A preparing method of rutile vanadium dioxide nanometer particles and the particles

Abstract

A preparing method of rutile vanadium dioxide nanometer particles is disclosed. The method includes 1) preheating purified water or deionized water until the water is boiling, adding a vanadium compound, stirring to obtain a vanadium compound suspension A, cooling to room temperature, adding ammonia water, sealing a container, and stirring for 0.5-3 h until a transparent solution B is prepared, 2) adding a hydrazine compound into the transparent solution B, stirring to obtain black suspension C, transferring the suspension C to a hydrothermal reactor, heating and reacting to obtain a black brown suspension D, 3) transferring the black brown suspension D into a transparent container, adding ethanol, allowing the mixture to stand so that the mixture is layered naturally after the solution is stationary, removing the supernatant liquid, adding ethanol again, stirring, allowing the mixture to stand, naturally layering, and removing the supernatant liquid again to obtain wet powder E, and 4) drying and oxidizing the wet powder E in a drying oven, firing in an atmosphere furnace containing a protective atmosphere, and treating to obtain the rutile vanadium dioxide nanometer particles. Raw materials of the method are cheap. The method greatly reduces emission of 'three wastes' or secondary environment pollution.

Description

technical field [0001] The invention belongs to the chemical field of metal-insulator phase-change materials, and relates to a preparation method of rutile-phase vanadium dioxide nanoparticles and particles thereof, in particular to a thin film that can be used in the fields of temperature-controlling glass, optical sensor, light-absorbing material, and self-cleaning glass Process for the preparation of rutile phase vanadium dioxide nanoparticles for coatings and particles thereof. Background technique [0002] The increasingly serious energy problem and environmental pollution have become a global key issue. The demand for clean energy and new environmentally friendly and energy-saving materials is growing rapidly. Among them, building energy consumption, especially temperature control equipment such as air conditioning and heating, has accounted for about 30% of the total energy consumption according to statistics. Studies have found that coating the glass surface of bui...

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Problems solved by technology

Therefore, the sintering process after deposition requires careful control of the composition and time of the atmosphere to avoid the formation of impurities, resulting in lower yields and higher costs

Second, magnetron sputtering (it is more difficult to prepare vanadium oxide films with extremely strict requirements), sol-gel and vapor-phase deposited films are usually dense in particles, and usually have lower visible light under the same temperature adjustment performance parameters. The light transmittance and darker colors (such as dark gray, blue, brown, yellow, etc.) are insufficient in aesthetics, so that they cannot meet the needs of the general market (such as residences, office buildings, and automobiles, etc.), and the process is complicated and the output low

Finally, general deposition methods generally require higher temperatures (generally above 400°C), which limits the substrates for deposition, such as polymer-based flexible materials, thereby limiting the development of flexible and replaceable automotive and residential glass films. , promotion and application

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