Preparation method of nano-TiO2

A nano-titanium dioxide and titanium alcohol technology, applied in the field of nanomaterials, can solve the problems of large particle size change of titanium dioxide, unstable photocatalytic performance, complex process, etc., so as to reduce environmental pollution and environmental protection treatment pressure, and improve the possibility of recycling. , the effect of simple process

Active Publication Date: 2018-10-02
绍兴市秀臻新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation methods of titanium dioxide powder, such as traditional solid-state reaction and sintering method and modern chemical vapor deposition method, physical vapor deposition method, chemical vapor infiltration method, sol-gel method, etc., these methods have complex processes, The disadvantage of high cost, while the particle size of titanium dioxide varies greatly, and the photocatalytic performance is unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of nano-titanium dioxide, comprising the steps of:

[0035] Step 1, adding n-butyl titanate to absolute ethanol and ultrasonically dispersing for 20 minutes to obtain titanium alcohol solution;

[0036] Step 2, adding polyvinylpyrrolidone into the titanium alcohol solution and stirring until it is completely dissolved, then sealing and ultrasonically reacting for 1 hour to obtain a titanium alcohol dispersion;

[0037] Step 3, adding methyl cellulose to water and stirring at constant temperature until completely dissolved to obtain a dispersed aqueous solution;

[0038] Step 4, slowly drop the dispersed aqueous solution into the titanium alcohol dispersion liquid for ultrasonic reaction for 2 hours to obtain a mixed slightly turbid liquid;

[0039] Step 5, adding the mixed slightly turbid liquid into the reaction kettle and stirring at a constant temperature until gelation, then filtering while hot and washing with absolute ethanol at a constant te...

Embodiment 2

[0051] A preparation method of nano-titanium dioxide, comprising the steps of:

[0052] Step 1, adding n-butyl titanate to absolute ethanol and ultrasonically dispersing for 40 minutes to obtain titanium alcohol solution;

[0053] Step 2, adding polyvinylpyrrolidone into the titanium alcohol solution and stirring until it is completely dissolved, then sealing and ultrasonically reacting for 3 hours to obtain a titanium alcohol dispersion;

[0054] Step 3, adding methyl cellulose to water and stirring at constant temperature until completely dissolved to obtain a dispersed aqueous solution;

[0055] Step 4, slowly drop the dispersed aqueous solution into the titanium alcohol dispersion liquid for ultrasonic reaction for 4 hours to obtain a mixed slightly turbid liquid;

[0056] Step 5, adding the mixed slightly turbid liquid into the reaction kettle and stirring at a constant temperature until gelation, then filtering while hot and washing with absolute ethanol at a constant t...

Embodiment 3

[0068] A preparation method of nano-titanium dioxide, comprising the steps of:

[0069] Step 1, adding n-butyl titanate to absolute ethanol and ultrasonically dispersing for 30 minutes to obtain titanium alcohol solution;

[0070] Step 2, adding polyvinylpyrrolidone into the titanium alcohol solution and stirring until it is completely dissolved, then sealing and ultrasonically reacting for 2 hours to obtain a titanium alcohol dispersion;

[0071] Step 3, adding methyl cellulose to water and stirring at constant temperature until completely dissolved to obtain a dispersed aqueous solution;

[0072] Step 4, slowly drop the dispersed aqueous solution into the titanium alcohol dispersion liquid for ultrasonic reaction for 3 hours to obtain a mixed slightly turbid liquid;

[0073] Step 5, adding the mixed slightly turbid liquid into the reaction kettle and stirring at a constant temperature until gelation, then filtering while hot and washing with absolute ethanol at a constant t...

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PUM

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Abstract

The invention belongs to the technical field of nano materials and particularly relates to a preparation method of nano-TiO2. The preparation method comprises steps as follows: step 1, N-butyl titanate is added to absolute ethanol and ultrasonically dispersed for 20-40 min, and a Ti alcohol solution is obtained; step 2, polyvinylpyrrolidone is added to the Ti alcohol solution and stirred until polyvinylpyrrolidone is completely dissolved, then sealed ultrasonic reaction is performed for 1-3 h, and a Ti alcohol dispersion is obtained; step 3, methylcellulose is added to water and stirred at constant temperature until methylcellulose is completely dissolved, and a dispersed aqueous solution is obtained; step 4, the dispersed aqueous solution is slowly dropwise added to the Ti alcohol dispersion and subjected to the ultrasonic reaction for 2-4 h, and a mixed slightly-turbid solution is obtained; step 5, the mixed slightly-turbid solution is added to a reaction kettle and stirred at the constant temperature to be gelatinized, a product is filtered while still hot and washed by absolute ethanol at the constant temperature, and gel is obtained; step 6, the gel is placed in aqueous ethanol, subjected to the ultrasonic reaction for 1-3 h and filtered, then ultraviolet light activation is performed, and nano-TiO2 is obtained.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of titanium dioxide. Background technique [0002] TiO is currently used as one of the semiconductor photocatalysts 2 Photocatalytic materials are currently the most researched new type of environmentally friendly materials, and the properties of photocatalysts are the key factors in the photocatalytic oxidation process. TiO 2 The crystal form, grain size and particle diameter, surface state and other factors have a great influence on its photocatalytic performance. Nanoparticles with large surface area have good catalytic activity and selectivity due to their surface effect and volume effect. Nano-TiO 2 Due to its quantum size effect, the conduction band and valence band energy levels become discrete energy levels, the energy gap widens, the conduction band potential becomes more negative, and the valence band potential becomes more pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCB82Y40/00C01G23/053C01P2004/62
Inventor 吴亚良
Owner 绍兴市秀臻新能源科技有限公司
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