Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing molybdate nanocrystalline

A technology of molybdate and nanocrystals, which is applied in the field of preparation of molybdate nanostructures, can solve the problems of expensive precursor method, difficult process control, and low yield, and achieve low synthesis process cost, convenient operation, and simple experimental process Effect

Inactive Publication Date: 2009-03-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF0 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods are applied to large-scale production and there will be insoluble problems, such as complex precursor method needs expensive organic solvent, and the cost is higher (F.Rullens; M.Devillers; A.Laschewsky, J.Mater.Chem., 2004 , 14, 3421-3426); although the hydrothermal method can obtain high-quality nanocrystalline grains, the process is not easy to control, and the yield is low (Luz Amparo Palacio; A.Echavarria; LSierra; E.A.Lombardo, Catalysis Today, 2005, 107- 108, 338-345)
At present, there are still few reports on the synthesis of nano-sized molybdates. The research and invention in this area have important theoretical and practical significance for expanding the potential application of molybdates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing molybdate nanocrystalline
  • Method for preparing molybdate nanocrystalline
  • Method for preparing molybdate nanocrystalline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 2.47g of ammonium heptamolybdate in 200mL of deionized water, stir to form a transparent solution of 0.01 mol / L; dilute concentrated ammonia water to a concentration of 2 mol / L, take 8.5mL and add dropwise to the ammonium heptamolybdate solution , to obtain a mixed solution of ammonium heptamolybdate and ammonia water; 3.77g of ferric nitrate was dissolved in 100mL of deionized water, and dissolved rapidly after stirring to form a transparent solution of 0.093 mol / liter. Under magnetic stirring at 400-1000 rpm, ferric nitrate solution is added dropwise to the mixed solution of ammonium heptamolybdate and ammonia water, and the solution immediately produces precipitation, which increases continuously as the reaction progresses. Continue to stir for 2 hours after the ferric nitrate solution is completely dripped in. The obtained precipitates are washed and filtered with deionized water and absolute ethanol for 3 times respectively, and then dried at 50°C for 5 hou...

Embodiment 2

[0025] Dissolve 2.47g of ammonium heptamolybdate in 200mL of deionized water, stir to form a transparent solution of 0.01 mol / L; dilute concentrated ammonia water to a concentration of 2 mol / L, take 8.5mL and add dropwise to the ammonium heptamolybdate solution , to obtain a mixed solution of ammonium heptamolybdate and ammonia; 3.26mL mass percent of 50% manganese nitrate solution was diluted to 100mL with deionized water to form a 0.14 mol / liter transparent solution. Add manganese nitrate solution dropwise to the mixed solution of ammonium heptamolybdate and ammonia water under magnetic stirring at 400-1000 rev / min, and precipitates will appear in the solution immediately, and the precipitates will continue to increase as the reaction progresses. Continue to stir for 2 hours after the manganese nitrate solution is completely dripped in. The obtained precipitates are washed and filtered with deionized water and absolute ethanol for 3 times respectively, and then dried at 50°C ...

Embodiment 3

[0027] Dissolve 2.47g of ammonium heptamolybdate in 200mL of deionized water, stir to form a transparent solution of 0.01 mol / L; dilute concentrated ammonia water to a concentration of 2 mol / L, take 8.5mL and add dropwise to the ammonium heptamolybdate solution , to obtain a mixed solution of ammonium heptamolybdate and ammonia water; 4.07g of cobalt nitrate was dissolved in 100mL of deionized water, and dissolved rapidly after stirring to form a transparent solution of 0.14 mol / liter. Under magnetic stirring at a speed of 400-1000 rpm, add cobalt nitrate solution dropwise to the mixed solution of ammonium heptamolybdate and ammonia water, and precipitates will appear in the solution immediately, and the precipitates will continue to increase as the reaction progresses. Continue to stir for 2 hours after the cobalt nitrate solution is completely dropped in, and the obtained precipitates are washed and filtered with deionized water and absolute ethanol for 3 times respectively, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Film diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing molybdate nano-crystalline, which is characterized in that: with hexaammonium molybdate and nitrate as raw materials, the method for preparing molybdate nano-crystalline comprises steps as follows: preparing mixed solution of ammonium paramolybdate and ammonia as well as solution of nitrate with a certain concentration; stirring forcibly at the room temperature and dripping the solution of nitrate into the solution of ammonium paramolybdate and ammonia to form precipitate; and filtering, drying and heat treating the precipitate to prepare the molybdate nano-crystalline. The prepared molybdate nano-crystalline is in the different shapes of nanometer grain, nanometer rod, nanometer wire or nanometer sheet. With cheap raw materials and easy operation, the molybdate synthesis method provided by the invention does not need complex instruments or expensive solvent, thus being a method for the quick preparation of the molybdate nano-crystalline. With different nanometer patterns, the prepared molybdate is provided with high degree of crystallinity and purity. The method for preparing molybdate nano-crystalline has the advantages of simple technique, easy control, environmental protection, and safe and reliable operation, and can be used for batch production.

Description

technical field [0001] The invention relates to a method for preparing a molybdate nanostructure. It belongs to the field of nanometer material preparation. Background technique [0002] Molybdates are an important class of inorganic functional materials. Because most of them have excellent luminescence, catalytic properties and semiconductor properties, they are widely used in luminescent materials, catalysts, sensors and other fields. Recent studies have shown that molybdates also have broad application prospects in lithium-ion batteries and microwave piezoelectric materials. Since the purity, particle size and morphology have an important influence on the properties of materials, especially the catalytic and semiconductor properties, it is very important to study and explore methods for preparing high-purity molybdate powders with nanometer size and morphology. Significance. [0003] The conventional method for preparing molybdate is solid phase reaction method. Becau...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G39/00
Inventor 高濂彭诚
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com