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Method for treating methyl orange with iron porphyrin/bismuth tungstate composite photocatalytic material

A composite photocatalysis and material treatment technology, applied in the field of advanced oxidation treatment of dyes, can solve problems such as large changes in pH value, and achieve the effects of enhanced photocatalytic activity, good degradation effect, and improved photocatalytic performance.

Active Publication Date: 2019-11-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, wastewater containing methyl orange is usually alkaline and has a wide variation in pH

Method used

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  • Method for treating methyl orange with iron porphyrin/bismuth tungstate composite photocatalytic material
  • Method for treating methyl orange with iron porphyrin/bismuth tungstate composite photocatalytic material
  • Method for treating methyl orange with iron porphyrin/bismuth tungstate composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method utilizing iron porphyrin / bismuth tungstate composite photocatalytic material to process methyl orange comprises the following steps:

[0048] According to the mass ratio of iron porphyrin / bismuth tungstate composite photocatalyst material and methyl orange in the methyl orange solution is 10:1, take the iron porphyrin / tungsten that the mass ratio of iron porphyrin and bismuth tungstate is 1:10 The bismuth acid composite photocatalytic material was added to the methyl orange solution with an initial concentration of 10 mg / L for 30 minutes of dark treatment. After reaching the adsorption equilibrium of methyl orange, the composite photocatalytic effect of methyl orange and iron porphyrin / bismuth tungstate was adjusted. The pH value of the mixed solution of the material is 6, and hydrogen peroxide is added to the methyl orange solution according to 0.5‰ of the total volume of the methyl orange solution. Carry out photodegradation for 60 minutes. After the reaction...

Embodiment 2

[0064] A method utilizing iron porphyrin / bismuth tungstate composite photocatalytic material to process methyl orange, comprising the following steps:

[0065]According to the mass ratio of iron porphyrin / bismuth tungstate composite photocatalytic material and methyl orange in the methyl orange solution is 10:1, the mass ratio of iron porphyrin and bismuth tungstate is 0.1:10, 1:10, 2 : 10 iron porphyrin / bismuth tungstate composite photocatalytic material was added to the methyl orange solution with an initial concentration of 10mg / L for 30min in the dark, and after reaching the adsorption equilibrium of methyl orange, the obtained groups of methyl orange were adjusted. The pH value of the mixed solution of orange and iron porphyrin / bismuth tungstate composite photocatalytic material is 6, according to 0.5‰ of the total volume of the methyl orange solution, hydrogen peroxide is added to each group of methyl orange solutions, at a speed of Under the condition of 800r / min and li...

Embodiment 3

[0082] A method utilizing iron porphyrin / bismuth tungstate composite photocatalytic material to process methyl orange comprises the following steps:

[0083] According to the mass ratio of iron porphyrin / bismuth tungstate composite photocatalyst material and methyl orange in the methyl orange solution is 10:1, the mass ratio of iron porphyrin prepared in Example 1 and bismuth tungstate is 1 : 10 iron porphyrin / bismuth tungstate composite photocatalytic materials were added to the methyl orange solution with an initial concentration of 10mg / L for dark treatment for 30min. The pH value of the mixed solution of base orange and iron porphyrin / bismuth tungstate composite photocatalytic material is 3, 6, 8, 9, 12, and then according to 0.5‰ of the total volume of methyl orange solution, hydrogen peroxide is added to each In the methyl orange solution, photodegradation was carried out for 60 minutes under the light conditions of wavelength 300nm to 800nm ​​under the rotating speed of...

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Abstract

The invention discloses a method for treating methyl orange by using iron porphyrin / bismuth tungstate composite photocatalytic material and hydrogen peroxide, wherein iron The porphyrin / bismuth tungstate composite photocatalytic material includes iron porphyrin and bismuth tungstate, and the iron porphyrin is supported on the bismuth tungstate. The method of the invention has the advantages of simple operation, short cycle, easy recycling and reuse, and high degradation efficiency. It can not only quickly and efficiently degrade methyl orange under acidic and weakly acidic conditions, but also can quickly degrade methyl orange under strong alkaline conditions. Orange, achieves effective and rapid degradation of methyl orange, and has good application prospects in actual methyl orange wastewater treatment.

Description

technical field [0001] The invention belongs to the field of advanced oxidation treatment of dyes, and relates to a method for treating methyl orange with a biomimetic substance / semiconductor composite photocatalytic material, in particular to a method for treating methyl orange with an iron porphyrin / bismuth tungstate composite photocatalytic material method. Background technique [0002] Methyl orange is a common dye, 10% to 20% of it is discharged into the water environment during its use, and the wastewater containing methyl orange dye is highly toxic and contains carcinogenic, mutagenic, and teratogenic substances; chroma If the COD value is high, it will inhibit the photosynthesis of plants in the aquatic system; if the COD value is high, it will lead to eutrophication in the water body. Based on the above hazards, wastewater containing methyl orange dye is an urgent problem in water treatment technology. The commonly used treatment methods include adsorption method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/72B01J31/22C02F101/38C02F101/34
CPCC02F1/30C02F1/725B01J31/1815C02F2101/308C02F2101/38C02F2101/40C02F2101/34B01J23/31B01J2531/842B01J2531/0238B01J35/19B01J35/39
Inventor 曾光明易欢赖萃黄丹莲程敏刘希贵李必胜黄芳龙万佳叶淑静宋彪
Owner HUNAN UNIV
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