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Preparation method for photo-Fenton catalyst

A catalyst, Fenton's technology, applied in the field of photo-Fenton catalyst preparation, can solve the problems of restricting development and application, difficult to treat sludge, etc., and achieve the effect of enhancing adsorption and promoting the separation of photogenerated charges

Inactive Publication Date: 2018-06-22
YANGTZE NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Fenton reaction is an advanced oxidation technology that uses various methods to decompose the hydroxyl radicals produced by hydrogen peroxide to degrade pollutants in water. Compared with other methods, the Fenton reaction has a significant degradation effect and can degrade some difficult-to-degrade substances, but The Fenton reaction is too dependent on H 2 o 2 , and it has good oxidation ability only in acidic environment, and generates a large amount of difficult-to-handle sludge after the reaction, thus limiting the development and application of this technology

Method used

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  • Preparation method for photo-Fenton catalyst
  • Preparation method for photo-Fenton catalyst
  • Preparation method for photo-Fenton catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of present embodiment composite catalyst is as follows:

[0028] Preparation of α-Fe 2 o 3 : First weigh 1.35g FeCl 3 ·6H 2 O. Mix 1 g of polyethylene glycol-20000 and 3.6 g of sodium acetate into 40 ml of ethylene glycol, and stir for 240 min with a magnetic stirrer to fully dissolve the polyethylene glycol-20000. Add the solution to a 50ml reaction kettle, then place the reaction kettle in a blast drying oven, keep it warm at 200°C for 8 hours, centrifuge and wash after the reaction to obtain Fe 3 o 4 powder. the Fe 3 o 4 The powder was added to an alumina crucible and calcined at 550°C for 2 hours to obtain α-Fe 2 o 3 , denoted as F.

[0029] Preparation of α-Fe 2 o 3 @C and surface treatment: Weigh 0.2gα-Fe respectively 2 o 3 and 2.0 g of glucose were added to 40 ml of distilled water, and ultrasonically mixed for 30 min to make them evenly mixed. The suspension was transferred to a 50ml reactor, and placed in a dry oven at 180°...

Embodiment 2

[0032] The difference between embodiment 2 and embodiment 1 is: in the preparation of α-Fe 2 o 3 When @C, the addition of glucose is 1.0g, other conditions are all the same, the α-Fe prepared by embodiment 2 2 o 3 @C@Bi 2 o 3 -Bi 2 WO 6 The catalyst is noted as FCB1.

[0033] Result representation

[0034] figure 1 α-Fe prepared for Example 1 2 o 3 , α-Fe 2 o 3 @C and α-Fe 2 o 3 @C@Bi 2 o 3 -Bi 2 WO 6 The X-ray diffraction pattern, in the figure F, FC2 and FCB2 correspond to the multi-step hydrothermal (solvothermal) method to prepare α-Fe 2 o 3 , α-Fe 2 o 3 @C and α-Fe 2 o 3 @C@Bi 2 o 3 -Bi 2 WO 6 .

[0035] There are obvious diffraction peaks in the F spectrum at 33.24°, 35.69°, 41.02°, 49.54°, 54.18°, 62.54° and 64.07°, which correspond to α-Fe 2 o 3 The (104), (110), (113), (024), (116), (214) and (300) crystal planes match JCPDS card No.87-1166. The diffraction peaks of the FC2 spectrum become weaker, and there are only three weak peaks at 3...

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Abstract

The invention discloses a preparation method for a photo-Fenton catalyst. The method first prepares Alpha-Fe2O3@C, surface treatment is then carried out on the prepared Alpha-Fe2O3@C, the surface-treated Alpha-Fe2O3@C is then mixed with Na2WO4.2H2O, Bi(NO3)3.5H2O and sodium citrate, and after hydrothermal reaction, the catalyst is prepared. With Alpha-Fe2O3 as a core, amorphous carbon as an intermediate layer and Bi2O3-Bi2WO6 heterojunction as an outermost layer, the catalyst not only can promote photo-induced charge separation, but also remarkably enhance the adsorption of dye molecules by the catalyst, and has a remarkable degradation effect of RhB. The specific surface area is up to 67.95m<2> / g, and as the dosage of H2O2 is increased, the rate of RhB degradation is gradually increased;and when the concentration of H2O2 is 5mol / L, the reaction rate constant of the Alpha-Fe2O3@C@Bi2O3-Bi2WO6 catalyst in degrading RhB is 0.01876min<-1>, which is 136 times the reaction rate constant ofphotocatalytic degradation.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method of a photo-Fenton catalyst. Background technique [0002] The discharge of industrial pollutants such as dye wastewater has caused great pollution to the natural environment on which human beings depend. A large amount of wastewater is discharged into nature every year, which leads to the limitations of traditional pollution control methods and promotes some advanced water treatment. The emergence of technology. [0003] The Fenton reaction is an advanced oxidation technology that uses various methods to decompose the hydroxyl radicals produced by hydrogen peroxide to degrade pollutants in water. Compared with other methods, the Fenton reaction has a significant degradation effect and can degrade some difficult-to-degrade substances, but The Fenton reaction is too dependent on H 2 o 2 , and it has good oxidation ability in acidic environment, and gener...

Claims

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Application Information

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IPC IPC(8): B01J23/888C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J23/002B01J23/888C02F2101/308C02F2305/026B01J2523/00B01J35/398B01J35/40B01J35/613B01J35/39B01J2523/54B01J2523/69B01J2523/842
Inventor 张鹏华兴张妮董志源
Owner YANGTZE NORMAL UNIVERSITY
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