Preparation method of composite titanium dioxide
A rutile type titanium dioxide and titanium dioxide technology, applied in chemical instruments and methods, titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of high production cost of composite titanium dioxide, and achieve sufficient raw material sources, no environmental pollution, The effect of reducing resource consumption
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Embodiment 1
[0020] Embodiment 1: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:
[0021] (1) Preparation of rutile titanium dioxide
[0022] Weigh 30g solid Ti(NO 3 ) 4 Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 7.5, stop dripping ammonia solution, and generate fresh Ti(OH) 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3:1, set the temperature at 55°C, reflux peptization for 25min, the obtained precipitate is centrifuged, washed three times with a...
Embodiment 2
[0025] Embodiment 2: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:
[0026] (1) Preparation of rutile titanium dioxide
[0027] Weigh 30g solid Ti(NO 3 ) 4Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 8 o'clock, stop adding ammonia solution dropwise, and generate fresh Ti(OH) at this moment 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3:1, set the temperature at 60°C, reflux peptization for 20min, the obtained precipitate is centrifuged...
Embodiment 3
[0030] Embodiment 3: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:
[0031] (1) Preparation of rutile titanium dioxide
[0032] Weigh 30g solid Ti(NO 3 ) 4 Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 8 o'clock, stop adding ammonia solution dropwise, and generate fresh Ti(OH) at this moment 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3.5:1, set the temperature at 70°C, reflux and peptize for 10min, the obtained precipitate is centrifu...
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