Preparation method of high-activity platinum-loaded TiO2 nanotube photocatalyst
A photocatalyst and nanotube technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as reducing catalyst adsorption and ultraviolet light absorption, and avoid bed effects and photocatalytic efficiency. Improve and improve the effect of photon quantum efficiency
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[0014] Highly active platinum-loaded TiO of the present invention 2 The preparation method of the nanotube photocatalyst is the anatase TiO 2 On the basis of nanotubes, a light reduction deposition method is used to selectively deposit precious metal platinum on the inner surface of the nanotubes to obtain platinum-carrying TiO with higher photocatalytic activity 2 Nanotube photocatalyst, namely platinum-loaded TiO 2 The nanotube photocatalyst is in anatase TiO 2 A highly efficient photocatalyst made by depositing platinum on the inner surface of nanotubes. Of which anatase TiO 2 Nanotubes are synthesized by hydrothermal method, and an intermittent milling step is introduced in the hydrothermal synthesis process to obtain high purity TiO 2 Nanotubes, the nanotubes are roasted to obtain anatase TiO 2 Nanotube; TiO 2 The platinum on the inner surface of the nanotube is prepared by the photoreduction deposition method. It mainly includes the following steps:
[0015] (1) Add 1~10g Ti...
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[0021] Example 1
[0022] Weigh 1gTiO 2 Powder, add 40mL of 10mol / L NaOH solution, hydrothermally react in the reactor at 150℃ for 5h, then cool to room temperature, grind the solid matter in the reactor, and continue to react for 48h at the same temperature to obtain After cooling the sample, adjust the pH value of the mixed solution to 2.5 with hydrochloric acid, stir and pickle for 3 hours, wash with distilled water to neutrality and dry, and then roast it at 500°C for 5 hours (heating rate: 1°C / min) to obtain Anatase TiO 2 nanotube.
[0023] Anatase TiO 2 Nanotube is the matrix, add chloroplatinic acid, stir to make it evenly adsorb on TiO 2 The inner and outer surfaces of the nanotubes are then washed with distilled water to remove the chloroplatinic acid adsorbed on the outer surface of the nanotubes, and the amount of platinum on the inner surface of the nanotubes is controlled to 0.57%, and then dried to obtain platinum-loaded TiO 2 Nanotube precursors. Weigh 0.5g of plati...
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[0026] Example 2
[0027] In Example 1, other conditions remain unchanged, the hydrothermal reaction temperature is changed to 110°C, and the resulting platinum-loaded TiO 2 The removal rate of the nanotube photocatalyst to the rhodamine B solution was lower than that of Example 1.
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