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Preparation method of high-activity segregative TiO2 photocatalyst

A photocatalyst and easy-separation technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low catalytic efficiency of photocatalysts, insufficient firmness of stationary phase, and limited practical use. Achieve the effect of wide application, easy separation and good stability

Inactive Publication Date: 2010-09-22
CHINA WEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 When the photocatalyst is transformed from a nanopowder to a stationary phase, the mass transfer is limited and the specific surface area is reduced, so that the TiO 2 The catalytic efficiency of photocatalyst is very low, and there is a stationary phase TiO 2 Insufficient firmness and other shortcomings limit its practical use

Method used

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  • Preparation method of high-activity segregative TiO2 photocatalyst
  • Preparation method of high-activity segregative TiO2 photocatalyst
  • Preparation method of high-activity segregative TiO2 photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take by weighing 5.4g urea and join the Ti(SO 4 ) 2 In the aqueous solution, stir to dissolve the urea completely, then transfer it to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C for 20 hours. After the product is washed with deionized water and dried at 110°C, it is roasted at 800°C for 5 hours to obtain TiO 2 Powder photocatalyst. The TiO 2 The crystal form of powder photocatalyst is anatase (see figure 1 ), the average particle size is about 900nm (see Figure 2).

Embodiment 2

[0030] Weigh 3.6g urea and join to 60ml 0.5mol / L of Ti(SO 4 ) 2 In the aqueous solution, stir to dissolve the urea completely, then transfer it to a hydrothermal kettle, and conduct a hydrothermal reaction at 100°C for 10 hours. After the product is washed with ion-free water and dried at 110°C, it is roasted at 400°C for 5 hours to obtain TiO 2 Powder photocatalyst.

Embodiment 3

[0032] Take by weighing 10.8g urea and join the Ti(SO 4 ) 2 In the aqueous solution, stir to completely dissolve the urea, then transfer it to a hydrothermal kettle, and conduct a hydrothermal reaction at 200°C for 40 hours. After the product is washed and dried, it is roasted at 900°C for 5 hours to obtain TiO 2 Powder photocatalyst.

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Abstract

The invention discloses a preparation method of high-activity segregative TiO2 photocatalyst. The method takes the sulfate aqueous solution of Ti and carbamide as raw material and prepares the TiO2 powder photocatalyst through hydrothermal deposition and high temperature calcination. The TiO2 powder photocatalyst prepared through the method catalyzes the light degradation of organic contaminant in water, compared with nanometer P25 TiO2 photocatalyst produced by Germany Degussa, has higher photocatalysis activity, good sedimentation, segregative performance and recycle and greatly improves the practicality of the TiO2 photocatalyst in waste water processing.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material manufacturing, in particular to a kind of TiO with high activity and easy separation characteristics for photodegradation of organic pollutants in catalytic water. 2 Preparation method of photocatalyst. Background technique [0002] In recent decades, with the development of my country's industry, the discharge of industrial wastewater has increased day by day, and water resources have been seriously polluted by wastewater. Extensive research has been carried out to explore new and practical wastewater treatment technologies. Semiconductor photocatalysis technology provides an opportunity to solve this problem. A large number of studies have proved that many refractory organic substances can be effectively removed or degraded under the action of photocatalysis. Semiconductor photocatalysis technology has shown great promise in the advanced treatment and reuse of wastewater, the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/02C02F1/30
Inventor 何代平张丽芳勾英姿焦向东江平
Owner CHINA WEST NORMAL UNIVERSITY
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