Two-phase TiO2 nanotube photocatalyst as well as preparation method and application thereof
A photocatalyst and nanotube technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex preparation process and high production cost, achieve simple operation and improve redox ability. Effect
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[0027] The present invention provides a two-phase TiO 2 The preparation method of nanotube photocatalyst comprises the following steps:
[0028] At room temperature, mix titanate nanotubes and acid solution for protonation to obtain a protonated product;
[0029] The protonated product was washed and dried sequentially to obtain a two-phase TiO 2 Nanotube photocatalyst; the drying temperature is 80-170°C.
[0030] In the present invention, unless otherwise specified, the raw materials used are conventional commercially available products in the field or prepared by conventional methods in the field.
[0031] In the present invention, under room temperature conditions, titanate nanotubes are mixed with an acid solution for protonation; the protonated products are sequentially washed and dried to obtain two-phase TiO 2 nanotube photocatalysts.
[0032] In the present invention, the acid solution is preferably nitric acid solution or hydrochloric acid solution; the molar conc...
Embodiment 1
[0051] (1) Take 1.5g metal titanium powder, the particle size is 400 mesh, mix with 30mL 8mol / L sodium hydroxide solution, stir at room temperature for 4h, then transfer to high-temperature and high-pressure reactor, hydrothermally react at 140°C for 72h, and the obtained product After washing with distilled water until neutral, it was dried in an oven at 60°C to obtain white powdered sodium titanate nanotubes.
[0052] (2) Mix 1.5 g of white powdered sodium titanate nanotubes obtained in step (1) with 30 mL of 1mol / L nitric acid solution for protonation, stir at room temperature for 4 hours, wash with water until neutral, and transfer it to a 60°C oven for drying , mixed with 30mL 1mol / L nitric acid solution again for protonation, stirred at room temperature for 4 hours, washed with water to neutrality, and dried in a 90°C oven to obtain anatase / H-titanate nanotubes, that is, two-phase TiO 2 nanotube photocatalysts.
[0053] The present invention detects the two-phase TiO t...
Embodiment 2
[0056] (1) Take 0.8g metal titanium powder, the particle size is 400 mesh, mix with 30mL 10mol / L sodium hydroxide solution, stir at room temperature for 4h, then transfer to high temperature and high pressure reactor for hydrothermal reaction at 140°C for 72h, and use the obtained product After washing with distilled water until neutral, it was dried in an oven at 60°C to obtain white powdered sodium titanate nanotubes.
[0057] (2) Mix 1.5 g of white powdered sodium titanate nanotubes obtained in step (1) with 30 mL of 1mol / L nitric acid solution for protonation, stir at room temperature for 4 hours, wash with water until neutral, and transfer it to a 60°C oven for drying , mixed with 30mL 1mol / L nitric acid solution again for protonation, stirred at room temperature for 4 hours, washed with water to neutrality, and dried in a 90°C oven to obtain anatase / H-titanate nanotubes, that is, two-phase TiO 2 nanotube photocatalysts.
[0058] The present invention detects the two-ph...
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