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Method for preparing graphite felt cathode material and modified graphite felt cathode electro-Fenton reactor

A cathode material and graphite felt technology, which is applied in chemical instruments and methods, water treatment of special compounds, water/sewage treatment, etc., can solve the problems of low output and low oxidation efficiency, and achieve short treatment cycle, simple treatment equipment, and high energy efficiency. The effect of low consumption

Inactive Publication Date: 2018-11-20
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, aiming at the deficiencies in the prior art, the invention provides a preparation method of graphite felt cathode material and a modified graphite felt cathode electro-Fenton reactor, which adopts cathode electrogenerated H 2 o 2 and adding ferrous solution to form a cathodic Fenton system, in order to avoid the occurrence of H 2 o 2 Low output and low oxidation efficiency, through surface modification of graphite felt cathode, increase hydrophilic oxygen-containing functional groups, promote electrocatalytic reaction, and increase H 2 o 2 output, and then achieve the purpose of organic matter degradation

Method used

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  • Method for preparing graphite felt cathode material and modified graphite felt cathode electro-Fenton reactor

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Embodiment 1

[0024] This embodiment provides a method for preparing a graphite felt cathode material, the steps comprising:

[0025] S1) Use graphite felt as the electrode material, ultrasonically treat it with ethanol or acetone for 30 minutes, wash it repeatedly with deionized water until the cleaning solution is neutral, dry it in an oven at 105°C for 12-24 hours, and finally heat it at 150°C for 2 hours . Used to remove grease or impurities on the surface of graphite felt.

[0026] S2) immerse the graphite felt after step S1) in concentrated HNO 3 In, the concentrated HNO 3 Concentrated nitric acid purchased from the market, with a mass fraction of 68%, was heated to 80°C in a water bath. After 2 hours of treatment, it was repeatedly washed with deionized water until the cleaning solution was neutral, and dried in an oven at 105°C for 2 hours. The strong oxidative properties are used to destroy the surface of graphite felt and introduce oxygen-containing functional groups, such as c...

Embodiment 2

[0031] The invention provides a modified graphite felt cathode electro-Fenton reactor, comprising an electrolytic reaction cell 1 with a cylindrical structure, a stirring device 2 is provided at the center of the electrolytic reaction cell 1, and the stirring device includes a vertically arranged electrolytic reaction cell 2. A stirring rod 201 at the center of the reaction tank 1 and an electric stirrer 202 that provides rotational power for the stirring rod, and the electric stirrer 202 is installed at the center of the top plate of the electrolytic reaction tank 1 .

[0032] The stirring rod 201 circumference is coaxially provided with a cylindrical graphite felt cathode 3, the material used in the cathode is prepared by the preparation method of the graphite felt cathode material described in Example 1, and the surface of the modified graphite felt cathode 3 is Helical gear, the gear inclination angle is 60°, the gear inclination angle refers to the angle between the short ...

Embodiment 3

[0036] This embodiment provides a method for preparing a graphite felt cathode material, the steps comprising:

[0037] S1) Graphite felt was selected as the electrode material, ultrasonically treated with ethanol or acetone for 100 minutes in sequence, washed repeatedly with deionized water until the cleaning solution was neutral, dried in an oven at 110°C for 20 hours, and finally heated at 150°C for 3 hours. Used to remove grease or impurities on the surface of graphite felt.

[0038] S2) immerse the graphite felt after step S1) in concentrated HNO 3 , heated to 85°C in a water bath, and after 2 hours of treatment, repeatedly washed with deionized water until the cleaning solution was neutral, and dried in an oven at 115°C for 2 hours. The strong oxidative properties are used to destroy the surface of graphite felt and introduce oxygen-containing functional groups, such as carboxyl groups.

[0039] S3) Immerse the graphite felt treated in step S2) in the ethanol suspensio...

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Abstract

The invention provides a method for preparing a graphite felt cathode material, and a modified graphite felt cathode electro-Fenton reactor based on the preparation method. The reactor comprises an electrolytic reaction cell (1), staggered anodes (5), cylindrical modified graphite felt cathodes (3), aeration pipes (4), a stirring device (2) and a ladder type mud bucket (7), wherein the aeration pipes (4) are installed on two sides of a stirring rod, the modified graphite felt cathodes (3) are arranged outside the aeration pipes (4), the aeration pipes (4) can rotate uniformly along with the stirring rod to aerate the cathodes (3), the anodes (5) are distributed around the cathodes (3) in the vertical direction, and the two adjacent anodes (5) are placed in front and back. The reactor realizes in-situ production of H2O2, reduces the dosage of Fe2+, reduces the cost of agents, and has the advantages of simple structure, short treatment period, low energy consumption and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for preparing a graphite felt cathode material and a modified graphite felt cathode electro-Fenton reactor. Background technique [0002] Graphite felt (GF) is a new carbon-based material developed in the 1970s with a unique physical and chemical structure. Graphite felt has a large specific surface area and rich micropores, which can effectively absorb organic matter and anions and cations, and can be recycled and reused. At the same time, it is resistant to acid, alkali, high temperature, high hydrogen evolution potential, good conductivity and chemical stability. An ideal cathode electrocatalytic material. [0003] Electro-Fenton technology is an environmentally friendly and economical advanced oxidation technology, which uses hydroxyl radicals to effectively degrade various organic pollutants in wastewater, and can be used as a pretreatment process or advan...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/46109C02F1/725C02F2001/46133C02F2305/023
Inventor 戴捷王燕胡耀笛吴先威易俊陈丽君
Owner YANGTZE UNIVERSITY
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