Preparation method of spherical vanadium pentoxide particles
A technology of vanadium pentoxide particles and vanadium pentoxide, which is applied in the direction of vanadium oxide, microsphere preparation, liquid separation into beads and granulation, etc. It can solve the problems of complex preparation process, low sphericity, and uneven particle size. Achieve the effects of low calcination temperature, high sphericity and simple process flow
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[0023] The preparation method of spherical vanadium pentoxide particle provided by the invention comprises the following steps:
[0024] (1) adding vanadium pentoxide powder into water to form a suspension, then adding hydrogen peroxide solution, and stirring to form a transparent brick-red vanadium pentoxide solution;
[0025] (2) spray-dry the vanadium pentoxide solution that step (1) obtains, and granulate to obtain spherical powder;
[0026] (3) Calcining the spherical powder obtained in step (2) to obtain spherical vanadium pentoxide particles.
[0027] The present invention uses vanadium pentoxide powder as raw material, and after adding hydrogen peroxide solution, vanadium pentoxide is dissolved at room temperature to form a clear and transparent brick-red vanadium pentoxide solution, and vanadium pentoxide reacts with hydrogen peroxide to form Complex (V 2 [(OH) 3 o 2 ] - ), spray-dried and granulated to obtain spherical complex powder, and then roasted to obtain ...
Embodiment 1
[0040] Get 5g of vanadium pentoxide powder, form a suspension in 100ml of deionized water, then add a hydrogen peroxide solution with a concentration of 10% by mass according to the molar ratio of the added vanadium pentoxide and hydrogen peroxide in a ratio of 1:7.1 , using a magnetic stirrer to stir the feed liquid, the stirring rate is 300 rpm, and the stirring time is 25min, forming a vanadium pentoxide solution in deionized water; the spray dryer is fed with a peristaltic pump, the speed is 200mL / h, and the air inlet The temperature is controlled at 250°C, and the liquid is sprayed to obtain spherical powder; the spherical powder is roasted in a muffle furnace at a roasting temperature of 400°C in an air atmosphere for 4 hours to obtain spherical vanadium pentoxide particles.
[0041] from figure 1It can be seen from the shown SEM photos that the vanadium pentoxide particles prepared in Example 1 are spherical and have a high degree of sphericity.
Embodiment 2
[0043] Get 5g of vanadium pentoxide powder, form a suspension in 100ml of deionized water, then add a hydrogen peroxide solution with a concentration of 5% by mass according to the molar ratio of the added vanadium pentoxide and hydrogen peroxide in a ratio of 1:10.8 , use a magnetic stirrer to stir the feed liquid, the stirring rate is 400 rpm, and the stirring time is 20min, forming a vanadium pentoxide solution in deionized water; the spray dryer uses a peristaltic pump to feed the material, the speed is 200mL / h, and the air inlet The temperature is controlled at 300°C, and the material liquid is sprayed to obtain spherical powder; the spherical powder is roasted in a muffle furnace at a roasting temperature of 450°C in an air atmosphere for a roasting time of 6 hours to obtain spherical vanadium pentoxide particles.
[0044] from figure 2 It can be seen from the shown SEM photos that the vanadium pentoxide particles prepared in Example 2 are spherical and have a high degr...
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