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Magnetic tungsten doped photocatalyst composite material and preparation method thereof

A technology of composite materials and photocatalysts, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as difficulties and high recycling costs

Inactive Publication Date: 2018-05-22
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively small particles of titanium dioxide photocatalyst, the recovery cost is high, which brings difficulties to its practical application.

Method used

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  • Magnetic tungsten doped photocatalyst composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 90mL of distilled water was added to a 250mL three-necked flask, and 8.8g of FeCl 2 4H 2 O, 22g FeCl 3 ·6H 2 O was placed therein, and stirred until the solid in the three-necked flask was completely dissolved. When the temperature was heated to 80°C, high-purity nitrogen gas was introduced to remove the oxygen in the reaction device, and 55 mL of NH 3 ·H 2 O (25%), after continuing to react for 30 min, 0.9 mL of oleic acid was added dropwise into the three-necked flask, and the temperature was raised to 85° C. for 180 min. The resulting product was washed several times with distilled water to remove unreacted oleic acid. After high-temperature drying, grinding, and finally get Fe 3 o 4 Nanoparticles.

[0031] Weigh the Fe obtained in the above steps 3 o 4 0.05g, add 40mL of absolute ethanol and 10mL of deionized water into a 250mL three-neck flask, after mixing, use an ultrasonic instrument to vibrate for 20min, and add 0.5mL of NH 3 ·H 2 O (28%), after sti...

Embodiment 2

[0036] 100mL of distilled water was added to a 250mL three-necked flask, and 9.8g of FeCl 2 4H 2 O, 24g FeCl 3 ·6H 2 O was placed therein, and stirred until the solid in the three-necked flask was completely dissolved. When the temperature was heated to 80°C, high-purity nitrogen gas was introduced to remove the oxygen in the reaction device, and 50 mL of NH 3 ·H 2 O (25%), after continuing the reaction for 30 min, 1 mL of oleic acid was added dropwise to the three-necked flask, and the temperature was raised to 85° C. for 180 min. The resulting product was washed several times with distilled water to remove unreacted oleic acid. After high-temperature drying, grinding, and finally get Fe 3 o 4 Nanoparticles.

[0037] Weigh the Fe obtained in the above steps 3 o 4 0.1g, add 80mL of absolute ethanol and 20mL of deionized water into a 250mL three-neck flask, after mixing, use an ultrasonic instrument to vibrate for 20min, and add 1.0mL of NH3 ·H 2 O (28%), after stirr...

Embodiment 3

[0042] 110mL of distilled water was added to a 250mL three-necked flask, and 10.8g of FeCl 2 4H 2 O, 27g FeCl 3 ·6H 2 O was placed therein, and stirred until the solid in the three-necked flask was completely dissolved. After the temperature was heated to 80°C, high-purity nitrogen gas was introduced to remove the oxygen in the reaction device, and 65mL of NH 3 ·H 2 O (25%), after continuing to react for 30 min, 1.1 mL of oleic acid was added dropwise into the three-necked flask, and the temperature was raised to 85° C. for 180 min. The resulting product was washed several times with distilled water to remove unreacted oleic acid. After high-temperature drying, grinding, and finally get Fe 3 o 4 Nanoparticles.

[0043] Weigh the Fe obtained in the above steps 3 o 4 0.2g, add 160mL of absolute ethanol and 40mL of deionized water into a 500mL three-neck flask, after mixing, use an ultrasonic instrument to vibrate for 20min, and add 2.0mL of NH 3 ·H 2 O (28%), after s...

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Abstract

The invention relates to a magnetic tungsten doped photocatalyst composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: coating the surface of a ferroferric oxide nanoparticle used as a magnetic core with a porous active silicon layer through a sol-gel technology with tetraethyl orthosilicate as a silicon source, and preparing a WOx doped visible light catalyzed magnetic porous titanium dioxide composite microsphere which is the magnetic tungsten doped photocatalyst composite material through a mixed sol technology with titanate as a titanium source and tungsten tungstate as a tungsten source. The tungsten doped magnetic composite material prepared step by step can be simultaneously doped with tungsten and anatase titanium dioxide, and can be attached to a magnetic matrix, so the light response capability of the material is improved, and the recycling capability of the obtained catalyst is enhanced.

Description

(1) Technical field [0001] The invention relates to a magnetic tungsten-doped photocatalyst composite material and a preparation method thereof. (2) Background technology [0002] Nano-titanium dioxide photocatalyst is a high-quality feature with high efficiency, non-toxicity, high catalytic activity, good stability and low energy consumption. Therefore, people pay more attention to the use of nano-titanium dioxide photocatalyst for environmental sanitation and pollution treatment. In chemical methods, photocatalysts are used to degrade organic pollutants under the action of solar energy. The principle of photocatalyst is to use sunlight to irradiate the surface of semiconductor materials, thereby generating high-energy hole-electron pairs, and generating oxidation reactions to degrade organic pollutants on the surface of semiconductor materials. Among them, titanium dioxide in semiconductor materials has the advantages of relatively stable performance and efficient polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/02B01J35/00
CPCB01J23/888B01J35/33B01J35/00B01J35/30B01J35/39
Inventor 邰玉蕾林大杰晁国库
Owner WENZHOU UNIVERSITY
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