A kind of synthetic method of titanium dioxide nanopowder
A technology of titanium dioxide and synthesis methods, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of unsuitable synthesis of a large number of products, uneven grain size distribution, irregular shape, etc., and achieve easy The operation and preparation method are simple, and the effect of crystal morphology is neat
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Embodiment 1
[0045] Add 240 mL of tetraisopropyl titanate dropwise into 200 mL of glacial acetic acid with stirring, then drop into 550 mL of oleylamine, continue stirring and mixing evenly, add 300 mL of 88 wt% formic acid solution, and continue stirring for 2 hours. Transfer the above materials to a 3000mL static reaction kettle, seal it, and take it out from the reaction kettle after reacting at a constant temperature of 180°C for 24 hours. After naturally cooling to room temperature, centrifuge to separate the white powder. Wash with absolute ethanol three times, and finally dry at 80°C for 24 hours, heat up to 450°C at 5°C / min and bake for 2 hours to obtain titanium dioxide nanopowder A1. The crystal structure of titanium dioxide nanopowder A1 is anatase structure and brookite structure, of which brookite structure accounts for 15.0%, the appearance of titanium dioxide is octahedral, and the grain size is 40~70nm, see figure 1 .
Embodiment 2
[0047] The synthesis process was the same as in Example 1, except that the amount of oleylamine added was 1050 mL, and the amount of formic acid solution (88 wt%) added was 200 mL, to obtain titanium dioxide nanopowder B. The crystal structure of titanium dioxide nanopowder B is anatase structure and brookite structure, of which brookite structure accounts for 21.0%, the appearance of titanium dioxide is octahedral, and the grain size is 40-70nm.
Embodiment 3
[0049] The synthesis process was the same as in Example 1, except that tetraisopropyl titanate was replaced by tetraisobutyl titanate, and the addition amount was 300 mL to obtain titanium dioxide nanopowder C. The crystal structure of titanium dioxide nanopowder C is anatase structure and brookite structure, of which the brookite structure accounts for 24.0%. The appearance of titanium dioxide is octahedral, and the grain size is 40-70nm.
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