Strontium titanate-titanium dioxide composite nanotube array film and preparation method and application thereof
A nanotube array and titanium dioxide technology, which is applied in the field of semiconductor nanocomposite material preparation, can solve the problems of easy recombination of excited charges and large band gap, and achieve simple adjustment of reaction temperature and time, high selectivity, and mild synthesis process Effect
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[0024] Example 1,
[0025] Using n-butyl titanate as the titanium source precursor, concentrated hydrochloric acid as the etchant, and strontium hydroxide solution as the strontium source, a strontium titanate-titanium dioxide composite nanotube array film was prepared by a hydrothermal method. The operation steps are as follows:
[0026] (1). Prepare 36.5% hydrochloric acid and deionized water in volume ratios of 1:6, 1:4, 1:2, 1:1, 2:1, 4:1, 6:1 30mL of the mixed solution, after stirring with a magnetic stirrer for 5 minutes, add 0.6mL of n-butyl titanate to it, and after stirring for 15 minutes, a transparent and clear solution is obtained, which is used as a reaction solution for later use;
[0027] (2) Take a piece of FTO (fluorine-doped tin oxide) conductive glass and place it in an autoclave at an angle with the conductive surface facing down. Pour the reaction solution into the autoclave and put it in an oven for hydrothermal reaction at 150°C for 4 hours. After the reaction...
Example Embodiment
[0036] Example 2,
[0037] (1) After stirring 15mL of 36.5% concentrated hydrochloric acid and 15mL of deionized water with a magnetic stirrer for 5 minutes, add 0.1mL, 0.2mL, 0.4mL, 0.6mL, 0.8mL, 1.0mL of n-butyl titanate to it, respectively, After stirring for 15 minutes, a transparent and clear solution was obtained, which was used as the reaction solution for later use;
[0038] Steps (2) to (6) are the same as in Example 1;
[0039] (7) After the reaction, cool to room temperature along with the furnace, take out the porcelain boat, and obtain the strontium titanate-titania composite nanotube array film prepared by the different amount of n-butyl titanate in the reaction substrate during the first hydrothermal reaction , And keep away from light.
Example Embodiment
[0040] Example 3.
[0041] (1) After stirring 15 mL of 36.5% concentrated hydrochloric acid and 15 mL of deionized water with a magnetic stirrer for 5 minutes, 0.6 mL of n-butyl titanate was added to it, and after stirring for 15 minutes, a transparent and clear solution was obtained, which was used as a reaction solution for later use;
[0042] (2) Take a piece of FTO conductive glass and place it in an autoclave at an angle with the conductive surface facing down. Transfer all the reaction liquid into the autoclave and put it in an oven at 80℃, 120℃, 150℃, and 180℃. , 210 ℃, 240 ℃ hydrothermal reaction for 4 hours, after the completion of the reaction, take out the autoclave, naturally cool to room temperature, take out the FTO conductive glass, rinse with deionized water, and dry for later use;
[0043] Steps (3) to (6) are the same as in Example 1;
[0044] (7) After the reaction is completed, the furnace is cooled to room temperature, and the porcelain boat is taken out to obtain...
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