Modified vanadium tetrasulfide Fenton catalyst and preparation method and application thereof

A vanadium tetrasulfide Fenton and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low activity, low utilization rate of hydrogen peroxide, poor stability, etc., to achieve Simple preparation method, excellent catalytic performance, and low equipment requirements

Active Publication Date: 2019-08-30
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of Fenton's catalytic technology mainly include low activity, poor stability, iron sludge production and low utilization rate of hydrogen peroxide (H2O2) under neutral conditions. And other issues

Method used

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  • Modified vanadium tetrasulfide Fenton catalyst and preparation method and application thereof
  • Modified vanadium tetrasulfide Fenton catalyst and preparation method and application thereof
  • Modified vanadium tetrasulfide Fenton catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The preparation method of a kind of modified vanadium tetrasulfide Fenton catalyst as the embodiment of the present invention, described method comprises the following steps:

[0040] (1) Weigh 0.5g of cetylpyridinium bromide polymer into 30mL of deionized water, stir to dissolve, add 0.35g of ammonium metavanadate, heat to 60°C, and stir for 20min to obtain solution A;

[0041] (2) Weigh 1.13g of thioacetamide and add it to 30mL of ethylene glycol, stir and dissolve to obtain solution B, mix solution A and solution B, and stir at 60°C for 30min to obtain solution C;

[0042] (3) Put solution C in a 100mL autoclave, put the autoclave into an oven and react at 160°C for 12h;

[0043] (4) After cooling, take out the suspension in the reactor, centrifuge and wash the obtained solid with ethanol and deionized water alternately for a total of 6 times, dry the final solid in a 60°C oven for 10 hours, and grind After obtaining described modified vanadium tetrasulfide Fenton c...

Embodiment 2

[0050] The application of a modified vanadium tetrasulfide Fenton catalyst in the degradation of organic pollutants in water as an embodiment of the present invention, the method may further comprise the steps:

[0051] (1) 0.03g of the CNO-VS prepared in Example 1 4 Put the catalyst into 50mL of 10mg / L organic pollutant solution, add 50μL of hydrogen peroxide solution at the same time, and start the Fenton reaction with continuous stirring in the water bath at 35°C;

[0052] The organic pollutants are respectively: rhodamine B (RhB), methylene blue (MB), acid orange 7 (AO7), bisphenol A (BPA), 2-chlorophenol (2-CP) and ciprofloxacin (CIP ).

[0053] Samples were taken at different time points to determine the concentration of pollutants.

[0054] The results of the degradation rate as Figure 5 shown, for CNO-VS 4 Catalyst degradation curves for RhB, MB, AO7, BPA, 2-CP, CIP. In 90 minutes, the degradation rate of BPA and 2-CP reached 100%, the degradation rate of RhB rea...

Embodiment 3

[0056] The application of a modified vanadium tetrasulfide Fenton catalyst in the degradation of organic pollutants in water as an embodiment of the present invention, the method may further comprise the steps:

[0057] (1) 0.03g of the CNO-VS prepared in Example 1 4 Put the catalyst into 50mL of 10mg / L RhB solution, add 50μL of hydrogen peroxide solution at the same time, and start the Fenton reaction with continuous stirring in the water bath at 35°C;

[0058] (2) react for 90min, detect the concentration of RhB;

[0059] (3) CNO-VS after step (2) 4 After the catalyst is separated and dried, put it into 50mL of RhB solution, and add 50μL of hydrogen peroxide solution at the same time, in a water bath at 35°C, start the Fenton reaction for 90min with continuous stirring, and detect the concentration of RhB;

[0060] (4) Repeat step (3).

[0061] Figure 6 Be the CNO-VS that embodiment makes 4 Catalyst recycling activity evaluation diagram for RhB degradation. It can be ...

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Abstract

The invention provides a preparation method of a modified vanadium tetrasulfide Fenton catalyst. The method comprises the following steps: dissolving a metavanadate and a templating agent in water byheating to obtain a solution A; dissolving thioacetamide or thiourea as a sulfur source in ethylene glycol, and performing heating and uniform dispersing with the solution A to obtain a solution C; placing the solution C in a closed container to carry out a hydrothermal reaction for 10-14 h at 140-180 DEG C; and performing washing and drying on the obtained product, and performing grinding to obtain the modified vanadium tetrasulfide Fenton catalyst. The preparation method is simple, and equipment requirements are low. The modified vanadium tetrasulfide Fenton catalyst prepared by the method can rapidly and effectively remove organic pollutants such as rhodamine B, methylene blue and bisphenol A in water, rhodamine B can be removed about 95% in 15 min, and removal rates of bisphenol A and2-chlorophenol both reach 100% at 90 min. The catalyst is a solid catalyst, and is easy to separate from water, and the catalyst can be recycled and the high removal effect is maintained.

Description

technical field [0001] The invention belongs to the technical field of water treatment catalyst preparation, and in particular relates to a modified vanadium tetrasulfide Fenton catalyst and its preparation method and application. Background technique [0002] Fenton catalytic technology is a common method in advanced oxidation water treatment technology. The essence of Fenton method is ferrous ion (Fe 2+ ) and hydrogen peroxide to catalyze the generation of hydroxyl radicals (OH), which can non-selectively oxidize most organic matter in water, and is especially suitable for the oxidation treatment of organic wastewater that is difficult to biodegrade or general chemical oxidation is difficult to work. The shortcomings of Fenton's catalytic technology mainly include low activity, poor stability, iron sludge and hydrogen peroxide (H 2 o 2 ) problems such as low utilization rate. Therefore, it is of great economic significance to develop other metal materials that have redo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J37/10C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/04B01J37/0018B01J37/10C02F1/722C02F1/725C02F2305/026C02F2101/30C02F2101/34C02F2101/40C02F2101/36C02F2101/38C02F2101/345C02F2101/308
Inventor 胡春邓康蓝吕来卢超
Owner GUANGZHOU UNIVERSITY
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