Preparation method of covalent triazinyl nanosheet with wide visible light response and application thereof
A technology of covalent triazine and nanosheets, which is applied in chemical instruments and methods, hydrogen production, light water/sewage treatment, etc., can solve the problems of reducing the photoresponse range and widening the energy band, and achieving the improvement of light Catalytic efficiency, low cost, and the effect of improving the absorption range
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Embodiment 1
[0042] (1) Preparation of layered bulk covalent triazine-based materials:
[0043] Block material was prepared by sealing tube method: 0.3 g of terephthalonitrile and 200 μmL of trifluoromethanesulfonic acid were added into a glass tube with a length of 15 cm and a radius of 5 mm, and the glass tube was sealed with an oxygen-hydrogen flame. Finally, put the sealed glass tube in a blast drying oven at 200°C for 40 hours and cool down to normal temperature naturally after the heat preservation. The glass tube after the reaction was put into liquid nitrogen for cooling treatment for 5 minutes. After cooling, the glass tube was opened with a glass knife to take out the reactant. The reactant was washed several times with deionized water and ethanol and dried in vacuum.
[0044] figure 1 is a layered bulk covalent triazine-based material, indicating that layered triazine materials were successfully prepared.
[0045] (2) Preparation of oxidized covalent triazine-based nanosheets:...
Embodiment 2
[0057] The layered triazine block was obtained by the method in the above-mentioned Example 1, and 600 mg of the triazine block was added to 10 ml of oxidizing acid, and stirred for 5 h. After the stirring was completed, 50 ml of deionized water was added, and the stirring was continued for 5 h, then filtered and washed to neutrality, and lyophilized to obtain oxidized covalent triazine-based nanosheets.
[0058] Add 100 mg of the obtained oxidized covalent triazine-based nanosheets into 20 ml of deionized water, and simply disperse them by ultrasound, add 200 μml of hydrazine hydrate and stir at room temperature for 5 hours, then suction filter and freeze-dry to obtain reduced covalent triazine-based nanosheets.
Embodiment 3
[0060] The layered triazine block was obtained by the method in Example 1 above, and 400 mg of the triazine block was added to 5 ml of oxidizing acid, and stirred for 5 h. After the stirring was completed, 50 ml of deionized water was added, and the stirring was continued for 5 h, then filtered and washed to neutrality, and lyophilized to obtain oxidized covalent triazine-based nanosheets.
[0061] Add 100 mg of the obtained oxidized covalent triazine-based nanosheets into 20 ml of deionized water, and simply disperse them by ultrasound, add 200 μml of hydrazine hydrate and stir at room temperature for 5 hours, then suction filter and freeze-dry to obtain reduced covalent triazine-based nanosheets.
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