Process for preparing anatase type nano-titanium dioxide
A nano-titanium dioxide, anatase type technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low equipment material requirements, low operating temperature, expensive raw materials, etc., and achieve low cost and uniform particle size distribution. , the effect of less raw material components
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Embodiment 1
[0029] like figure 1 So, 1) Get 50ml of absolute ethanol and put it into an ice-water bath, add 10ml of TiCl dropwise 4 , a pale yellow solution was obtained. The light yellow solution was vigorously stirred in an ice-water bath for 10 minutes, then 50 ml of deionized water was added to form a colorless transparent solution, and the vigorous stirring was continued for 120 minutes. 2) Then add ρ=0.91×10 3 kg / m 3 ammonia solution to pH = 8 to obtain a white solid; then filtered and washed with deionized water to pH = 7 to obtain an anatase nano-titanium dioxide precursor (white solid). 3) Add 50ml of ρ=1.11×10 to the anatase nano-titanium dioxide precursor 3 kg / m 3 H 2 o 2 , Stirring at 60°C for 2h, a yellow sol was obtained. Transfer the yellow sol into a polytetrafluoroethylene-lined reactor for hydrothermal treatment at 140°C for 2 hours, and vacuum-dry at 60°C to obtain white anatase-type nano-titanium dioxide powder with high activity and controllable particle size...
Embodiment 2
[0031] 1) Take 200ml of absolute ethanol and put it in an ice water bath, add 10ml of TiCl dropwise 4 , a pale yellow solution was obtained. The light yellow solution was vigorously stirred in an ice-water bath for 60 minutes, then 300 ml of deionized water was added to form a colorless transparent solution, and the vigorous stirring was continued for 10 minutes. 2) Then add ρ=0.91×10 3 kg / m 3 ammonia solution to pH = 8 to obtain a white solid, which was then filtered and washed with deionized water until pH = 7 to obtain an anatase-type nano-titanium dioxide precursor (white solid). 3) Add 200ml of ρ=1.11×10 to the anatase nano-titanium dioxide precursor 3 kg / m 3 H 2 o 2 , Stirring at 60°C for 2h, a yellow sol was obtained. Transfer the yellow sol into a polytetrafluoroethylene-lined reactor for hydrothermal treatment at 180°C for 8 hours, and vacuum-dry at 60°C to obtain white anatase-type nano-titanium dioxide powder with high activity and controllable particle size....
Embodiment 3
[0033] 1) Take 100ml of absolute ethanol and put it in an ice-water bath, add 10ml of TiCl dropwise 4 , a pale yellow solution was obtained. The light yellow solution was vigorously stirred in an ice-water bath for 40 minutes, then 150 ml of deionized water was added to form a colorless transparent solution, and the vigorous stirring was continued for 90 minutes. 2) Then add ρ=0.91×10 3 kg / m 3 ammonia solution to pH = 8 to obtain a white solid, which was then filtered and washed with deionized water until pH = 7 to obtain an anatase-type nano-titanium dioxide precursor (white solid). 3) Add 100ml of ρ=1.11×10 to the anatase nano-titanium dioxide precursor 3 kg / m 3 H 2 o 2 , Stirring at 60°C for 2h, a yellow sol was obtained. Transfer the yellow sol into a polytetrafluoroethylene-lined reactor for hydrothermal treatment at 160°C for 4 hours, and vacuum-dry at 60°C to obtain white anatase-type nano-titanium dioxide powder with high activity and controllable particle size....
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