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Preparation method of titanium dioxide/titanium oxydifluoride composite gas-phase photocatalyst

A technology of titanyl difluoride and titanium dioxide, which is applied in the field of synthesis of photocatalytic materials, can solve problems such as complex preparation methods, and achieve the effects of simple synthesis methods, enriched pore structure, and reduced recombination probability

Inactive Publication Date: 2018-10-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the performance of the current titanium dioxide gas-phase photocatalytic material needs to be improved, and the preparation method is relatively complicated, which can no longer meet the needs of the existing industry.

Method used

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Effect test

Embodiment 1

[0034] (1) Take 4mL of toluene and pour it into a polytetrafluoroethylene reactor, add 2mL of hydrofluoric acid to it, and stir at a constant speed of 1500r / min for 10min.

[0035] (2) After 10 minutes, add 25 mL of tetrabutyl titanate to the solution obtained in (1), and stir uniformly at 1500 r / min for 20 minutes.

[0036] (3) After the stirring is completed, take out the magnets in the reaction kettle, encapsulate the reaction kettle, and put it in a blast drying box, set the temperature to 180°C, and keep the reaction for 24 hours.

[0037] (4) Take out the reaction kettle from the blast drying box, remove the liquid by centrifugation, and obtain a blue solid product. Clean the product with absolute ethanol. Centrifuge the product at 8000r / min for 10min. Repeat this step to clean the product three times. Put it in an oven at 40°C and dry it to obtain the titanium dioxide / titanium oxyfluoride composite gas-phase photocatalyst.

[0038] (5) Disperse 10 mg of the above product in 2 m...

Embodiment 2

[0044] (1) Take 4mL of toluene and pour it into a polytetrafluoroethylene reactor, add 2mL of hydrofluoric acid to it, and stir at a constant speed of 1500r / min for 10min.

[0045] (2) After 10 minutes, add 25 mL of tetrabutyl titanate to the solution obtained in (1), and stir uniformly at 1000 r / min for 20 minutes.

[0046] (3) After the stirring is completed, take out the magnets from the reaction kettle, encapsulate the reaction kettle, and put it in a blast drying oven, set the temperature to 200° C., and keep it warm for 6 hours.

[0047] (4) Take out the reaction kettle from the blast drying box, remove the liquid by centrifugation, and obtain a blue solid product. Clean the product with absolute ethanol. Centrifuge the product at 8000r / min for 10min. Repeat this step to clean the product three times. Put it in an oven at 40°C and dry it to obtain the titanium dioxide / titanium oxyfluoride composite gas-phase photocatalyst.

[0048] (5) Disperse 10 mg of the above product in 2 mL...

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Abstract

The invention relates to a preparation method of a titanium dioxide / titanium oxydifluoride composite gas-phase photocatalyst. The preparation method includes the steps: first, uniformly stirring and mixing hydrofluoric acid and methylbenzene according to the volume ratio of 1:(0.4-2.5); second, adding a titanium source into solution obtained in the first step, and uniformly stirring and mixing thesolution and the titanium source; third, placing reaction liquid obtained in the second step under the condition of 180-200 DEG C and performing reaction for 1-24 hours; fourth, performing post-treatment on a product obtained in the third step to obtain the titanium dioxide / titanium oxydifluoride composite gas-phase photocatalyst. The proportion of the titanium source to the hydrofluoric acid is25g:(1-4)mL. The microstructure of the titanium dioxide / titanium oxydifluoride composite gas-phase photocatalyst is a porous hierarchical structure micro-sphere comprising nano-sheets and is an anatase titanium dioxide / titanium oxydifluoride composite phase structure. The photocatalyst has excellent gas-phase photocatalytic performances, can be recycled and has important application values in terms of removal of VOC (volatile organic compounds).

Description

Technical field [0001] The invention relates to the technical field of photocatalytic material synthesis, in particular to a method for preparing a titanium dioxide / titanium oxyfluoride composite gas-phase photocatalyst. Background technique [0002] Titanium dioxide is an important semiconductor material with its unique physical and chemical properties, so it has a wide range of application prospects in the fields of photocatalysis, solar cells, lithium-ion batteries, etc., and has attracted widespread attention. Studies have shown that titanium dioxide, as a photocatalyst, plays a very good role in purifying the air, degrading volatile organic compounds, and treating water pollution and air pollution. [0003] However, during the reaction, the recombination of electron-hole pairs severely reduces the efficiency of titanium dioxide photocatalysis, so how to improve the efficiency of electron-hole separation becomes an urgent problem to be solved. There are three main ways to impr...

Claims

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Application Information

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IPC IPC(8): B01J27/135B01J35/10B01J37/10B82Y30/00B82Y40/00B01D53/86B01D53/44
CPCB01D53/007B01D53/8687B82Y30/00B82Y40/00B01J27/135B01J37/10B01D2257/708B01J35/39B01J35/613B01J35/647B01J35/651Y02C20/30Y02A50/20
Inventor 阳晓宇胡洁张凌瑞李元洲袁浩桢苏宝连
Owner WUHAN UNIV OF TECH
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