Preparation method of photocatalytic titanium dioxide/tungsten oxide composite film
A technology of titanium dioxide and composite thin films, which is applied in the field of titanium dioxide/tungsten oxide composite thin films, can solve the problems of inability to combine other materials and decrease in photocatalytic efficiency, and achieve the effects of fast film growth, simple preparation process and high photocatalytic activity
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Embodiment 1
[0022] 1. Dissolve 5.6g of silicotungstic acid in 2L of distilled water to obtain an electrolyte.
[0023] 2. After polishing the pure titanium sheet workpiece with sandpaper, clean the surface with water, then put it into the electrolyte solution in step 1 as the anode, connect the cathode to the stainless steel barrel of the counter electrode, and connect the current density to 6A / dm 2 , DC power supply with continuously adjustable output voltage of 100-1000V, high-voltage anodic oxidation treatment, the electrolyte temperature is kept below 30°C through the cooling water system during the treatment process, when the oxidation reaches 250V, immediately turn off the power to stop oxidation, at this time The oxidation time is about 10 seconds. After the power supply voltage has completely returned to zero, take out the workpiece, wash it with tap water, and dry it naturally. The naked eye can see a layer of blue film growing on the surface of the titanium sheet, and it can be...
Embodiment 2
[0025] 1. Dissolve 100g of silicotungstic acid in 20L of distilled water to obtain an electrolyte.
[0026] 2. After grinding the 7 pure titanium sheet workpieces with sandpaper, clean the surface with water, and then put them into 2L of the electrolyte in step 1 as anodes, and connect the cathodes to the copper sheets of the counter electrode, and the connection current density is 6.5A / dm 2 , The pulse power supply with a pulse frequency of 100Hz, a duty cycle of 40%, and a continuously adjustable output voltage of 100-600V is used for high-voltage anodizing treatment. During the treatment, the temperature of the electrolyte is kept below 30°C through the cooling water system. When the oxidation reaches 200, 225, 250, 275, 300, 325, 350V, turn off the power immediately to stop the oxidation, and the oxidation time is distributed between 12 seconds and 18 seconds. After the power supply voltage has completely returned to zero, take out the workpiece, wash it with tap water, an...
Embodiment 3
[0029] 1. Dissolve 40g of sodium tungstate and 100g of potassium hydroxide in 20L of distilled water to obtain an electrolyte.
[0030] 2. After polishing the 7 pure titanium sheet workpieces with sandpaper, clean the surface with water, and then put them into 2L of the electrolyte in step 1 as the anode, and connect the cathode to the stainless steel barrel of the counter electrode, and the connection current density is 4A / dm 2 , Pulse frequency 100Hz, duty cycle 40%, output voltage 100-600V continuously adjustable pulse power supply, high-voltage anodic oxidation treatment, the temperature of the electrolyte is kept below 30 ℃ through the cooling water system during the treatment process, when respectively When the oxidation reaches 200, 225, 250, 275, 300, 325, 350V, immediately turn off the power to stop the oxidation. After the power supply voltage has completely returned to zero, take out the workpiece, wash it with tap water, and dry it naturally. The experimental resu...
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