Preparation method and application of gadolinium-modified photocatalytic titanium dioxide nanotube array
A nanotube array and titanium dioxide technology, applied in the field of nanomaterials, can solve the problems of reduced photocatalytic performance, low utilization rate of light source, small spectral response range, etc., and achieve excellent photocatalytic performance, shorten the reaction process, and compact and neat appearance Effect
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Embodiment 1
[0030] Use sandpaper to polish the high-purity titanium sheet for physical polishing, and place the polished titanium sheet in acetone, absolute ethanol, and deionized water for ultrasonic cleaning for 15 minutes; 1:2:5 was configured as a chemical polishing solution, and the ultrasonic titanium sheet was placed in the polishing solution for 30s to react for chemical polishing; finally, the titanium sheet was placed in acetone again for 3 minutes of ultrasonication, and anhydrous ethanol, pure Wash it repeatedly with water, and then dry it in a drying oven for later use.
[0031] Configure the ethylene glycol solution of ammonium fluoride as the electrolyte, specifically 0.1mol / L NH 4 F, deionized water and ethylene glycol with a volume fraction of 10%. according to figure 1 The schematic diagram of the anodic oxidation reaction is shown to build the experimental device. The high-purity titanium sheet is placed on the anode and oxidized at 35V in the electrolyte for 1h; the ...
Embodiment 2
[0034] Compared with Example 1, the difference of this example is that NH 4 The concentration of F is 0.05mol / L, the reaction voltage is 45V, the temperature of the second oxidation reaction is 30°C, the concentration of gadolinium nitrate solution is 0.1mol / L, and the rest are exactly the same. See the attached table for the photodegradation rate and optical contact angle data.
Embodiment 3
[0036] Compared with Example 1, the difference of this example is that NH 4 The concentration of F is 0.2mol / L, the reaction voltage is 55V, the temperature of the second oxidation reaction is 35°C, the annealing temperature is 550°C, the concentration of gadolinium nitrate solution is 0.2mol / L, and the rest are exactly the same. , Acid scarlet, methylene blue solution photodegradation rate and optical contact angle data are shown in the attached table.
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