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A kind of anatase titanium dioxide microsphere and preparation method thereof
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A technology of titanium dioxide and anatase, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of complex semiconductor recombination steps
Inactive Publication Date: 2021-02-19
WUHAN UNIV OF TECH
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The compound steps of noble metal doping and semiconductor are more complicated
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Embodiment 1
[0031] A kind of green synthetic method of anatase type nano-titanium dioxide, comprises the following steps:
[0032] (1) Add 20mL of ethanol as a solvent in the reaction kettle, add 24μL of diethylenetriamine, then add 1mL of 1-butyl-3-methylimidazolium tetrafluoroborate, and then stir on a magnetic stirrer After stirring for 10-15 minutes, add 2 mL of titanium source isopropyl titanate while stirring, continue stirring for 5-10 minutes after the addition, and finally put it in an oven at 200° C. for 24 hours.
[0033] (2) After stopping the reaction, take out the reaction solution, centrifuge to obtain the precipitate, wash the precipitate three times with ethanol, then put the precipitate in a 70°C oven and dry it for 24 hours, then grind the dried sample into powder and put it into a horse In the Furnace, the temperature was raised to 600°C at a rate of 3°C / min, and then kept for 4 hours to obtain a titanium dioxide sample.
[0034] figure 1 and figure 2 TiO prepared ...
Embodiment 2
[0036] Anatase titanium dioxide microspheres were prepared by a method similar to that of Example 1, except that the amount of ethanol was 30 mL.
[0037] TiO prepared in this embodiment 2 The SEM picture is as follows image 3 As shown, the average particle size of visible microspheres is 2 μm, and the average particle size of nanoparticles is 18 nm.
Embodiment 3
[0039] Anatase titanium dioxide microspheres were prepared by a method similar to that of Example 1, except that the amount of ethanol was 35 mL.
[0040] TiO prepared in this embodiment 2 The SEM picture is as follows Figure 4 As shown, the average particle size of visible microspheres is 2 μm, and the average particle size of nanoparticles is 22 nm.
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Abstract
The invention relates to an anatase titanium dioxide microsphere and a preparation method thereof. The anatase titanium dioxide microsphere has a uniform particle size with an average particle size of 1-2 μm, and the microspheres are assembled from nanoparticles with an average particle size of 10-25 nm. , and the size of nanoparticles is adjustable. Its preparation method is as follows: use isopropyl titanate as silicon source, ethanol as solvent, diethylenetriamine as end-capping agent, fluorine-containing ionic liquid and ethanol as morphology regulators to prepare TiO by solvothermal reaction 2 Microspheres, TiO 2 The microspheres are dried, ground and calcined to obtain the anatase titanium dioxide microspheres. In the present invention, ethanol is used as a solvent, and ethanol and fluorine-containing ionic liquid are simultaneously used as a shape regulator to prepare anatase titanium dioxide nanoparticles with high-energy surfaces through solvothermal reaction, and the shape can be controlled by adjusting the amount of ethanol.
Description
technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to an anatase titanium dioxide microsphere and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution are two major problems facing mankind today. Since 1972 Ti0 2 After the discovery of photocatalytic decomposition of water on the electrode to produce hydrogen, the application of photocatalytic technology in deep oxidation and degradation of various organic pollutants, reduction of toxic ions of heavy metals, antibacterial, antivirus, antibiotic, and energy conversion has gradually become a research hotspot. Currently, TiO 2 The photocatalytic technology based on photocatalysis has made great progress and extensive application research in the fields of dielectric effect, photochromism, gas sensitivity, humidity sensitivity, surface self-cleaning and environmental governance. [0003] As a semiconductor materi...
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