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Preparation and Application of Titanium Dioxide Nanosheets Loaded Mil-100(fe) Composite Photocatalytic Material

A technology of composite photocatalysis and titanium dioxide, which is applied in the field of titanium dioxide nanosheet-supported porous metal organic framework composite materials and titanium dioxide photocatalysis, can solve the problems of cumbersome methods, unexplained visible light responsiveness, high energy consumption, etc., and achieves good repeatability, The preparation parameters are easy to control and the effect of improving the separation efficiency

Active Publication Date: 2018-10-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome, consumes more energy, and does not demonstrate responsiveness to visible light

Method used

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  • Preparation and Application of Titanium Dioxide Nanosheets Loaded Mil-100(fe) Composite Photocatalytic Material
  • Preparation and Application of Titanium Dioxide Nanosheets Loaded Mil-100(fe) Composite Photocatalytic Material
  • Preparation and Application of Titanium Dioxide Nanosheets Loaded Mil-100(fe) Composite Photocatalytic Material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Add 5ml of hydrofluoric acid with a mass fraction of 40% to 25ml of tetrabutyl titanate, stir evenly at 25°C, put it into a 100ml autoclave, and react at 200°C for 20h. After the reaction is finished, it is washed to neutrality with deionized water and ethanol, and dried to obtain titanium dioxide nanosheet powder.

[0027] (2) Weigh 0.027g of ferric trichloride hexahydrate and dissolve it in 10m of ethanol, ultrasonically dissolve it fully, and then disperse 0.10g of prepared titanium dioxide nanosheets into the above solution, after ultrasonic dispersion is uniform, magnetic force at room temperature After stirring for 15min, the Fe 3+Adsorbed titanium dioxide nanosheets; weigh 0.021g trimesic acid and dissolve it in 10m ethanol, and ultrasonically dissolve it fully, and the adsorbed Fe 3+ The titanium dioxide nanosheets were dispersed into the ethanol solution of trimesic acid, dispersed evenly, placed in a water bath at 70°C for 30 minutes, and then separated b...

Embodiment 2

[0032] The preparation method of the MIL-100 (Fe) loaded titanium dioxide nanosheet composite catalyst, the steps are the same as in Example 1, the difference is: the titanium dioxide nanosheets are coated with MIL-100 (Fe) 5 times

[0033] Weigh 20 mg of the above-prepared MIL-100(Fe)-loaded titanium dioxide nanosheet catalyst to carry out the experiment of visible light catalytic degradation of high concentration methylene blue, the concentration of methylene blue is 50 mg L -1 , the degradation rate of methylene blue was 71.5% after visible light irradiation for 80min.

Embodiment 3

[0035] The preparation method of MIL-100 (Fe) loaded titanium dioxide nanosheet composite catalyst, the steps are the same as in Example 1, the difference is: titanium dioxide nanosheets are coated MIL-100 (Fe) 10 times

[0036] Weigh 20 mg of the above-prepared MIL-100(Fe)-loaded titanium dioxide nanosheet catalyst to carry out the experiment of visible light catalytic degradation of high concentration methylene blue, the concentration of methylene blue is 50 mg L -1 , the degradation rate of methylene blue was 84.2% after visible light irradiation for 80min.

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Abstract

A preparation and application method of titanium dioxide nanosheet-loaded MIL-100 (Fe) composite photocatalytic material, which belongs to the field of titanium dioxide photocatalysis, and particularly relates to the field of titanium dioxide nanosheet-loaded porous metal-organic framework (MOFs) composite materials. In the present invention, tetrabutyl titanate and hydrofluoric acid are stirred evenly at room temperature, put into a hydrothermal reactor for reaction, and titanium dioxide nanosheets are obtained after separation, washing and drying; the titanium dioxide nanosheets are then evenly dispersed in three Ferric chloride absolute ethanol solution, stir magnetically at room temperature for 15 minutes, separate by suction filtration, disperse the obtained product in trimesic acid absolute ethanol solution, react in a water bath at 50-80°C for 20-50 minutes, and then suction filtration The product obtained after separation is repeated 2 to 50 times to obtain titanium dioxide nanosheet-loaded MIL-100 (Fe) composite photocatalytic material; the catalyst prepared by this method is particularly suitable for catalytic degradation of high-concentration organic dyes (such as methylene blue) under visible light irradiation. ), achieving a very high degradation rate.

Description

technical field [0001] The invention relates to the field of titanium dioxide photocatalysis, in particular to the field of titanium dioxide nanosheet-loaded porous metal-organic framework (MOFs) composite materials. The catalyst prepared by the method is particularly suitable for catalytically degrading high-concentration organic dyes (such as methylene blue) under visible light irradiation, and achieves a high degradation rate. Background technique [0002] At present, titanium dioxide photocatalyst has attracted extensive attention of researchers at home and abroad due to its advantages of stability, non-toxicity and low price, and has broad application prospects in wastewater treatment, air purification, antibacterial and deodorizing, self-cleaning and other fields. Anatase-phase single-crystal titanium dioxide nanosheets have a higher proportion of high-energy active surfaces (001), which can more effectively promote the catalytic reaction, and thus have received great ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/30C02F101/30
CPCC02F1/30B01J31/1691C02F2305/10C02F2101/308B01J2531/842B01J35/39
Inventor 王戈刘欣党蕊王芃刘丽萍高鸿毅董文钧
Owner UNIV OF SCI & TECH BEIJING
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