Method for preparing nanometer Ti4O7 powder

Abstract

The invention discloses a method for preparing nanometer Ti4O7 powder. The weight percentages of various raw materials are as follows: 96-97 percent of titanium dioxide powder, 2.9-3.9 percent of nanometer black powder and 0.1-1 percent of aromatic aldehyde. The process comprises the following steps: (1) putting titanium dioxide powder, nanometer black powder and aromatic aldehyde which are measured according to the weight percentages into a ball mill; adding a grinding ball body and a grinding medium for wet milling and dispersion at the constant pressure and the room temperature; separating the grinding ball body after the titanium dioxide powder, the nanometer black powder and the aromatic aldehyde are uniformly mixed so as to obtain mixed slurry; and then drying the mixed slurry for 1-3 hours at the temperature of between 60 and 80 DEG C; and (2) filling the mixture prepared in the step (1) into a heating furnace; and heating the mixture to be at 800-1150 DEG C under a vacuum condition or a condition that inertia gas flows and performing reduction reaction for 1-4 hours at the temperature; and cooling the mixture to the room temperature along with the furnace after the reaction time is up.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a nanometer Ti 4 o 7 Method of powder preparation. Background technique [0002] Ti 4 o 7 It is a single-phase titanium black, which has excellent thermodynamic stability and electrical conductivity, and can be used as an electrode material for lithium batteries, lithium-air batteries and fuel cells, so it has attracted extensive attention. However, as an electrode material, not only high conductivity, but also high specific surface area and activity are required. U.S. Patent No. 4,422,917 discloses an electrode material, an electrode, and an electrochemical cell. A Ti-containing 4 o 7 、Ti 5 o 9 ,, Ti 6 o 11 and other multi-component titanium oxide mixtures, because the product is not a single-phase Ti 4 o 7 , and the particle size is relatively coarse, so the conductivity and activity are not high; Chinese patent CN 102208658A discloses a nano-Ti 4 o 7 Process for the ...

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Problems solved by technology

U.S. Patent No. 4,422,917 discloses an electrode material, an electrode, and an electrochemical cell. A Ti-containing 4 o 7 、Ti 5 o 9 ,, Ti 6 o 11 and other multi-component titanium oxide mixtures, because the product is not a single-phase Ti 4 o 7 , and the particle size is relatively coarse, so the conductivity and activity are not high; Chinese patent CN 102208658A discloses a nano-Ti 4 o 7 Process for the preparation of particles using tetraethyl silicate as SiO 2 The precursors were coated in TiO 2 The surface of the powder is then heat-treated in a reducing atmosphere, and the surface-coated silicon is used to inhibit the growth of the product particles, and the silicon-containing nano-Ti is prepared 4 o 7 Particles, and then remove the SiO in the product by alkali or hydrofluoric acid etching 2 , although this method obtains nano-Ti with a single phase composition 4 o 7 Powder, but the process is complex and difficult to control, so industrial production is difficult and costly

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