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Preparation method of visible light enhanced ozonation composite catalyst for wastewater treatment

A composite catalyst, ozone oxidation technology, applied in catalyst activation/preparation, physical/chemical process catalyst, energy and wastewater treatment, etc., can solve the problems of low activity, catalyst absorption of visible light, low conversion efficiency, etc., and achieve low production cost. , The effect of photocatalytic efficiency and ozone catalytic efficiency improvement, enriching the application form

Active Publication Date: 2015-11-04
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the practical application of visible light catalytic technology to wastewater treatment, and visible light / O 3 The research and application of coupled catalytic technology in the field of wastewater treatment is less, mostly due to the influence of actual wastewater water quality, chromaticity, impurity suspended solids, pollutant attachment, etc., which makes the catalyst's absorption and conversion efficiency of visible light low, and the activity shown not tall

Method used

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  • Preparation method of visible light enhanced ozonation composite catalyst for wastewater treatment
  • Preparation method of visible light enhanced ozonation composite catalyst for wastewater treatment
  • Preparation method of visible light enhanced ozonation composite catalyst for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare this composite catalyst as follows:

[0024] Step 1: 0.920g ZrOCl 2 ·8H 2 O and 0.136g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 50ml of deionized water and stirred evenly to obtain a mixed solution. Weighed 10g of carbon fiber (PAN-based carbon fiber) and impregnated it in the mixed solution for 6 hours, then took it out and dried it in the air, dried at 80°C for 2h, and at 600°C for 6h in N 2 Roasting in protection, obtained Ce x Zr 1-x o 2 Solid solution modified carbon fiber, where Ce x Zr 1-x o 2 The molar ratio of cerium and zirconium in the solid solution is: 1:9;

[0025] Step 2: Weigh 2.39g La(NO 3 ) 3 ·6H 2 O and 0.801g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 50ml deionized water, and the homogeneously loaded Ce obtained in step 1 x Zr 1-x o 2 The carbon fiber of solid solution is immersed in the above mixed solution for 6 hours, after the impregnation is completed, take it out and dry it in the air, dry it at 80°C for 2 hours, and dry it at...

Embodiment 2

[0034] Prepare this composite catalyst as follows:

[0035] Step 1: 0.308g ZrOCl 2 ·8H 2 O and 3.74g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 50ml of deionized water and stirred evenly to obtain a mixed solution. Weighed 10g of carbon fiber (PAN-based carbon fiber) and immersed it in the mixed solution for 4 hours, then took it out and dried it in the air, dried it at 80°C for 2h, and dried it at 500°C for 4h in N 2 Roasting in protection, obtained Ce x Zr 1-x o 2 solid solution modified carbon fibers,

[0036] where Ce x Zr 1-x o 2 The molar ratio of cerium and zirconium in the solid solution is: 9:1;

[0037] Step 2: Weigh 2.92g La(NO 3 ) 3 ·6H 2 O and 3.92g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 50ml deionized water, and the homogeneously loaded Ce obtained in step 1 x Zr 1-x o 2 The carbon fiber of solid solution is immersed in the above mixed solution for 4 hours, after the impregnation is completed, take it out and dry it in the air, dry it at 80°C for 2 ho...

Embodiment 3

[0047] Prepare this composite catalyst as follows:

[0048] Step 1: 4.60g ZrOCl 2 ·8H 2 O and 0.680g Ce(NO 3 ) 3 ·6H 2O was dissolved in 50ml of deionized water and stirred evenly to obtain a mixed solution. Weighed 10g of carbon fiber (PAN-based carbon fiber) and immersed it in the mixed solution for 2 hours, then took it out and dried it in the air, dried at 60°C for 2h, and at 400°C for 4h in N 2 Roasting in protection, obtained Ce x Zr 1-x o 2 Solid solution modified carbon fiber, where Ce x Zr 1-x o 2 The molar ratio of cerium and zirconium in the solid solution is: 1:9;

[0049] Step 2: Weigh 4.77g La(NO 3 ) 3 ·6H 2 O and 1.60g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 50ml deionized water, and the homogeneously loaded Ce obtained in step 1 x Zr 1-x o 2 The carbon fiber of solid solution is immersed in the above mixed solution for 2 hours, after the impregnation is completed, take it out and dry it in the air, dry it at 60°C for 2 hours, and dry it at 400°C...

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Abstract

The invention relates to a preparation method of a visible light enhanced ozonation composite catalyst for wastewater treatment. The preparation method comprises the following sequential steps: impregnating carbon fiber in a mixed solution composed of ZrOCl2.8H2O and Ce(NO3)3.6H2O, taking out the impregnated carbon fiber and ageing, drying, and calcining to obtain CexZr1-xO2 solid solution modified carbon fiber, wherein x is less than or equal to 0.9 and greater than or equal to 0.1; impregnating the CexZr1-xO2 solid solution modified carbon fiber in a mixed solution composed of La(NO3)3 and Ni(NO3)2, taking out the impregnated carbon fiber and aging, drying, and calcining to obtain La2O3 / NiO binary oxide carbon fiber; impregnating the La2O3 / NiO binary oxide carbon fiber in a TiO2 sol doped with N and F, taking out the impregnated carbon fiber and aging, drying, and calcining to obtain the visible light enhanced ozonation composite catalyst. The catalyst has advantages of low manufacture cost, uniform structure, large specific surface area and good stability.

Description

technical field [0001] The invention relates to a preparation method of a visible light-enhanced ozone oxidation composite catalyst used for wastewater treatment, which can degrade organic pollutants with visible light while catalyzing ozonation, and belongs to the research field of wastewater treatment. Background technique [0002] The accelerated industrialization process has led to a large amount of industrial waste water output, and the problem of environmental pollution is becoming more and more serious. Currently applied treatment techniques include physical, biological, chemical or biochemical, physicochemical treatment and other means. However, the composition of industrial wastewater is complex, difficult to degrade, toxic and harmful, and traditional water treatment methods are difficult to treat, which promotes the development of advanced oxidation technology. [0003] The oxidation-reduction potential of ozone in water is very high, second only to fluorine. It ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/06B01J37/025C02F1/78C02F1/30
CPCY02W10/37
Inventor 王哲明沈树宝王桂林黄勇陈英文罗翔章继龙孙南南刘娟郭玉旗
Owner SINOPEC YANGZI PETROCHEM
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