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Flaky iron molybdate photocatalyst for dye wastewater treatment and preparation method thereof

A dye wastewater and photocatalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor catalytic degradation effect, poor performance stability, low catalytic activity, etc., and achieve quantum efficiency High, stable performance, strong photocatalytic activity

Inactive Publication Date: 2018-07-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Currently widely used molybdate photocatalysts, especially iron molybdate catalysts, have problems such as small specific surface area, poor dispersion, poor performance stability, low catalytic activity, and poor catalytic degradation effect on pollutants in sewage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add ferric ammonium citrate to deionized water to form an aqueous solution, then add protein, stir and dissolve in a stirrer, and add sodium molybdate while stirring, and mix well to obtain a mixed reaction solution; the protein is Fibrin; the stirrer is a turbine stirrer, the stirring speed is 1000r / min, and the stirring time is 70min;

[0033] In the mixed reaction liquid, by weight, wherein: 26 parts of ferric ammonium citrate, 32 parts of sodium molybdate, 35 parts of deionized water, 6 parts of protein;

[0034] (2) Add an acid-base regulator dropwise to the mixed reaction solution prepared in step (1) to adjust the pH value to 6, then place it in a water bath and heat it to 85°C, and react for 8 hours to obtain a wet gel; acid-base Regulator is sodium carbonate;

[0035] (3) Heat and dry the wet gel prepared in step (2) to obtain a dry gel; the heating temperature for drying is 140°C, and the drying time is 2.5 hours;

[0036] (4) Transfer the dry gel obtain...

Embodiment 2

[0039] (1) Add ferric ammonium citrate to deionized water to form an aqueous solution, then add protein, stir and dissolve in a stirrer, and add sodium molybdate while stirring, and mix well to obtain a mixed reaction solution; the protein is Globulin; the stirrer is a propeller type stirrer, the stirring speed is 800r / min, and the stirring time is 80min;

[0040] In the mixed reaction liquid, by weight, wherein: 24 parts of ferric ammonium citrate, 30 parts of sodium molybdate, 41 parts of deionized water, 5 parts of protein;

[0041] (2) Add an acid-base regulator dropwise to the mixed reaction solution prepared in step (1) to adjust the pH value to 4, then place it in a water bath and heat it to 80°C, and react for 10 hours to obtain a wet gel; acid-base Regulator is potassium carbonate;

[0042] (3) Heating and drying the wet gel prepared in step (2) to obtain a dry gel; the heating temperature for drying is 130°C, and the drying time is 3 hours;

[0043] (4) Transfer th...

Embodiment 3

[0046] (1) Add ferric ammonium citrate to deionized water to form an aqueous solution, then add protein, stir and dissolve in a stirrer, and add sodium molybdate while stirring, and mix well to obtain a mixed reaction solution; the protein is Collagen; the stirrer is a ribbon stirrer, the stirring speed is 1100r / min, and the stirring time is 60min;

[0047] In the mixed reaction liquid, by weight, wherein: 28 parts of ferric ammonium citrate, 34 parts of sodium molybdate, 30 parts of deionized water, and 8 parts of protein;

[0048] (2) Add an acid-base regulator dropwise to the mixed reaction solution prepared in step (1) to adjust the pH value to 8, then place it in a water bath and heat it to 90°C, and react for 7 hours to obtain a wet gel; acid-base Regulator is citric acid;

[0049] (3) Heating and drying the wet gel prepared in step (2) to obtain a dry gel; the heating temperature for drying is 150°C, and the drying time is 2 hours;

[0050] (4) Transfer the dry gel ob...

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Abstract

The invention relates to the field of wastewater treatment, and discloses a flaky iron molybdate photocatalyst for dye wastewater treatment and a preparation method thereof. The preparation method comprises the following preparation processes that (1) all raw materials including 24 to 28 parts of ammonium ferric citrate, 30 to 34 parts of sodium molybdate, 30 to 41 parts of deionized water and 5 to 8 parts of protein are prepared into mixed reaction liquid according to the mass parts; (2) after the pH value in the mixed reaction liquid is regulated to 4 to 8, water bath heating is performed; wet gel is prepared; (3) heating and drying are performed to obtain dry gel; (4) the dry gel is heated to 600 to 800 DEG C, and treatment is performed for 2 to 3h; grinding is performed to obtain the flaky iron molybdate photocatalyst for dye wastewater treatment. Compared with an ordinary molybdate photocatalyst, the prepared iron molybdate photocatalyst has the advantages that the specific surface area is large; the dispersibility is high; the sunlight utilization rate is high; the quantum efficiency is high; the photocatalytic activity is very high; the performance is stable; contaminants inthe printing and dyeing wastewater can be fast and effectively degraded.

Description

technical field [0001] The invention relates to the field of waste water treatment, and discloses a sheet-shaped iron molybdate photocatalyst for dye waste water treatment and a preparation method thereof. Background technique [0002] The printing and dyeing industry is a large discharge of industrial wastewater. Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, deep color, high alkalinity, and large changes in water quality. It is a difficult industrial wastewater to treat. In recent years, due to the development of chemical fiber fabrics, the rise of imitation silk and the progress of printing and dyeing finishing technology, a large amount of refractory biodegradable organic substances such as pulp, rayon hydrolyzate, and new additives have entered the printing and dyeing wastewater. Traditional chemical precipitation and air flotation The decolorization effect rate of this type of printing and dyeing wastew...

Claims

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Application Information

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IPC IPC(8): B01J23/881B01J35/10B01J37/03B01J37/08C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J23/002B01J23/881B01J37/036B01J37/082C02F2101/38C02F2101/36C02F2101/308C02F2101/40C02F2305/10B01J35/615B01J35/39
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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