Preparation method of nanometer titanium dioxide

A nano-titanium dioxide, titanium dioxide technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of poor photocatalytic degradation activity, mixed crystal particle size, complex process, etc., to achieve low cost, prevent The effect of reunion and simple process

Inactive Publication Date: 2018-09-04
蒋建华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 is that the resulting mixed crystal form and uneven particle size are often obtained, because the photocatalytic degradation activity of rutile titanium dioxide and amorphous titanium dioxide is very poor

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  • Preparation method of nanometer titanium dioxide
  • Preparation method of nanometer titanium dioxide

Examples

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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 absolute ethanol, and then adding a dispersant to ultrasonically disperse until completely dissolved to obtain n-butyl titanate dispersion alcohol;

[0035] Step 2, adding the polymer surfactant into distilled water, stirring evenly until completely dissolved, to obtain a dropwise solution;

[0036] Step 3, slowly drop the dropping solution into the n-butyl titanate alcohol solution, seal and stir for 1 hour under slight heat to obtain a suspension;

[0037] Step 4, put the suspension into the reaction kettle for 1 hour of vacuum distillation reaction, after cooling, filter at low temperature to obtain a precipitate of encapsulated titanium dioxide;

[0038] Step 5, adding the encapsulated titanium dioxide precipitate into the ethanol aqueous solution for ultrasonic reaction for 10 minutes, then taking it out and drying it at high temperature to obtain na...

Embodiment 2

[0050] A preparation method of nano-titanium dioxide, comprising the steps of:

[0051] Step 1, adding n-butyl titanate to absolute ethanol, and then adding a dispersant to ultrasonically disperse until completely dissolved to obtain n-butyl titanate dispersion alcohol;

[0052] Step 2, adding the polymer surfactant into distilled water, stirring evenly until completely dissolved, to obtain a dropwise solution;

[0053] Step 3, slowly drop the dropping solution into the n-butyl titanate alcohol solution, seal and stir for 3 hours with slight heat to obtain a suspension;

[0054] Step 4, put the suspension into the reaction kettle for 3h under reduced pressure distillation reaction, after cooling, filter at low temperature to obtain the encapsulated titanium dioxide precipitate;

[0055] Step 5, adding the encapsulated titanium dioxide precipitate into the aqueous ethanol solution for ultrasonic reaction for 20 minutes, then taking it out and drying it at high temperature to obt...

Embodiment 3

[0067] A preparation method of nano-titanium dioxide, comprising the steps of:

[0068] Step 1, adding n-butyl titanate to absolute ethanol, and then adding a dispersant to ultrasonically disperse until completely dissolved to obtain n-butyl titanate dispersion alcohol;

[0069] Step 2, adding the polymer surfactant into distilled water, stirring evenly until completely dissolved, to obtain a dropwise solution;

[0070] Step 3: Slowly add the dropping solution into the n-butyl titanate alcohol solution, seal and stir for 2 hours with slight heat to obtain a suspension;

[0071] Step 4, put the suspension into the reaction kettle for 2 hours of vacuum distillation reaction, after cooling, filter at low temperature to obtain a particle-encapsulated titanium dioxide precipitate;

[0072] Step 5, add the encapsulated titanium dioxide precipitate into the aqueous ethanol solution for ultrasonic reaction for 15 minutes, then take it out and dry it at high temperature to obtain nano...

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Abstract

The invention belongs to the technical field of environment-friendly materials, and particularly relates to a preparation method of nanometer titanium dioxide. The preparation method comprises the following steps: 1, adding n-butyl titanate into absolute ethanol, then adding a dispersing agent, ultrasonically dispersing till complete dissolution to obtain n-butyl titanate alcohol dispersion; 2, adding a polymer surfactant into distilled water, uniformly stirring till complete dissolution to obtain a dropping solution; 3, slowly dropwise adding the dropping solution into the n-butyl titanate alcohol solution, sealing, slightly heating while stirring for 1-3 hours to obtain a suspension; 4, placing the suspension in a reaction kettle, performing a vacuum distillation reaction for 1-3h, cooling, then filtering at low temperature to obtain a wrapped titanium dioxide precipitate; 5, adding the wrapped titanium dioxide precipitate into an aqueous ethanol solution, performing an ultrasonic reaction for 10-20min, then taking and drying at a high temperature to obtain the nanometer titanium dioxide. Through hydrolysis of the n-butyl titanate, and by virtue of the dual action of polyvinylpyrrolidone and sodium lauryl sulfate, a good dispersion system can be formed, so that agglomeration of titanium dioxide is prevented.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a preparation method of nano titanium dioxide. Background technique [0002] TiO as one of 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 蒋建华
Owner 蒋建华
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