Anatase titanium dioxide nano-rods and preparation method thereof
A technology of titanium dioxide and nano-titanium dioxide is applied in the field of nanomaterials, which can solve the problems of difficult electron collection efficiency of electrode materials, limited performance of photoelectrochemical devices, lack of size and microscopic morphology, etc., and achieves easy control of process parameters and high electron collection efficiency. , the effect of low production cost
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example 1
[0039] Fully mix 10mmol of isopropyl titanate with a small amount of ethylene glycol, slowly add the mixed solution to the mixed solution of ethylene glycol-water-ethanol containing 1.79ml tetrabutylammonium hydroxide solution, and finally keep the ethylene glycol in the reaction precursor The volume ratio of alcohol:water:ethanol is 15:1:14. Reflux with magnetic stirring for 1 hour under the condition of an oil bath at 85° C. until the reaction solution becomes completely clear. Then the reaction solution was transferred to a polytetrafluoroethylene hydrothermal kettle with a capacity of 100ml, reacted in an oven at 230°C for 24 hours, cooled to room temperature, centrifuged at 10,000 rpm, and washed 5 times with water and ethanol repeatedly. The coated film of the ethanol-wetted product was placed on a glass substrate, dried at 100°C for 30 minutes, and then heat-treated at 450°C for 1 hour. The specific surface area of the product is 144.8m 2 / g, the product morphology is...
example 2
[0041] The specific process is the same as that in Example 1, except that the volume ratio of ethylene glycol:water:ethanol in the reaction precursor is finally kept at 1:1:0. The specific surface area of the product is 105.5m 2 / g, the product morphology is as Figure 5 As shown, it shows that the aspect ratio or the orientation bonding growth mode can be controlled by adjusting the solvent ratio.
example 3
[0043] Fully mix 30mmol isopropyl titanate with a small amount of ethylene glycol, slowly add the mixed solution to the mixed solution of ethylene glycol-water containing 4.47ml tetramethylammonium hydroxide solution, and finally keep the ethylene glycol in the reaction precursor The volume ratio of alcohol:water is 1:1. Under the condition of an oil bath at 85° C., the mixture was magnetically stirred and refluxed for 3 hours until the reaction liquid became completely clear. Then the reaction solution was transferred to a polytetrafluoroethylene hydrothermal kettle with a capacity of 100ml, reacted in an oven at 230°C for 24 hours, cooled to room temperature, centrifuged at 8000 rpm, and washed repeatedly with water and ethanol for 5 times. The coated film of the ethanol-wetted product was placed on a glass substrate, dried at 100°C for 30 minutes, and then heat-treated at 450°C for 1 hour. The specific surface area of the product is 57.0m 2 / g, the product morphology is...
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