A kind of nanometer tio2 single crystal material and its preparation method and application
A single crystal material and nanotechnology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of specific surface area decrease, and achieve the effect of uniform size, good crystallinity and mild reaction conditions
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Embodiment 1
[0036] (1) Add 2.5mL of deionized water dropwise to 50mL of absolute ethanol, slowly add 2mL of butyl titanate dropwise, and stir evenly to obtain a light blue sol, then add 28mL of deionized water, continue stirring evenly, and let stand overnight , forming a gel;
[0037] (2) centrifuging the gel in step (1) to obtain a white precipitate, washing with ethanol to remove unreacted butyl titanate, and then washing with deionized water to remove ethanol;
[0038] (3) Take 1 / 4 of the precipitation in step (2) and disperse it in 50 mL of ethanol, and place it in a reaction kettle at 150° C. for 5 hours;
[0039] (4) After the reaction is completed, the obtained white emulsion is centrifuged, the precipitate is washed and freeze-dried at -65°C to obtain anatase TiO with uniform particle size distribution. 2 single crystal material.
[0040] The TiO that present embodiment makes 2 The single crystal material contains a large number of nanoparticles with regular shape, uniform siz...
Embodiment 2
[0042](1) Add 4 mL of deionized water dropwise to 50 mL of absolute ethanol, slowly add 2.5 mL of tetraisopropyl titanate dropwise, and stir evenly to obtain a light blue sol, then add 36 mL of deionized water, continue stirring evenly, and left overnight to form a gel;
[0043] (2) centrifuging the gel in step (1) to obtain a white precipitate, washing with ethanol to remove unreacted tetraisopropyl titanate, and then washing with deionized water to remove ethanol;
[0044] (3) Take 1 / 4 of the precipitation in step (2) and disperse it in a system with a volume ratio of 50mL of ethanol to water of 5:5, and place it in a reaction kettle at 150°C for 5 hours;
[0045] (4) After the reaction is completed, the obtained white emulsion is centrifuged, the precipitate is washed and freeze-dried at -75°C to obtain anatase TiO with uniform particle size distribution. 2 single crystal material.
[0046] The TiO that present embodiment makes 2 The single crystal material contains a la...
Embodiment 3
[0048] (1) Add 3 mL of deionized water dropwise to 50 mL of absolute ethanol, slowly add 2 mL of butyl titanate dropwise, and stir evenly to obtain a light blue sol, then add 28 mL of ultrapure water, continue stirring evenly, and let stand overnight, form a gel;
[0049] (2) centrifuging the gel in step (1) to obtain a white precipitate, washing with ethanol to remove unreacted butyl titanate, and then washing with deionized water to remove ethanol;
[0050] (3) Take 1 / 6 of the precipitation in step (2) and disperse it in 50 mL of ethanol, and place it in a reaction kettle at 150° C. for 15 hours;
[0051] (4) After the reaction is completed, the obtained white emulsion is centrifuged, the precipitate is washed and freeze-dried at -50°C to obtain anatase TiO with uniform particle size distribution. 2 single crystal material.
[0052] The TiO that present embodiment makes 2 The single crystal material contains a large number of nanoparticles with regular shape, uniform size...
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