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Method for preparing composite fiber material for visible light photocatalytic degradation of organic pollutants

A visible light and photocatalyst technology, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of reduced efficiency, refractory degradation, secondary pollution of adsorbents, etc., and achieves reduction in average time and recombination probability. The effect of reducing and improving the photocatalytic activity

Inactive Publication Date: 2010-11-17
于建强 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, printing and dyeing wastewater has become one of the most important sources of water pollution. Especially in recent years, with the rapid development of the dye preparation industry and dye application, there are more and more types of dyes and auxiliaries, and most of them are refractory substances. It also contains carcinogens such as benzene rings, amine groups, and azo groups, which add difficulty to the treatment of dye wastewater
Some traditional treatment methods, such as coagulation precipitation method, adsorption method, membrane separation method, air flotation method, etc., are all non-destructive physical treatment methods, which only transfer the dyes between phases, and do not really mineralize the dyes, and have Problems such as secondary pollution and adsorbent regeneration have not been reasonably resolved
However, the specific surface area of ​​these composite oxides is relatively low, which is not conducive to the enrichment of organic pollutants in sewage and air, thus affecting the degradation efficiency of photocatalysts on organic pollutants.
In addition, powdery photocatalysts are easy to lose with water, which is not conducive to the recycling and reuse of catalysts, and ultrafine powder photocatalysts are easy to agglomerate when used in wastewater treatment, reducing efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for preparing composite fiber material for visible light photocatalytic degradation of organic pollutants
  • Method for preparing composite fiber material for visible light photocatalytic degradation of organic pollutants
  • Method for preparing composite fiber material for visible light photocatalytic degradation of organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] Dissolve in 2.0M HNO 3 0.12mol / LNH 4 VO 3 and 0.12mol / L Bi(NO 3 ) 3 The solution is used as the mother liquid. After the fiber material is washed and dried with pure water, ethanol, deionized water, etc., it is soaked in the mother liquid, and then a certain amount of urea is added to the mixed solution, and the solution is heated to 60-90°C and kept for 5 ~24 hours, the ammonia produced by the hydrolysis of urea gradually increases the pH value of the solution, thereby making BiVO 4 The crystallization is generated on the fiber material, and then the material is washed and dried to obtain the fiber material loaded nano-BiVO 4 catalyst of light. Its shape and structure are as figure 2 As shown, it can be seen that the diameter of the fiber in the synthesized composite fiber material is about 12-13 μm, and the attached BiVO 4 The particle size is about 1.3-3 μm.

Embodiment approach 2

[0018] Dissolve in 2.0M HNO 3 0.12mol / L NH 4 VO 3 and 0.12mol / L Bi(NO 3 ) 3 The solution is used as the mother liquor. After the fiber material is washed and dried with pure water, ethanol, deionized water, etc., it is immersed in the mother liquor. Crystalline; BiVO 4 Produced on the fiber material, wash and dry it to get BiVO 4 Composite textile fiber materials. Among them, the diameter of the fiber in the composite fiber material is about 12-13 μm, and the attached BiVO 4 The particles are also about 1.3 to 3 μm, but compared with the particles of the sample in Embodiment 1, the surface is smoother.

Embodiment approach 3

[0020] 0.12mol / L NH dissolved in citric acid 4 VO 3 and 0.12mol / L Bi(NO 3 ) 3 The solution is used as the mother liquor. After the textile fiber material is washed and dried with pure water, ethanol, deionized water, etc., it is immersed in the mother liquor for 8-12 hours, taken out and dried at 30-60°C for 2-8 hours, and then placed in a high-pressure reaction In the kettle, make it hydrothermally crystallized at 100-200°C; BiVO 4 Produced on the fiber material, wash and dry it to get BiVO 4 Composite textile fiber materials. Its shape and structure are as image 3 shown. It can be seen that the fiber size in the obtained fiber composite material is about 12-13 μm, and the attached BiVO4 particles are about 310-690 nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a composite fiber material applied to visible light photocatalytic purification of sewage and air pollutants and a preparation method thereof. The composite fiber material is synthesized by loading a visible light response type bismuth-based photocatalytic material on a textile fiber material through a green chemical synthetic route. A powdered photocatalyst is solidly loaded by the unique net-like felt structure of the textile fiber material, so that the catalyst is prevented from losing and agglomerating during sewage treatment and air purification, and the separability and reusability are improved.

Description

1. Technical field [0001] The invention relates to a green chemical route to load bismuth-based composite oxides on textile fiber materials to prepare a composite functional textile fiber material. The composite material has the performance of catalytic purification of organic pollutants in sewage and air under visible light irradiation. This study can use the unique mesh structure of fiber materials to immobilize powder photocatalysts, avoid catalyst loss and agglomeration in sewage treatment and air purification, and improve separability and reusability. It belongs to organic-inorganic composite materials and photocatalytic organic pollutants. The technical field of degradation. 2. Background technology [0002] With the rapid development of chemical industries such as pesticides, dyes, and petrochemicals, the problem of environmental pollution has become increasingly serious. Among them, printing and dyeing wastewater has become one of the most important sources of wate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01D53/86B01D53/72C02F1/32
CPCY02A50/20Y02W10/37
Inventor 于建强张妍曲忠良张俊武
Owner 于建强
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