Graded mixed crystal TiO2 micro-nanomaterial, preparation method and application of micro-nanomaterial
A micro-nano and nano-wire technology, applied in the field of photocatalysis, to achieve the effects of environmental friendliness, mild reaction conditions and high product purity
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Embodiment 1
[0056] (1) Add 0.04mol / L tetrabutyl titanate dropwise to a mixed solution of 50mL ethanol and 80mL water, mix well, and obtain a sol after standing for 10 hours;
[0057] (2) Condensate the sol in step (1) with 0.4mol / L hydrochloric acid in an oil bath at 100°C for 22 hours to obtain a white emulsion;
[0058] (3) centrifuging the white emulsion in step (2), washing and drying in an oven, and calcining in a muffle furnace at 300°C;
[0059] (4) Disperse the white powder in step (3) in 7mol / L NaOH aqueous solution, and place it in a reaction kettle for hydrothermal reaction at 150°C for 5 hours;
[0060] (5) After the reaction is completed, the obtained white precipitate is centrifuged, washed to a pH value of 7, and then dried to obtain graded mixed crystal TiO 2 micro-nano materials.
[0061] figure 1 , figure 2 Shown is the graded mixed crystal TiO prepared in Example 1 2 SEM images of micro-nano materials at different magnifications. It can be seen from the figure tha...
Embodiment 2
[0063] (1) Add 0.04mol / L tetrabutyl titanate dropwise to a mixed solution of 50mL ethanol and 80mL water, mix well, and obtain a sol after standing for 10 hours;
[0064] (2) Condensate the sol of step (1) and 0.5mol / L hydrochloric acid in an oil bath at 100°C for 22 hours to obtain a white emulsion;
[0065] (3) centrifuging the white emulsion in step (2), washing and drying in an oven, and calcining in a muffle furnace at 300°C;
[0066] (4) Disperse the white powder in step (3) in 7mol / L NaOH aqueous solution, and place it in a reaction kettle for hydrothermal reaction at 150°C for 5 hours;
[0067] (5) After the reaction is completed, the obtained white precipitate is centrifuged, washed to a pH value of 7, and then dried to obtain graded mixed crystal TiO 2 micro-nano materials.
[0068] Figure 5 Shown is the graded mixed crystal TiO prepared in Example 2 2 The SEM image of the micro-nano material, it can be seen from the figure that the diameter of the flower-shaped...
Embodiment 3
[0070] (1) Add 0.04mol / L tetrabutyl titanate dropwise to a mixed solution of 50mL ethanol and 50mL water, mix well, and obtain a sol after standing for 12 hours;
[0071] (2) Condensate the sol in step (1) with 0.4mol / L hydrochloric acid in an oil bath at 100°C for 24 hours to obtain a white emulsion;
[0072] (3) centrifuging the white emulsion in step (2), washing and drying in an oven, and calcining in a muffle furnace at 300°C;
[0073] (4) Disperse the white powder in step (3) in 7mol / L NaOH aqueous solution, and place it in a reaction kettle for hydrothermal reaction at 150°C for 5 hours;
[0074] (5) After the reaction is completed, the obtained white precipitate is centrifuged, washed to a pH value of 7, and then dried to obtain graded mixed crystal TiO 2 micro-nano materials.
[0075] The SEM image shows that the diameter of the flower-shaped microsphere is about 3 μm, and it is composed of a nanowire basic structure. The diameter of the nanowire is about 15 nm, and...
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