Preparation method of silver-doped titania nanotubes and oxygen indicator
A technology of indicators and nanotubes, which is applied in the field of inorganic chemistry and material preparation, can solve the problems of high recombination rate of photogenerated electrons and photogenerated holes, limited photocatalytic effect, complex process, etc., and achieves high specific surface area, environmental friendliness and process simple effect
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Embodiment 1
[0036] (1) Preparation of TiO 2 nanotube:
[0037] 2g of TiO 2 Add the powder into 40ml of NaOH solution with a molar concentration of 8mol / L, and stir ultrasonically for 30min to make the TiO 2 The powder is dispersed to obtain a mixed solution. Add the mixed solution into a hydrothermal reaction kettle, react at 100°C for 48 hours, and centrifuge to obtain a precipitate. Use hydrochloric acid with a molar concentration of 1 mol / L to neutralize the precipitate and sonicate for 20 minutes, and then wash with deionized water until the pH of the precipitate is 6-7. The precipitate was dried in a freeze drying oven for 10 h, and then calcined in a muffle furnace at 200 °C for 6 h to obtain TiO 2 nanotube.
[0038] (2) Preparation of silver-doped TiO 2 nanotube:
[0039] 2g of TiO 2 Nanotubes were ultrasonically dispersed in 40 ml of deionized water to obtain A suspension, and 0.003 g of silver nitrate was ultrasonically dispersed in 3 ml of dimethylformamide and 30 ml of ...
Embodiment 2
[0048] (1) Preparation of TiO 2 nanotube:
[0049] 2g of TiO 2 The powder was added to 40ml of NaOH solution with a molar concentration of 9mol / L, and ultrasonically stirred for 30min to make the TiO 2 The powder is dispersed to obtain a mixed solution. Add the mixed solution into a hydrothermal reaction kettle, react at 140° C. for 40 hours, and centrifuge to obtain a precipitate. Use hydrochloric acid with a molar concentration of 0.5 mol / L to neutralize the precipitate and sonicate for 20 minutes, and then wash with deionized water until the pH of the precipitate is 6-7. The precipitate was dried in a freeze drying oven for 10 h, and then calcined in a muffle furnace at 400 °C for 5 h to obtain TiO 2 nanotube.
[0050] (2) Preparation of silver-doped TiO 2 nanotube:
[0051] 2g of TiO 2 Nanotubes were ultrasonically dispersed in 40 ml of deionized water to obtain A suspension, and 0.03 g of silver nitrate was ultrasonically dispersed in 10 ml of dimethylformamide an...
Embodiment 3
[0053] (1) Preparation of TiO 2 nanotube:
[0054] 2g of TiO 2 Add the powder into 40ml of NaOH solution with a molar concentration of 10mol / L, and stir ultrasonically for 30min to make the TiO 2 The powder is dispersed to obtain a mixed solution. Add the mixed solution into a hydrothermal reaction kettle, react at 160° C. for 24 hours, and centrifuge to obtain a precipitate. Use nitric acid with a molar concentration of 0.1 mol / L to neutralize the precipitate by ultrasonication for 20 minutes, and then wash with deionized water until the pH of the precipitate is 6-7. The precipitate was dried in a vacuum oven for 5 h, and then calcined in a muffle furnace at 500 °C for 3 h to obtain TiO 2 nanotube.
[0055] (2) Preparation of silver-doped TiO 2 nanotube:
[0056] 2g of TiO 2 Nanotubes were ultrasonically dispersed in 40 ml of deionized water to obtain A suspension, and 0.06 g of silver nitrate was ultrasonically dispersed in 20 ml of dimethylformamide and 30 ml of dei...
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