Method for quick degrading pollutant in water

A rapid degradation and pollutant technology, applied in chemical instruments and methods, oxidized water/sewage treatment, chemical/physical processes, etc., can solve the problems of limited reaction speed, low catalytic performance, and limited effective working area of ​​photocatalytic materials, etc. To achieve the effect of fast degradation and high efficiency

Inactive Publication Date: 2003-10-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TiO prepared by powder coating and sintering 2 At the same time, the coverage of the binder limits the effective working area of ​​the photocatalytic material, and the degradation of the binder itself will also limit the service life.
[0004] TiO prepared by most methods 2 Catalysis only has ultraviolet photocatalytic activity, even if it has natural light photocatalytic activity, the effect is not ideal
In the absence of light, the existing TiO 2 More difficult to achieve rapid degradation of pollutants
[0005] Adding copper ions or silver ions in water can realize the joint action with oxidants to degrade pollutants in the dark, b

Method used

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  • Method for quick degrading pollutant in water
  • Method for quick degrading pollutant in water
  • Method for quick degrading pollutant in water

Examples

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Example Embodiment

[0033] Example 1: see figure 1 , 2 , 3, 4, 5. figure 1 , 2 , 3, 4, and 5 are the X-ray diffraction patterns of titanium oxide prepared by different methods in the present invention. It can be seen from the figure that the coating is mainly composed of anatase phase and rutile phase. According to the spraying method The content of anatase phase is different. According to the implementation of the present invention, such as figure 1 The content of the titanium oxide anatase phase of the liquid thermal spraying shown can be varied within the range of 0-100%; figure 2 , 3 The titanium oxide prepared by cold spraying can basically maintain the crystal structure of the original powder; cold spraying is also regarded as the newly developed thermal spraying technology, which is considered to be one of the latest developments in thermal spraying technology; Figure 4 , 5 In the titanium oxide prepared by supersonic flame spraying and plasma spraying, the adjustability of the anatase ph...

Example Embodiment

[0034] Example 2: see Figure 6 , 7 ,8. Figure 6 , 7 And 8 are respectively the surface morphology of the titanium oxide coating prepared in the practice of the present invention. A titanium oxide coating prepared by cold spraying with rutile titanium oxide powder, the titanium oxide particles are fixed on the substrate in an embedded form to form the coating of the present invention, such as Figure 6 The part with sharp edges and corners represented by the similar sign "1" is titanium oxide, and the part represented by the sign "2" with similar appearance is the matrix. Such as Figure 7 The surface morphology of the titanium oxide coating prepared by liquid spraying shows the morphology of agglomeration and accumulation. XRD and TEM confirm that the coating is a nanostructured coating formed by the accumulation of nanoparticles. Such as Figure 8 The titanium oxide coating prepared by supersonic flame spraying of anatase-type titanium oxide powder shown has a relatively large ...

Example Embodiment

[0035]Example 3: See Picture 9 . Picture 9 According to the idea of ​​the present invention, several titanium oxide coatings prepared by the present invention are combined with hydrogen peroxide to degrade the performance of phenol in water under the condition of no light. The test condition is room temperature, the titanium oxide used is titanium oxide coating, the surface area is 25cm 2 (Note: Considering the actual total surface area of ​​the coating surface roughness is 2 to 5 times this value), the phenol concentration is 50ppm, the volume is 100ml, and the hydrogen peroxide concentration when liquid spraying, cold spraying, and plasma spraying of titanium oxide coating are used is Respectively 100, 50 and 25ppm, which means that the relative molar ratio of hydrogen peroxide oxidant to phenol is 6:1 to 1.5:1, and the solution is stirred and oxygenated by airing 100ml / min. It can be found from the figure that without a coating, phenol does not degrade, and various coatings c...

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Abstract

A process for fastly degradating pollutant in water features the cooperation of the titanium oxide prepared by hot spray and the oxidizing agent. Its advantages are high effect and speed and low cost.

Description

1. Technical field [0001] The invention belongs to the fields of chemical material processing and water treatment, and relates to the preparation and application of a chemical material, in particular to a method for rapidly degrading pollutants in water by utilizing the combined action of thermal spraying titanium oxide and an oxidizing agent. 2. Background technology [0002] TiO with photocatalytic activity 2 It has broad application prospects in polluted water treatment, water purification treatment, etc. Compared with other chemical treatment methods, it has the advantages of convenient use, low operating cost, and no secondary pollution. [0003] Existing TiO with photocatalytic activity 2 Most of them are prepared by vapor deposition method, sol-gel method, powder coating sintering and other methods. The gas phase deposition method has relatively strict requirements on gas composition and temperature, and the equipment is complex, resulting in high manufacturing cost...

Claims

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Application Information

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IPC IPC(8): B01J21/06C02F1/72
Inventor 李长久杨冠军
Owner XI AN JIAOTONG UNIV
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