Process for preparing nanometer titanium dioxide
A nano-titanium dioxide and titanate technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high production cost, easy agglomeration of nano-titanium dioxide, complicated process, etc., to prevent sintering, increase dispersion, and reduce production. cost effect
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Embodiment 1
[0025] Add 200ml of ethanol solution of tetrabutyl titanate with a concentration of 0.10mol / L dropwise to 250ml of 12% ammonium chloride aqueous solution for 1 hour, react for 4 hours, add 1.9g of triethylamine, and let stand for 10 hours;
[0026] Heated to reflux and distilled under reduced pressure, dried at 80°C for 8 hours;
[0027] The dried solid is calcined for 3 hours at a temperature of 450° C. to obtain anatase titanium dioxide with a particle size of 10-60 nm. Its electron microscope photo see figure 1 .
Embodiment 2
[0029] Add 200 ml of a 0.80 mol / L tetrabutyl titanate butanol solution dropwise to 250 ml of a 35% ammonium chloride aqueous solution for 2 hours, react for 5 hours, add 5 g of monoethanolamine, and let stand for 10 hours;
[0030] Heating to reflux and distilling under reduced pressure, drying at 80°C for 8 hours; roasting the dried solid for 3 hours at 950°C to obtain rutile titanium dioxide with a particle size of 40-90nm. Its electron microscope photo see figure 2 .
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