Lanthanum-iodine co-doped photocatalyst composite material and preparation method thereof

A photocatalyst and composite material technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as difficult recycling, low absorption and utilization of sunlight, and limited practical applications

Inactive Publication Date: 2018-05-08
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has many problems, such as a wide band gap (3.2eV), which leads to a low absorption and utilization rate of sunlight, which can only reach 4%, and it is difficult to recycle, which seriously limits its practical application.

Method used

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  • Lanthanum-iodine co-doped photocatalyst composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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.

[0028] 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

[0033] 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.

[0034] 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 NH 3 ·H 2 O (28%), after sti...

Embodiment 3

[0039] 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.

[0040] 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 lanthanum-iodine co-doped photocatalyst composite material and a preparation method thereof. The composite material is prepared by the following method: using ferroferric oxide nanoparticles as a magnetic core and using ethyl orthosilicate as a silicon source, coating the surface of the ferroferric oxide nanoparticles with a porous active silicon layer to obtaina porous magnetic carrier by using a sol-gel method, then using titanate as a titanium source and iodic acid as a raw material, and baking to obtain a precursor; and then adopting a precipitation-impregnation method, using lanthanum nitrate as a raw material, and preparing lanthanum-iodine co-doped visible-light catalytic magnetic porous titanium dioxide composite microspheres, namely the magnetic lanthanum-iodine co-doped photocatalyst composite material. According to the lanthanum-iodine co-doped photocatalyst composite material prepared by the fractional step method, lanthanide iodine andanatase titanium dioxide can be simultaneously doped and are attached to the magnetic matrix, and not only can the light response ability of the material be improved, but also the recycling capacity of the catalyst can be enhanced.

Description

(1) Technical field [0001] The invention relates to a magnetic lanthanum-iodide co-doped photocatalyst composite material and a preparation method thereof. (2) Background technology [0002] With the increasingly serious problem of global water pollution, people realize that it is urgent to protect water resources and control water pollution. However, the amount of pollutants discharged into the water is large, the composition is complex and easy to diffuse, and it is not easy to degrade. Conventional methods are time-consuming and labor-intensive, with little effect. In recent years, photocatalysts have attracted attention due to their high efficiency in treating sewage. Among them, the semiconductor photocatalyst TiO 2 As a green and environmental protection treatment method with broad application prospects, not only the process is simple, but also the treatment effect is obvious. favored by researchers. But usually a single photocatalyst TiO 2 Composite TiO has many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C02F1/30C02F101/30
CPCB01J27/135B01J35/0033B01J35/004C02F1/30C02F2101/308
Inventor 邰玉蕾晁国库林大杰张伟禄宫剑华
Owner WENZHOU UNIVERSITY
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