Method for regulating and controlling crystal form of titanium dioxide
A titanium dioxide and crystal form control technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of high reaction temperature and harsh conditions in the preparation process, and achieve simple and easy preparation process, low energy consumption, Response to safe and accurate results
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Embodiment 1
[0057] In a dry environment, titanium tetrachloride (TiCl 4 ) was slowly added dropwise into deionized water at 2°C to prepare 0.2mol / L TiCl 4 Solution, the dropping rate is 0.5mL / min; TiCl 4 The solution was uniformly mixed with sulfuric acid solution, and the pH of the mixed solution was adjusted to 1.8; the mixed solution was stirred and reacted at a constant temperature at 60° C. for 10 hours, then naturally cooled to room temperature, centrifuged, washed, and dried to obtain titanium dioxide crystalline powder.
[0058] By fitting and analyzing the main peak of the X-ray diffraction pattern of the obtained titanium dioxide crystal powder, according to figure 1 and figure 2 , it is estimated that the titanium dioxide crystal form is pure anatase phase.
Embodiment 2
[0060] In a dry environment, the TiCl 4 Add 0.2 mol / L TiCl slowly to 2°C deionized water 4 Solution, the dropping rate is 0.5mL / min; TiCl 4 The solution was uniformly mixed with the hydrochloric acid solution, and the pH of the mixed solution was adjusted to 0.9; the mixed solution was stirred and reacted at a constant temperature at 60° C. for 4 hours, then naturally cooled to room temperature, centrifuged, washed, and dried to obtain titanium dioxide crystal powder.
[0061] By fitting and analyzing the main peak of the X-ray diffraction pattern of the obtained titanium dioxide crystal powder, according to image 3 and Figure 4 , it is estimated that the titanium dioxide crystal form includes 66.4% anatase phase and 33.6% rutile phase.
Embodiment 3
[0063] In a dry environment, the TiCl 4 Add 0.2 mol / L TiCl slowly to 2°C deionized water 4 Solution, the dropping rate is 0.5mL / min; TiCl 4 The solution was uniformly mixed with the hydrochloric acid solution, and the pH of the mixed solution was adjusted to 0.3; the mixed solution was stirred and reacted at a constant temperature at 60° C. for 6 hours, then naturally cooled to room temperature, centrifuged, washed, and dried to obtain titanium dioxide crystal powder.
[0064] By fitting and analyzing the main peak of the X-ray diffraction pattern of the obtained titanium dioxide crystal powder, according to Figure 5 and Image 6 , it is estimated that the titanium dioxide crystal form includes 15.4% anatase phase and 84.6% rutile phase.
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