Preparation method of neutral anatase type nano titanium dioxide sol
A nano-titanium dioxide, anatase-type technology, applied in sol preparation, titanium dioxide, chemical instruments and methods, etc., can solve the problems of high environmental requirements, unfavorable large-scale production, high price of titanium alkoxide, and improve photocatalytic performance. , good environmental friendliness, uniform effect of nanoparticles
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Embodiment 1
[0030] A preparation method of neutral anatase nano-titanium dioxide sol, comprising the following steps:
[0031] (1) Pour a certain amount of deionized water into the beaker, control the reaction temperature at about 0°C, and carry out magnetic stirring. Put a stirring magnet in the beaker and add 100ml of water, insert the thermometer into the magnetic stirring pot, Control the temperature at around 0°C; when the water temperature in the beaker is around 0°C, take 11ml of titanium tetrachloride and slowly add it to the beaker, there will be a lot of heat release during the process, control the hydrolysis temperature at around 2°C, after the hydrolysis is completed, it will be strongly acidic and transparent Solution: After the hydrolysis is completed, add 33ml of ammonia water with a concentration of 25-28ωt% to neutralize and stir continuously, and flocculent precipitates appear, until the pH becomes neutral, and age for 30 minutes.
[0032] (2) Cryogenic centrifuge to rem...
Embodiment 2
[0036] A preparation method of neutral anatase nano-titanium dioxide sol, comprising the following steps:
[0037] (1) Pour a certain amount of deionized water into the beaker, control the reaction temperature at about 0°C, and carry out magnetic stirring. Put a stirring magnet in the beaker and add 100ml of water, insert the thermometer into the magnetic stirring pot, Control the temperature at around 0°C; when the water temperature in the beaker is around 0°C, take 11ml of titanium tetrachloride and slowly add it to the beaker, there will be a lot of heat release during the process, control the hydrolysis temperature at around 2°C, after the hydrolysis is completed, it will be strongly acidic and transparent Solution: After the hydrolysis is completed, add 44ml of ammonia water with a concentration of 25-28ωt% to neutralize and stir continuously, and flocculent precipitation appears, until the pH becomes neutral, and age for 30 minutes.
[0038] (2) Cryogenic centrifuge to r...
Embodiment 3
[0042] A preparation method of neutral anatase nano-titanium dioxide sol, comprising the following steps:
[0043] (1) Pour a certain amount of deionized water into the beaker, control the reaction temperature at about 0°C, and carry out magnetic stirring. Put a stirring magnet in the beaker and add 100ml of water, insert the thermometer into the magnetic stirring pot, Control the temperature at around 0°C; when the water temperature in the beaker is around 0°C, take 11ml of titanium tetrachloride and slowly add it to the beaker, there will be a lot of heat release during the process, control the hydrolysis temperature at around 2°C, after the hydrolysis is completed, it will be strongly acidic and transparent Solution: After the hydrolysis is completed, add 33ml of ammonia water with a concentration of 25-28ωt% to neutralize and stir continuously, and flocculent precipitates appear, until the pH becomes neutral, and age for 30 minutes.
[0044] (2) Cryogenic centrifuge to rem...
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