A method for preparing nanoscale barium molybdate particles

A technology of nano-barium molybdate and barium molybdate, which is applied in nanotechnology, nano-optics, nanotechnology, etc., can solve the problems that the particle size of nano-barium molybdate cannot be controlled, and achieves the advantages of simple preparation method and low preparation cost Effect

Inactive Publication Date: 2021-10-01
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor finds that existing W / O microemulsion method cannot control the particle size of the nano barium molybdate that generates

Method used

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  • A method for preparing nanoscale barium molybdate particles
  • A method for preparing nanoscale barium molybdate particles
  • A method for preparing nanoscale barium molybdate particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Construction of diethyl malonate / ethanol / water surfactant-free microemulsion system:

[0046] In a dry and clean test tube, weigh the mass ratios of diethyl malonate and water to be 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7 , 2:8, and 1:9 binary mixtures totaling 1.0g, then place the test tube in a constant temperature water bath to maintain a constant temperature, and the temperature of the water bath is maintained at 25±0.2°C. Under magnetic stirring, drop ethanol into the mixed solution in the test tube, at this time, the mixed solution gradually changed from turbid to clear. Record the mass of ethanol added during clarification. This operation was repeated three times, and the average value of ethanol mass was taken for graphing. The mass of ethanol added in each test tube is: 0.1811g, 0.283g, 0.3396g, 0.3679g, 0.4104g, 0.4245g, 0.4104g, 0.4273g and 0.3651g. Draw a ternary phase diagram, such as figure 1 shown.

[0047] The division of microemulsion systems with differ...

Embodiment 2

[0050] 50nm BaMoO 4 Preparation method of nanoparticles:

[0051] (1) Prepare 0.025mol / L Na 2 MoO 4 Aqueous solution, weigh 7.0g ethanol and 9.2g diethyl malonate with an analytical balance and mix them, and gradually add 3g Na 2 MoO 4 aqueous solution. Stir at room temperature for 30min to obtain 4 2- W / O microemulsion.

[0052] (2) Prepare 0.025mol / L BaCl 2 Aqueous solution, weigh 7.0g of ethanol and 9.2g of diethyl malonate with an analytical balance and mix, and gradually add 3.0g of BaCl under stirring condition 2 aqueous solution. Stir at room temperature for 30min to obtain 2+ W / O microemulsion.

[0053] (3) the Ba containing obtained in step (2) 2+ The W / O microemulsion was added dropwise to the MoO-containing microemulsion obtained in step (1) under magnetic stirring. 4 2- In the W / O microemulsion, keep the reaction temperature at about 25°C, and magnetically stir for 100 hours to form a milky white mixture. Then all the mixture was centrifuged, washed ...

Embodiment 3

[0055] 100nm BaMoO 4 Preparation method of nanoparticles:

[0056] (1) Prepare 0.025mol / L Na 2 MoO 4 Aqueous solution, weigh 7.0g ethanol and 9.2g diethyl malonate with an analytical balance and mix, and gradually add 3.0g Na 2 MoO 4 aqueous solution. Stir at room temperature for 30min to obtain 4 2- W / O microemulsion.

[0057] (2) Prepare 0.025mol / L BaCl 2 Aqueous solution, weigh 7.0g ethanol and 9.2g diethyl malonate with an analytical balance and mix, gradually add 3g BaCl under stirring condition 2 aqueous solution. Stir at room temperature for 30min to obtain 2+ W / O microemulsion.

[0058] (3) the Ba containing obtained in step (2) 2+ The W / O microemulsion was added dropwise to the MoO-containing microemulsion obtained in step (1) under magnetic stirring. 4 2- In the W / O microemulsion, the reaction temperature was fixed at about 25°C, and magnetic stirring was maintained for 5 minutes to form a milky white mixture; then the mixture was transferred to a polyt...

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Abstract

The invention relates to a method for preparing nanoscale barium molybdate particles. The nanometer barium molybdate is synthesized by a double microemulsion method using W / O microemulsion composed of diethyl malonate / ethanol / water as a template. First construct the diethyl malonate / ethanol / water microemulsion system; then prepare the microemulsions of barium salt and molybdate respectively, and mix the aqueous solution of barium salt with diethyl malonate and ethanol to obtain the W / O of barium salt Microemulsion: Molybdate aqueous solution is mixed with diethyl malonate and ethanol to obtain a W / O microemulsion of molybdate; through the control of reaction conditions, nano-scale barium molybdate particles with different particle sizes are obtained.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing nanoscale barium molybdate particles. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Recently, the preparation of nano-scale molybdates has attracted people's attention. Because of its unique structure and luminous properties, it can be used in phosphors, optical fibers, pigments, ion conductors, etc. Among many molybdate products, BaMoO with scheelite structure 4 , has become an important material in the field of optoelectronics because of its green light-emitting properties and special optoelectronic application prospect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00C09K11/68B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C01G39/00C01P2004/22C01P2004/32C01P2004/62C01P2004/64C09K11/684
Inventor 柴金岭宋苗苗
Owner SHANDONG NORMAL UNIV
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