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Preparation method of perovskite type composite oxide for carrying out catalytic degradation on water-soluble dye

A technology of composite oxides and water-soluble dyes, applied in nanotechnology for materials and surface science, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of large daily discharge of printing and dyeing wastewater, high chroma, and water quality Changing complex routine processing and other issues, achieving the effect of low cost, simple process and strong operability

Inactive Publication Date: 2015-01-07
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large daily discharge of printing and dyeing wastewater, high chroma, and complex water quality changes, it is difficult to carry out conventional treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Sr(NO 3 ) 2 , ferric nitrate solution, mixed with equal volumes, added excess citric acid solution, mixed evenly, irradiated under infrared light to make it into a sol, placed it into a gel, and then dried it in vacuum. The target product is the perovskite type composite oxide obtained by sintering for 4 hours.

Embodiment 2

[0014] Embodiment two: to water-soluble dye degradation decolorization effect

[0015] Weigh 100 mg of the perovskite-type composite oxide prepared in Example 1 with a conical flask, add 100 ml of each dye solution with a concentration of 20 mg / L to it, place it on a shaker for 2 hours, and take a small amount of the solution for centrifugation. Use a 721-type spectrophotometer to measure the optical density at the maximum absorption wavelength of the dye, and then calculate the decolorization rate of the dye. The results of degradation and decolorization are shown in Table-1.

[0016] Table-1 Decolorization effect on water-soluble dyes

[0017] dye Acid Red 3B Weak acid blue 2BR Active Orange (II) Reactive Violet X-2R Decolorization rate% 86.9 94.7 90.9 86.1

[0018] It can be seen that all kinds of dye solutions undergo a high degree of degradation and decolorization in the perovskite composite oxide system, and the decolorization rate is abov...

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PUM

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Abstract

The invention relates to a preparation method of perovskite type composite oxide, belonging to the field of dye wastewater treatment method, especially, decoloration treatment method. The preparation method of the perovskite type composite oxide for carrying out catalytic degradation on water-soluble dye comprises the following steps: mixing Sr(NO3)2 and ferric nitrate solution, wherein the concentration and the volume of Sr(NO3)2 are equal to those of ferric nitrate solution; feeding excessive citric acid solution into the mixture, evenly mixing, and then irradiating the mixture with an infrared lamp to enable the mixture to become sol; standing still until the sol becomes gel, and then carrying out vacuum drying; preburning the dry gel for 4 hours at the temperature of 400 DEG C, and then firing for 4 hours at the temperature of 700 DEG C to obtain the target product, namely, the perovskite type composite oxide. The preparation method has the characteristics of being simple in technology, high in operability, low in cost, suitable for industrial production, and the like; the tests prove that the perovskite type composite oxide has an obvious degradation effect for multiple water-soluble dyes and has the decolourization ratio above 86-95%.

Description

technical field [0001] The invention relates to a preparation method of a perovskite type composite oxide, which belongs to the field of dye wastewater treatment, especially the decolorization treatment method. Background technique [0002] Dye wastewater is one of the most refractory industrial wastewater at present, and its harm to the environment is becoming more and more serious, which has received more and more attention. Due to the large daily discharge of printing and dyeing wastewater, high chroma, and complex water quality changes, it is difficult to carry out conventional treatment. [0003] Perovskite-type composite oxides have a variety of unique properties due to their diversity in composition and structure, and are often used as superconducting materials, electromagnetic materials and catalysts. With perovskite composite oxide as catalyst, it can be used for NO, CO, NH 3 The oxidation of organic pollutants has not been reported directly for the catalytic degr...

Claims

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Application Information

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IPC IPC(8): B01J23/78C02F1/00B82Y30/00C02F103/30
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION