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Preparation method of nano titanium dioxide
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A technology of nano-titanium dioxide and titanium alcohol, which is applied in the field of nano-materials, can solve the problems of poor powder activity and complex process, and achieve the effects of increasing productivity, reducing complexity, and reducing costs
Active Publication Date: 2019-02-12
SHAOXING UNIVERSITY
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[0006] In order to achieve the above technical objectives, the technical solution of the present invention is: a preparation method of nano-titanium dioxide, which solves the problems of poor activity and complicated process of existing nano-titanium dioxide powder, and prepares the particle size by ultrasonic wrapping and depressurization gasification. Nano titanium dioxide with uniform distribution and high activity
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Embodiment 1
[0033] A preparation method of nano-titanium dioxide, comprising the steps of:
[0034] Step 1, adding n-butyl titanate to glycerin and ultrasonically dispersing for 30 minutes to obtain titanium alcohol solution;
[0035] Step 2, adding polyvinylpyrrolidone to the titanium alcohol solution and continuing to sonicate for 2 hours to obtain a coating dispersion;
[0036] Step 3, adding the coating dispersion liquid into the sealed reaction kettle and ultrasonicating for 10 minutes, then rapidly cooling to solidification to obtain a dispersed solidmass;
[0037] Step 4, the dispersed solid mass is subjected to a low-temperature two-gradient decompression reaction for 2 hours, and then adding water vapor to circulate the reaction for 2-3 hours, and deposit to obtain a white precipitate;
[0038] In step 5, the white precipitate is subjected to a constant temperature ultraviolet light reaction for 2 hours, and the nano-titanium dioxide material is obtained after cooling.
[0039...
Embodiment 2
[0048] A preparation method of nano-titanium dioxide, comprising the steps of:
[0049] Step 1, adding n-butyl titanate to glycerin and ultrasonically dispersing for 60 minutes to obtain titanium alcohol solution;
[0050] Step 2, adding polyvinylpyrrolidone into the titanium alcohol solution and continuing to sonicate for 4 hours to obtain a coating dispersion;
[0051] Step 3, adding the coating dispersion liquid into the sealed reaction kettle and ultrasonicating for 15 minutes, then rapidly cooling to solidification to obtain a dispersed solid mass;
[0052] Step 4, the dispersed solid mass was subjected to a low-temperature two-gradient decompression reaction for 5 hours, and then added water vapor to circulate the reaction for 3 hours, and deposited to obtain a white precipitate;
[0053] In step 5, the white precipitate is subjected to a constant temperature ultraviolet light reaction for 4 hours, and the nano-titanium dioxide material is obtained after cooling.
[0054...
Embodiment 3
[0062] A preparation method of nano-titanium dioxide, comprising the steps of:
[0063] Step 1, adding n-butyl titanate to glycerin and ultrasonically dispersing for 50 minutes to obtain titanium alcohol solution;
[0064] Step 2, adding polyvinylpyrrolidone to the titanium alcohol solution and continuing to sonicate for 3 hours to obtain a coating dispersion;
[0065] Step 3, adding the coating dispersion liquid into the sealed reaction kettle and ultrasonicating for 13 minutes, then rapidly cooling to solidification to obtain a dispersed solid mass;
[0066] Step 4, the dispersed solid mass was subjected to a low-temperature two-gradient decompression reaction for 4 hours, and then added water vapor to circulate the reaction for 3 hours, and deposited to obtain a white precipitate;
[0067] In step 5, the white precipitate is subjected to a constant temperature ultraviolet light reaction for 3 hours, and the nano-titanium dioxide material is obtained after cooling.
[0068...
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Abstract
The invention belongs to the technical field of nano materials and in particular relates to a preparation method of nano titanium dioxide. The preparation method comprises the following steps: step 1,adding tetrabutyl titanate into glycerol and carrying out ultrasonic dispersion for 30 to 60 min to obtain a titaniumalcohol solution; step 2, adding polyvinylpyrrolidone into the titaniumalcohol solution and continually carrying out ultrasonic treatment for 2 to 4 h to obtain a covered dispersion solution; step 3, adding the covered dispersion solution into a sealed reaction kettle and carrying out ultrasonic treatment for 10 to 15 min; then rapidly cooling until the solution is solidified, so as to obtain a dispersion solid; step 4, carrying out low-temperature two-gradient decompressionreaction on the dispersion solid for 2 to 5 h; then adding water steam and carrying out circular reaction for 2 to 3 h; depositing to obtain white precipitate; step 5, carrying out constant-temperature ultrasonic illumination reaction on the white precipitate for 2 to 4 h; cooling to obtain a nano titanium dioxide material. According to the preparation method provided by the invention, the problems of existing nano titanium dioxidepowder that the activity is poor, the technology is complicated and the like are solved; the nano titanium dioxide with uniform grain diameter distribution and highactivity is prepared through an ultrasonic covering and depressurization and gasification manner.
Description
technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of nanometer titanium dioxide. Background technique [0002] Nano-titanium dioxide material is a functional nanomaterial that has developed rapidly in recent years. In addition to the unique surface effect, small size effect, quantum effect and macroscopic quantum tunneling effect of nanomaterials, it has been confirmed to have excellent photocatalytic activity, Chemical stability, thermal stability, superhydrophilicity, non-migration and non-toxicity and other multiple characteristics, so it can be used as functional materials such as anti-ultraviolet materials and photocatalysts, and is widely used in textiles, coatings, inks, sunscreens, Food packaging materials, paper making, lithium batteries, self-cleaning glass / substrate and other industries. In the application of nano-titanium dioxide materials as raw materials, according to p...
Claims
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Application Information
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