Preparation method of single crystal titanium dioxide thin film and evaporation rack for preparation
A titanium dioxide and thin film technology, applied in the field of inorganic nanomaterial preparation, can solve problems such as poor adhesion, easy falling off of single crystal thin films, etc., and achieve the effects of being beneficial to industrial production, beneficial to biological utilization, and reducing costs.
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[0029] The preparation method of the monocrystalline titanium dioxide thin film that the present invention adopts can comprise:
[0030] (1) pickling
[0031] First, the titanium-based metal is cleaned with pickling solution;
[0032] Here, the titanium-based metal may include titanium metal or an alloy of titanium and other metals. For example, a round titanium alloy with a diameter of 15 mm and a height of 1 mm may be subjected to surface pickling pretreatment. Specifically, the titanium-based metal may be cleaned for 0.5-5 minutes.
[0033] The pickling solution can be HF and HNO 3 mixed solution. More specifically, the pickling solution can be 66.7% pure water by volume fraction, 20% HF (mass fraction 48%) and 13.3% HNO 3 (mass fraction 48%) solutions are mixed, then diluted 5-30 times, more preferably diluted 10-15 times to obtain pickling solution. After the titanium-based metal, such as titanium alloy, is cleaned by the pickling solution for 30 seconds, it can be c...
Embodiment 1
[0044] First, measure 20ml of pure water, 6ml of 48% HF and 4ml of 48% HNO 3 , Diluted 15 times after mixing to prepare pickling solution. Take an appropriate amount of pickling solution and put it into a beaker, put the titanium alloy into it and wash it for 30 seconds, then discard the obtained light yellow-green liquid, and ultrasonically clean it three times with ultrapure water. In the second step, 120 μL of HF acid with a mass concentration of 48% and 60 mL of pure water were placed in a 100 mL polytetrafluoroethylene evaporating kettle, and a custom-made polytetrafluoroethylene evaporation rack was placed in the dilute acid solution; the cleaned titanium Put the alloy on the tray of the polytetrafluoroethylene evaporation rack, add 5mL of pure water to immerse the titanium alloy, and carry out the dilute acid wet steaming treatment at 180°C for 0.5 hours (180°C / 0.5h). After the treatment, it was ultrasonically cleaned with ultrapure water for 10 minutes, and then dried...
Embodiment 2
[0046] The titanium alloy was pre-cleaned and acid steamed by the method in Example 1, except that dilute acid wet steaming (180° C. / 1 h) was performed. figure 2 B is the topography of the titanium dioxide film formed on the surface of the titanium alloy treated at 180℃ / 1h. It can be seen from the figure that the treated topography and figure 2 A is different, forming nanoparticles with very small crystal faces.
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