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Preparation method of high-performance titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of weak chemical stability and poor activity, and achieve improved photocatalytic activity and charge mobility, good photocatalytic degradation efficiency, good photocatalytic activity and photocatalytic stability sexual effect

Inactive Publication Date: 2018-12-14
蒋黎婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing a high-performance titanium dioxide photocatalyst, which solves the problems of weak chemical stability and poor activity of the existing photocatalyst, and forms a composite photocatalyst of tourmaline powder and titanium dioxide, which has good photocatalytic activity and photocatalytic stability

Method used

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  • Preparation method of high-performance titanium dioxide photocatalyst

Examples

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Effect test

Embodiment 1

[0033] A kind of preparation method of high-performance titanium dioxide photocatalyst, comprises the steps:

[0034] Step 1, adding n-butyl titanate to absolute ethanol, then adding polyvinylpyrrolidone, and ultrasonically dispersing to obtain a titanium alcohol dispersion;

[0035] Step 2, adding the titanic acid dispersion into a vacuum reaction kettle for vacuum distillation for 60 minutes to obtain a titanium slurry;

[0036] Step 3, adding tourmaline powder into the titanium slurry and stirring evenly, then adding it to a ball milling reactor for constant temperature ball milling for 20 minutes to obtain a mixed dry powder;

[0037] Step 4, adding the mixed dry powder into the reaction kettle to pressurize and keep the temperature for 1 hour, and then quickly release the pressure and lower the temperature to obtain the prefabricated powder;

[0038] In step 5, the prefabricated powder is added to absolute ethanol for washing, filtered and then dried to obtain a high-per...

Embodiment 2

[0049] A kind of preparation method of high-performance titanium dioxide photocatalyst, comprises the steps:

[0050] Step 1, adding n-butyl titanate to absolute ethanol, then adding polyvinylpyrrolidone, and ultrasonically dispersing to obtain a titanium alcohol dispersion;

[0051] Step 2, adding the titanic acid dispersion into a vacuum reactor for vacuum distillation for 90 minutes to obtain a titanium slurry;

[0052] Step 3, adding tourmaline powder into the titanium slurry and stirring evenly, then adding it into a ball milling reactor for constant temperature ball milling for 30 minutes to obtain a mixed dry powder;

[0053] Step 4, adding the mixed dry powder into the reaction kettle to pressurize and keep the temperature for 3 hours, and then quickly release the pressure and lower the temperature to obtain the prefabricated powder;

[0054] In step 5, the prefabricated powder is added to absolute ethanol for washing, filtered and then dried to obtain a high-performa...

Embodiment 3

[0065] A kind of preparation method of high-performance titanium dioxide photocatalyst, comprises the steps:

[0066] Step 1, adding n-butyl titanate to absolute ethanol, then adding polyvinylpyrrolidone, and ultrasonically dispersing to obtain a titanium alcohol dispersion;

[0067] Step 2, adding the titanic acid dispersion into a vacuum reaction kettle for vacuum distillation for 80 minutes to obtain a titanium slurry;

[0068] Step 3, adding tourmaline powder into the titanium slurry and stirring evenly, then adding it into a ball milling reactor for constant temperature ball milling for 25 minutes to obtain a mixed dry powder;

[0069] Step 4, adding the mixed dry powder into the reaction kettle to pressurize and keep the temperature for 2 hours, and then quickly release the pressure and lower the temperature to obtain the prefabricated powder;

[0070] In step 5, the prefabricated powder is added to absolute ethanol for washing, filtered and then dried to obtain a high-...

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Abstract

The invention particularly relates to a preparation method of a high-performance titanium dioxide photocatalyst. The preparation method comprises the following steps: step 1, adding n-butyl titanate into absolute ethyl alcohol, then adding polyvinylpyrrolidone, and carrying out ultrasonic dispersion to obtain a titanium alcohol dispersion liquid; step 2, adding the titanium alcohol dispersion liquid into a reduced pressure reaction kettle, and carrying out reduced pressure distillation for 60-90 minutes to obtain titanium slurry; step 3, adding tourmaline powder into the titanium slurry, uniformly carrying out stirring, then adding the mixture into a ball milling reaction kettle, and carrying out constant-temperature ball milling for 20-30 minutes to obtain mixed dry powder; step 4, addingthe mixed dry powder into a reaction kettle, carrying out a pressurized constant-temperature reaction for 1-3 hours, and then rapidly releasing pressure and carrying out cooling to obtain prefabricated powder; and step 5, washing the prefabricated powder in absolute ethyl alcohol, and carrying out filtering and drying to obtain the high-performance titanium dioxide photocatalyst. The invention solves the problems of weak chemical stability and poor activity of existing photocatalysts, and the composite photocatalyst of tourmaline powder and titanium dioxide is formed, and the composite photocatalyst has good photocatalytic activity and photocatalytic stability.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method of a high-performance titanium dioxide photocatalyst. Background technique [0002] Since the 21st century, with the improvement of the pace of industrialization and the excessive use of natural resources, various environmental pollution and energy scarcity problems have continued to intensify. Therefore, it is imminent to control all kinds of pollution and find new energy sources to relieve the pressure on the earth. Photocatalytic technology has been widely used in many fields such as wastewater treatment, gas purification, sterilization, antifouling, self-cleaning materials, dye-sensitized solar cells, cosmetics, and gas sensors. Photocatalysis is based on the basic characteristics of semiconductor materials that can generate photogenerated electrons with strong reductivity and holes with strong oxidative properties under light excitati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22
CPCB01J27/22B01J35/39
Inventor 不公告发明人
Owner 蒋黎婷
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