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Preparation method of carbon-doped titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology is applied in the field of photocatalyst preparation to achieve the effects of high photocatalytic activity, high pore volume and good photocatalytic performance

Inactive Publication Date: 2018-05-25
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there have been no reports on the preparation of TiO photocatalysts using metal-organic frameworks (MOFs) as templates.

Method used

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Examples

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preparation example Construction

[0018] A kind of preparation method of carbon-doped titanium dioxide photocatalyst of the present invention, the specific operation steps of this preparation method are as follows:

[0019] (1) Preparation of modified MOF-Al powder: Weigh terephthalic acid, dissolve it in N,N-dimethylformamide, then add polyethylene glycol and aluminum nitrate nonahydrate in sequence, and make poly Ethylene glycol accounts for 0.5-5% of the total mass of terephthalic acid and aluminum nitrate nonahydrate, the molar ratio of terephthalic acid and aluminum nitrate nonahydrate is 3:2, stirred at 30°C for 30-60min; then transferred to In a hydrothermal reactor with PTFE lining, react at 150-200°C for 24-72 hours, then cool to 30°C, use a refrigerated centrifuge at 5000-10000r / min, sequentially use deionized water Centrifugal washing twice and absolute ethanol centrifugal washing twice, the crude product was obtained, and finally vacuum-dried at 60°C for 24 hours to obtain a white solid powder, nam...

Embodiment 1

[0024] Weigh 0.83g terephthalic acid, dissolve it in 80mL N,N-dimethylformamide, then add polyethylene glycol and aluminum nitrate nonahydrate in sequence, and make polyethylene glycol account for terephthalic acid and nonahydrate 0.5% of the total mass of aluminum nitrate hydrate, the molar ratio of terephthalic acid to aluminum nitrate nonahydrate is 3:2, stirred at 30°C for 50min; then transferred to a 100mL hydrothermal reaction kettle with a polytetrafluoroethylene liner , react at 150°C for 72 hours, then cool to 30°C, use a refrigerated centrifuge at 8000r / min, successively use deionized water to wash twice and absolute ethanol to wash twice, then the crude product is obtained, and finally Vacuum drying at 60°C for 24 hours to obtain a white solid powder, i.e. modified MOF-Al powder, which was stored in a desiccator until use;

[0025] Measure 20ml of absolute ethanol, add 0.1g of modified MOF-Al powder, and stir magnetically at 500r / min for 20min; then ultrasonically d...

Embodiment 2

[0027]Weigh 1.66g of terephthalic acid, dissolve it in 100mL N,N-dimethylformamide, then add polyethylene glycol and aluminum nitrate nonahydrate in sequence, and make polyethylene glycol account for terephthalic acid and nonahydrate 2.8% of the total mass of hydrated aluminum nitrate, the molar ratio of terephthalic acid and nonahydrated aluminum nitrate is 3:2, stirred at 30°C for 60min; then transferred to a 100mL hydrothermal reaction kettle with a polytetrafluoroethylene liner , react at 180°C for 50 hours, then cool to 30°C, use a refrigerated centrifuge at 10,000r / min, successively use deionized water to wash twice, and absolute ethanol to wash twice, then the crude product is obtained, and finally Vacuum drying at 60°C for 24 hours to obtain a white solid powder, i.e. modified MOF-Al powder, which was stored in a desiccator until use;

[0028] Measure 50ml of absolute ethanol, add 0.8g of modified MOF-Al powder, and stir magnetically at 800r / min for 30min; then ultraso...

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Abstract

The invention provides a preparation method of a carbon-doped titanium dioxide photocatalyst. The method comprises the steps of utilizing polyethylene glycol (PEG) as a dispersing agent for preparingmodified MOF-Al powder, i.e., a metal organic framework material of modified MOF-Al; utilizing the metal organic framework material of the modified MOF-Al as a template, and preparing to obtain a TiO2 / C nanometer composite crystal which is the carbon-doped titanium dioxide photocatalyst provided by the invention. The carbon-doped titanium dioxide photocatalyst is friendly to the environment, a photocatalyst preparation way is expanded, and meanwhile, the carbon-doped titanium dioxide photocatalyst not only has the characteristics of high specific surface area and high pore volume, is high in photocatalytic activity, and shows a better photocatalytic performance; in addition, the preparation method has the characteristic of simple preparation process.

Description

【Technical field】 [0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a carbon-doped titanium dioxide photocatalyst. 【Background technique】 [0002] With the development of social economy, the discharge of a lot of waste water and waste gas has seriously polluted water sources and air. Photocatalytic technology plays an important role in pollution control and environmental protection. It can directly convert light into chemical energy, promote the synthesis and degradation of compounds, and has the advantages of low energy consumption, high efficiency, no secondary pollution, and reusability. It has become a focus of extensive attention and research in many scientific research fields. Titanium dioxide (TiO 2 ) has stable chemical properties, is not prone to photocorrosion after being illuminated, is low in cost, has high photocatalytic reactivity and is non-toxic to organisms. It is recognized as a semiconductor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/10B01J37/08
CPCB01J21/18B01J37/084B01J37/086B01J35/60B01J35/39
Inventor 肖禾张伟波韦懿萃吴慧陈礼辉黄六莲
Owner FUJIAN AGRI & FORESTRY UNIV
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