A kind of preparation method of high-energy surface titanium dioxide nanosheet photocatalyst
A technology of titanium dioxide and photocatalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of long reaction time and high energy consumption, and achieve easy operation, low energy consumption and high activity Effect
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Embodiment 1
[0026] In order to examine the effect of solvothermal time on the preparation of titania nanosheets, a time-controlled experiment was performed. Take 2g of titanyl difluoride (marked as sample S0) and mix with 40mL of tert-butanol, stir and disperse for 10 minutes, then transfer the mixture to a stainless steel reactor with Teflon lining; after sealing the reactor, heat Keep the temperature of the mixed solution at 180°C for 1, 2, 5, 10, and 24 hours respectively;
[0027] After the reaction kettle was cooled to room temperature, the obtained precipitates were repeatedly washed with distilled water until the pH of the eluate = 7, and then each precipitate was dried in a vacuum drying oven at 80°C for 8 hours, and the obtained samples were respectively marked as S1 , S2, S5, S10, S24.
[0028] The transmission electron microscope photos show that the S1 powder sample ( figure 1 b) and the raw material titanyl oxyfluoride ( figure 1 a) The same block shape, sample S2 ( figur...
Embodiment 2
[0030] In order to examine the effect of tert-butanol on the structure of the prepared titania nanosheets, a solvent control experiment was carried out. Except that 40mL of tert-butanol was replaced by 40mL of ethanol, and the heating time was set at 24 hours, all the other operations were exactly the same as in Example 1, and the obtained sample was marked as Sc. Powder X-ray diffraction spectrum results show that Sc is anatase titanium dioxide ( Figure 4 h), high-resolution transmission electron microscopy shows that there is also a high-energy surface (001 surface) ( image 3 b).
Embodiment 3
[0032]In order to examine the effect of tert-butanol on the structure of the prepared titania nanosheets, a solvent control experiment was carried out. Except that 40mL ethanol was replaced with 40mL oleylamine, all the other reaction conditions and operations were identical to those in Example 2. The resulting sample is denoted as Sy. Powder X-ray diffraction spectrum results show that Sy is anatase titanium dioxide ( Figure 4 i), high-resolution transmission electron microscopy shows that there is a high-energy surface (001 surface) ( image 3 c).
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