2D porous TiO2 nanosheet rich in surface defects and preparation method of 2D porous TiO2 nanosheet
A nanosheet and defect technology, which is applied in the field of 2D porous TiO2 nanosheets with rich surface oxygen vacancies and their preparation, can solve the problems of low photocatalytic efficiency and the like, and achieve the effects of increasing defect concentration, improving performance and low cost
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[0030] Example 1
[0031] (1) Preparation of graphene oxide GO powder for use:
[0032] Add 1.5g graphite powder into a 500mL beaker, and then add 180mL of 98% H 2 SO 4 And 20 mL of 85% H 3 PO 4 Mix and slowly drip into the above beaker with gentle stirring. Transfer the solution to an oil bath and heat at 50°C. Subsequently, 9g KMnO 4 Disperse in batches in the mixed solution and keep the reaction system at 50±1°C. After stirring vigorously for 12 hours under sealed conditions, slowly inject 30% H from the bottom of the beaker 2 O 2 And keep the reaction solution at 50±1°C. It was observed that the color of the solution changed from black to purple to bright yellow until no bubbles were generated. The obtained sample was washed with distilled water and centrifuged until the pH value was 5-6, and the obtained solid was freeze-dried and stored in a drying box. .
[0033] (2) Preparation of GO@Ti(OH) 4 Composite material, spare:
[0034] 90 mg GO was dispersed in 180 mL of absolute...
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[0039] Example 2
[0040] Step (1), step (2) and step (3) of this embodiment are the same as in embodiment 1;
[0041] (4) Preparation of 2D porous TiO rich in surface defects 2 Nanosheet material:
[0042] The 2D porous TiO prepared in step (3) 2 The nanosheets were calcined at 500°C in a reducing atmosphere (90vol.% argon and 10vol.% hydrogen) for 4 hours to obtain 2D porous TiO rich in surface defects 2 Nanosheets. The heating rate is 2℃ / min
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[0043] Example 3
[0044] Step (1), step (2) and step (3) of this embodiment are the same as in embodiment 1;
[0045] (4) Preparation of 2D porous TiO rich in surface defects 2 Nanosheet material:
[0046] The 2D porous TiO prepared in step (3) 2 The nanosheets are calcined at 500°C in a reducing atmosphere (90vol.% argon and 10vol.% hydrogen) for 6 hours to obtain 2D porous TiO rich in surface defects 2 Nanosheets. The heating rate is 2℃ / min
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