Method for preparing nano vanadium dioxide by taking pentavalent vanadium alkoxide as raw material

A technology of vanadium dioxide and pentavalent vanadyl alcohol, applied in vanadium oxide, nanotechnology and other directions, can solve the problems of inability to meet particle size requirements, high industry demands, excessive particle size of vanadium dioxide, etc., and achieves easy popularization and application, Controllable process and good uniformity

Inactive Publication Date: 2020-12-25
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: the particle size of vanadium dioxide prepared by the existing solvothermal method is still too large to meet the needs of industries with high particle size requirements

Method used

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  • Method for preparing nano vanadium dioxide by taking pentavalent vanadium alkoxide as raw material
  • Method for preparing nano vanadium dioxide by taking pentavalent vanadium alkoxide as raw material

Examples

Experimental program
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Embodiment 1

[0031] Stir and mix 70 g of toluene, 0.2 g of vanadyl triisopropoxide, 0.1 g of oleylamine and 2 g of formaldehyde to form a uniform solution. The solution was placed in a reaction kettle lined with polytetrafluoroethylene, and reacted at 180° C. for 2 hours. After the reaction, the product was centrifuged, washed, and dried to obtain a blue-black powder. figure 1 It is the XRD spectrum of the powder, indicating that the crystal form is M phase, figure 2 It is a SEM picture, and it can be seen that the particle size of the product is about 50nm.

Embodiment 2

[0033] Stir and mix 70 g of tetrahydrofuran, 0.4 g of vanadyl triisopropoxide, 0.5 g of oleylamine and 6 g of formic acid to form a uniform solution. The solution was placed in a reaction kettle lined with polytetrafluoroethylene, and reacted at 160° C. for 10 h. After the reaction, the product was centrifuged, washed, and dried to obtain a blue-black powder. Obtain M-phase VO with a particle size of 40-60nm 2 . The particle size is about 50nm.

Embodiment 3

[0035] Stir and mix 70 g of dioxane, 0.5 g of vanadyl triisopropoxide, 0.9 g of oleylamine and 9 g of methylamine to form a uniform solution. The solution was placed in a reaction kettle lined with polytetrafluoroethylene, and reacted at 150° C. for 14 hours. After the reaction, the product was centrifuged, washed, and dried to obtain a blue-black powder. Obtain M-phase VO with a particle size of 40-60nm 2 . The particle size is about 50nm.

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Abstract

The invention belongs to the technical field of preparation of vanadium dioxide, and particularly relates to a method for preparing nano vanadium dioxide by taking pentavalent vanadium alkoxide as a raw material. Aiming at the problem that the particle size of vanadium dioxide prepared by the existing solvothermal method is still too large, the invention provides the method for preparing nano vanadium dioxide by taking pentavalent vanadium alkoxide as the raw material. The method comprises the following steps: uniformly mixing an organic solvent, pentavalent vanadium alkoxide, a morphology regulating agent and an organic reducing agent in a mass ratio of 70: (0.2-1): (0.1-1): (2-10) to form a uniform solution; and putting the solution into a reaction kettle with a polytetrafluoroethylene lining, reacting at 120-180 DEG C for 2-24 hours, and centrifuging, washing and drying the product after the reaction is finished, thereby obtaining the nano vanadium dioxide powder. The prepared vanadium dioxide powder can be synthesized in one step, the technological method is simple, low in cost and easy to apply and popularize, and the prepared vanadium dioxide is high in particle size crystallinity, good in uniformity, smaller in particle size and suitable for being used as a window film material, and the particle size is about 40-60 nm.

Description

technical field [0001] The invention belongs to the technical field of vanadium dioxide preparation, and in particular relates to a method for preparing nano vanadium dioxide by using pentavalent vanadium alkoxide as a raw material. Background technique [0002] VO 2 Powder preparation methods mainly include liquid phase method, solid phase method, sol-gel method, and thermal decomposition method. Among them, the solid phase method generally needs to go through a high temperature process, and the prepared powder has large particle size and poor uniformity. The agglomeration is serious, and the product morphology cannot be effectively controlled; although the sol-gel method can prepare powder with ideal particle size and uniformity, it also needs heat treatment, which has the problems of high energy consumption and high process cost; The thermal decomposition method also has the problems of high energy consumption and low yield. Different from other methods, the liquid-phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B82Y40/00
CPCB82Y40/00C01G31/02C01P2002/72C01P2004/03C01P2004/64
Inventor 刘波彭穗辛亚男韩慧果
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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