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A kind of preparation method of anatase titanium dioxide/carbon composite material

A carbon composite material, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc. Achieve the effects of catalytic efficiency, low photogenerated electron-hole recombination rate, and short preparation time

Active Publication Date: 2019-10-29
浙江妙舍沁香科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although hydrothermal or solvothermal re-drying or heat treatment to prepare carbon-doped titanium dioxide materials can greatly shorten the preparation time, avoid long-term high-temperature calcination, and achieve high crystallinity; however, it is necessary to add a variety of reagents and other substances As a carbon source, the process is complicated, the preparation is cumbersome, and the scale-up of industrial production has a great impact, so it is not easy to promote large-scale production

Method used

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  • A kind of preparation method of anatase titanium dioxide/carbon composite material
  • A kind of preparation method of anatase titanium dioxide/carbon composite material
  • A kind of preparation method of anatase titanium dioxide/carbon composite material

Examples

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Effect test

Embodiment 1

[0030] First benzyl alcohol and ethanol are mixed with 1:8 volume ratio to be mixed with 60ml di-alcohol solvent, stir 10 minutes, mix evenly; Add titanium tetrachloride in the di-alcohol solvent again under ice-water bath, the amount of titanium tetrachloride is 1.8 mol / L, continue to stir for 15 minutes, then transfer to a polytetrafluoroethylene autoclave for solvothermal reaction, the reaction temperature is 180°C, and the reaction time is 8 hours. Cool to room temperature after the reaction, centrifuge the product, wash the centrifuged product three times with absolute ethanol, and dry the product in a blast drying oven at 50°C for 5 hours. Anatase titanium dioxide with white organic surface modification was obtained by grinding, and finally placed in a muffle furnace, the temperature was raised to 300 °C at a rate of 10 °C / min, heat treated for 2 hours and then ground to obtain gray anatase titanium dioxide / carbon composite Material.

Embodiment 2

[0032]First benzyl alcohol and ethanol are mixed with 1:8 volume ratio to be mixed with 60ml di-alcohol solvent, stir 10 minutes, mix evenly; Add titanium tetrachloride in the di-alcohol solvent again under ice-water bath, the amount of titanium tetrachloride is 1.8 mol / L, continue to stir for 15 minutes, then transfer to a polytetrafluoroethylene autoclave for solvothermal reaction, the reaction temperature is 180°C, and the reaction time is 8 hours. Cool to room temperature after the reaction, centrifuge the product, wash the centrifuged product three times with absolute ethanol, and dry the product in a blast drying oven at 50°C for 5 hours. Anatase titanium dioxide modified by white organic matter surface was obtained by grinding, and finally placed in a tube furnace with argon as a protective atmosphere, the temperature was raised to 300 °C at a rate of 10 °C / min, heat treated for 2 hours and then ground to obtain a black sharp Titanium Titanium Dioxide / Carbon Composite. ...

Embodiment 3

[0034] First benzyl alcohol and ethanol are mixed with 1:5 volume ratio to be mixed with 60ml di-alcohol solvent, stir 10 minutes, mix evenly; Add titanium tetrachloride again in the di-alcohol solvent under ice-water bath, the amount of titanium tetrachloride is 1.8 mol / L, continue to stir for 15 minutes, then transfer to a polytetrafluoroethylene autoclave for solvothermal reaction, the reaction temperature is 180°C, and the reaction time is 8 hours. Cool to room temperature after the reaction, centrifuge the product, wash the centrifuged product three times with absolute ethanol, and dry the product in a blast drying oven at 50°C for 5 hours. Anatase titanium dioxide with white organic surface modification is obtained by grinding, and finally placed in a tube furnace with argon as a protective atmosphere, the temperature rises to 300 °C at a rate of 10 °C / min, heat treatment for 2 hours and then ground to obtain gray black Anatase Titanium Dioxide / Carbon Composite.

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Abstract

The invention provides a method for preparing anatase titanium dioxide / carbon composite materials: under normal temperature conditions of 20 to 30°C, an alcohol solvent other than ethanol and ethanol are evenly mixed in a volume ratio of 1:3 to 11 to prepare a double Alcohol solvent; add titanium tetrachloride to the prepared dialcohol solvent in an ice-water bath at -5~5℃, stir evenly, carry out solvothermal reaction at 120~180℃ for 4~12h, then centrifuge and use absolute ethanol Wash, air-dry at 50-80°C for 4-8 hours, and grind to obtain organic surface-modified anatase titanium dioxide; heat-treat the obtained organic surface-modified anatase titanium dioxide at 100-300°C for 1-4 hours to prepare The anatase titanium dioxide / carbon composite material; in the preparation process of the present invention, there is no need to add acid or alkali as an inhibitor, no need to add other carbon sources, and no need for long-term high-temperature calcination. It is green, environmentally friendly, economical and efficient, and can achieve large-scale production.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of preparation of photocatalytic substances, in particular to a preparation method of anatase titanium dioxide / carbon composite material with high catalytic activity. [0003] (2) Background technology [0004] With the increasingly severe environmental pollution problems, the air and water pollution continue to intensify, and environmental governance has become a hot spot in society. As one of the feasible solutions, photocatalytic technology has attracted extensive attention from scientists in the fields of physics, chemistry, and materials science. Of which titanium dioxide (TiO 2 ) has attracted people's attention due to its advantages of non-toxicity, high catalytic activity, good chemical stability, and low cost, and has become a photocatalyst with broad application prospects. Anatase titanium dioxide, because of its own band gap of 3.2eV, determines that it can only be excited by ultraviol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30B01J21/18
CPCC02F1/30B01J21/18C02F2305/10B01J35/39
Inventor 钱欣袁烨韩欢热陈玉龙周密
Owner 浙江妙舍沁香科技有限公司
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