A kind of tio2 nanotube array photoanode and preparation method thereof
A nanotube array and photoanode technology, applied in the field of solar cells, can solve the problems of low light collection efficiency, long time consumption, and high cost
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Embodiment 1
[0035] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 70±4nm, the tube wall is 20±2nm, and the tube length is 1.946um. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.
[0036] The preparation process of this embodiment is as follows:
[0037] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.
[0038] Step 2, preparing electrolyte: the electrolyte is ammonium fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:
[0039] The ammonium fluoride electrolyte is made up of 0.25wt% ammonium fluoride, 2.5vol% deionized water...
Embodiment 2
[0046] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 100±10nm, the tube wall is 20±4nm, and the tube length is 450±30nm. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.
[0047] The preparation process of this embodiment is as follows:
[0048] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.
[0049] Step 2, prepare electrolyte: electrolyte is hydrogen fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:
[0050] Hydrogen fluoride electrolyte is made of 0.1mol L -1 Hydrogen fluoride and 2.0mol·L -1mixed solutio...
Embodiment 3
[0057] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 70±4nm, the tube wall is 20±2nm, and the tube length is 1.946um. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.
[0058] The preparation process of this embodiment is as follows:
[0059] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.
[0060] Step 2, preparing electrolyte: the electrolyte is ammonium fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:
[0061] The ammonium fluoride electrolyte is made up of 0.25wt% ammonium fluoride, 2.5vol% deionized water...
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