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Preparation method of high-efficiency Zr-doped titanium dioxide photocatalyst

A photocatalyst, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex process, not so economical, and the degradation process needs to be in an acidic environment, etc., to achieve high degradation high efficiency and catalytic activity

Active Publication Date: 2016-10-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the catalytic activity of doping noble metals is generally better, but the cost is high and it is not so economical.
The existing technology generally adopts the impregnation method, sol-gel method, etc., and there are many problems such as complicated process, difficult to repeat, and the degradation process needs to be in an acidic environment, and needs to be improved in practical application.

Method used

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  • Preparation method of high-efficiency Zr-doped titanium dioxide photocatalyst
  • Preparation method of high-efficiency Zr-doped titanium dioxide photocatalyst
  • Preparation method of high-efficiency Zr-doped titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve P25 and zirconia into HF with a concentration of 0.02M at a molar ratio of Ti:Zr=1:2, fill in a kettle, and after hydrothermal treatment in an oven at 200°C for 10 hours, wash the obtained solid, and then put it in Stir in sulfuric acid with a concentration of 5M for sulfonation for 15 hours. The resulting solid was washed and dried to obtain Zr-doped TiO 2 photocatalyst. Electron microscope photos such as figure 1 .

Embodiment 2

[0026] Dissolve the pure phase of rutile and zirconium oxychloride into HF with a concentration of 5M at a molar ratio of Ti:Zr=20:1, fill in a kettle, and after hydrothermal treatment in an oven at 300°C for 40 hours, wash the obtained solid, and then Put it into sulfuric acid with a concentration of 0.01M and stir for sulfonation for 30h. The resulting solid was washed and dried to obtain Zr-doped TiO 2 photocatalyst. XRD spectrum as figure 2 .

Embodiment 3

[0028] Dissolve the pure phase of anatase and zirconium silicate into HF with a concentration of 3M at a molar ratio of Ti:Zr=5:3, put it in a kettle, and after hydrothermal treatment in an oven at 100°C for 25 hours, wash the obtained solid, Then put it into sulfuric acid with a concentration of 2.5M and stir for sulfonation for 1h. The resulting solid was washed and dried to obtain Zr-doped TiO 2 photocatalyst. IR spectrum such as image 3 .

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Abstract

The invention relates to photocatalyst synthesis, and aims at providing a preparation method of a high-efficiency Zr-doped titanium dioxide photocatalyst. The preparation method of the high-efficiency Zr-doped titanium dioxide photocatalyst comprises the following steps: taking a titanium source and a zirconium source, dissolving the titanium source and the zirconium source in HF, arranging the obtained HF solution in a kettle, putting the kettle in an oven, carrying out hydrothermal treatment, washing the obtained treatment product, pushing the washed treatment product in sulfuric acid, carrying out sulfonation treatment, washing the obtained solid, and drying the washed solid to prepare the high-efficiency Zr-doped titanium dioxide photocatalyst. The high-efficiency photocatalyst prepared through doping Zr with TiO2 has a very high degradation rate on pollutants in water, and is economical and environmentally-friendly; and the smallest particle size of prepared particles can reach 2nm, the specific surface area is very large, and an acid center makes the catalysis activity be very high, so the photocatalyst even has a degradation rate being greater than 90% on 2-50ppm organic matters.

Description

technical field [0001] The invention relates to the field of photocatalyst synthesis, in particular to a method for preparing a Zr-doped titanium dioxide high-efficiency photocatalyst. Background technique [0002] With the progress of human society, fossil fuels are burned in large quantities, and the energy problem is becoming more and more serious. Therefore, mankind urgently needs to use new energy to solve the energy crisis and achieve sustainable development. TiO 2 It is a new type of photocatalyst discovered in 1972. It has the characteristics of non-toxic and harmless, good stability, high photocatalytic activity, and can completely decompose and mineralize organic matter under normal temperature and pressure. Therefore, it has been favored by researchers. Pay attention to. [0003] People in TiO 2 A lot of research work has been done on the preparation method, doping modification and so on. Generally speaking, the catalytic activity of doping noble metals is ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J21/063B01J21/066C02F2101/38C02F2101/36C02F2101/345C02F2101/30C02F2305/10B01J35/39
Inventor 王亮马润苑张建肖丰收
Owner ZHEJIANG UNIV