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Process for preparing nano grade vanadium trioxide

A vanadium trioxide, nano-scale technology, applied in the field of functional materials and inorganic chemistry, can solve the problems of high price, high reaction temperature, and long synthesis route, and achieve the effect of low price and low reaction temperature

Inactive Publication Date: 2006-01-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new process allows for lower temperatures compared to previous methods while also reducing costs by utilizing commonly available chemical substances like ethanol or methane instead of expensive ones such as dimethyl sulfoxide (DMF).

Problems solved by technology

The technical problem addressed in this patents relates to finding ways to make finely dispersible or highly conductive ceramics that have good resistance against corrosives such as acids without causing damage over time due to their chemical nature.

Method used

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  • Process for preparing nano grade vanadium trioxide
  • Process for preparing nano grade vanadium trioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Will 9.00g V 2 o 5 and 20.2 g H 2 C 2 o 4 2H 2 Add O to 100mL of absolute ethanol, reflux reaction for 2h to obtain VOC 2 o 4 weak. Dilute the solution to 250mL with absolute ethanol, then transfer it to a 0.5L autoclave, seal it and gradually raise the temperature to 250°C, and the system pressure also rises to 9.1MPa. In this case, after 3 hours of incubation, ethanol was released at a constant temperature within 1.7 hours. When the solvent was about to be exhausted, the temperature of the kettle rose sharply, reaching 300°C. Turn off the heat and allow to cool to room temperature. 6.60 g of a black powder were obtained.

Embodiment 2

[0025] 8.00g VOC 2 o 4 Add it to 250mL of methanol, then transfer it to a 0.5L autoclave, and after sealing it, gradually raise the temperature to 200°C, and the system pressure also rises to 7.0MPa. In this case, after 2.4 hours of heat preservation, methanol is released at a constant temperature within 1.2 hours. When the solvent was about to be exhausted, the temperature of the kettle rose sharply, reaching 256°C. Turn off the heat and allow to cool to room temperature. Obtained 3.34g black Nano V 2 o 3 powder.

Embodiment 3

[0027] 8.00g VOC 2 o 4 Dissolve in 250mL of ethanol and isopropanol mixed solvent (volume ratio is 2:1), then transfer to a 0.5L autoclave, seal it and gradually raise the temperature to 245°C, and the system pressure also rises to 7.8MPa. In this case, after 2.0 hours of heat preservation, the solvent was released at a constant temperature within 1.0 hours. When the solvent was about to be exhausted, the temperature of the kettle rose sharply and reached 270°C. Turn off the heat and allow to cool to room temperature. Get 3.30g black Nano V 2 o 3 powder.

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Abstract

A process for preparing nano-V2O3 includes such steps as adding the solution of vanadyl oxalate to high-pressure reactor, reacting at a certain temp under a certain pressure, and removing solvent.

Description

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Claims

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Application Information

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Owner WUHAN UNIV
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