a length of 1 to 5 μm were prepared by a hydrothermal method; Cobalt molybdate film materials were prepared by solution method; cobalt molybdate nanowires were prepared by chemical co-precipitation method; cobalt molybdate ultrafine...

Claims

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Application Information

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IPC IPC(8): C01G51/00
Inventor 杨莉
Owner CHANGAN UNIV
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