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Homogeneous Fenton cocatalyst as well as preparation method and application thereof

A catalyst-promoting and Fenton-promoting technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex operation, easy deactivation, high energy consumption, etc., and achieve the promotion of circulation speed effect

Pending Publication Date: 2021-12-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses DSA and modified carbon felt as anode and cathode respectively, which can generate enough H in situ. 2 o 2 , effectively avoiding the H 2 o 2 Trouble in the process of transportation and storage, and the addition of molybdenum disulfide powder and zero-valent iron powder in the system can effectively promote the Fe in the reaction system 3+ / Fe 2+ Circulation rate to maintain a high concentration of Fe in the system 2+ , so as to further increase the reaction rate of the system, and to a certain extent overcome the shortcoming that the zero-valent iron catalyst is easily deactivated during the reaction process, but the operation of the system is relatively complicated and requires high energy consumption
[0007] Publication number is that the patent of CN 112958117 A prepares the Fenton cocatalyst of a kind of copper series sulfide with cupric chloride and thioacetamide, and it is used to promote Fenton reaction to degrade rhodamine B, but the material The preparation process requires a strong acidic environment (pH=0.2~1), and the material only has a good removal effect on rhodamine B

Method used

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  • Homogeneous Fenton cocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A homogeneous Fenton cocatalyst (MoS 2 ) preparation method, comprising the steps of:

[0039] 30mg MoO 3 and 83 mg of thiourea were dissolved in 30 mL of N,N-dimethylformamide, and the mixture was sonicated for 30 min at room temperature to obtain a homogeneous solution. The solution was then transferred to a 100 mL reaction kettle with a polytetrafluoroethylene liner, and heated in an oven at 200 °C for 20 h. After cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and then heated at 40 °C. Dry in the oven.

Embodiment 2

[0044] A homogeneous Fenton cocatalyst (MoS 2 ) preparation method, comprising the steps of:

[0045] 1.372g(NH4) 2 MoO 4 and 1.1418 g of thiourea were dissolved in 30 mL of deionized water, and the mixture was sonicated for 30 min at room temperature to obtain a homogeneous solution. The solution was then transferred to a 100 mL reaction kettle with a polytetrafluoroethylene liner, and heated in an oven at 200 °C for 24 h. After cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and then heated at 40 °C. Dry in the oven.

[0046] Application of Example 2: Add 0.02g of the cocatalyst synthesized above into 50mL of 5mg / L rhodamine B solution, adjust the pH value of the solution to 4.5 with 1mol / L of HCl, add 0.05mg of FeSO to the solution 4 (concentration of 1mg / L) and 0.1mmol of H 2 o 2 Then start the reaction, and after 1 hour of reaction, the removal rate of rhodamine B by this system is 70%.

Embodiment 3

[0048] A homogeneous Fenton cocatalyst (MoS 2 ) preparation method, comprising the steps of:

[0049] 0.144g MoO 3 and 2.2836 g of thiourea were dissolved in 30 mL of deionized water, and the mixture was sonicated for 30 min at room temperature to obtain a homogeneous solution. Then the solution was transferred to a 100 mL high reaction kettle with a Teflon liner, and heated in an oven at 200 °C for 24 h. After cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and then heated at 40 Dry in an oven at °C.

[0050] Application of Example 3: Add 0.02 g of the cocatalyst synthesized above into 50 mL of 5 mg / L rhodamine B solution, adjust the pH value of the solution to 4.5 with 1 mol / L of HCl, and add 0.05 mg of FeSO to the solution 4 and 0.1 mmol of H 2 o 2 Then start the reaction, and after 1 hour of reaction, the removal rate of rhodamine B by this system is 50%.

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Abstract

The invention discloses a homogeneous Fenton cocatalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The technical scheme is characterized in that a molybdenum source and a sulfur source are used as raw materials, and the homogeneous Fenton cocatalyst is synthesized in one step through a simple solvothermal method. The prepared cocatalyst (MoS2) can effectively promote the circulation rate of Fe < 3 + > / Fe < 2 + >, the cocatalytic Fenton system can well remove rhodamine B, parachlorophenol, tetracycline and / or diclofenac sodium in water by 92%, 73%, 87% and 83% respectively only under the condition that 0.1 mmol of H2O2 and 1mg / L of FeSO4 are added, and the system does not generate iron mud.

Description

technical field [0001] The invention relates to the preparation and water treatment application of a homogeneous Fenton co-catalyst, belonging to the technical field of water treatment. Background technique [0002] Industrial wastewater has complex components, a large number of organic pollutants, and many synthetic substances that are difficult to degrade. If it is not treated properly, it will produce harmful ecotoxicological effects. At present, the biochemical treatment method is mostly used to treat industrial wastewater, but the treatment efficiency of this method for refractory organic pollutants is not high, and it is difficult to ensure that the tail water is discharged up to the standard. Therefore, it is urgent to develop new waste / sewage advanced treatment technologies with high efficiency and low energy consumption to achieve rapid removal of refractory organic matter. [0003] The Fenton reaction is a typical advanced oxidation process for the degradation of ...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/72C02F101/30
CPCB01J27/0515C02F1/722C02F1/725C02F2101/30
Inventor 时悦悦胡勇有肖纯李贤
Owner SOUTH CHINA UNIV OF TECH
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