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Carbon cloth electrode surface electrochemical oxidation method and heavy metal adsorption method

A carbon cloth electrode and electrochemical technology, applied in the field of chemical oxidation on the surface of carbon cloth electrodes, can solve the problems of limited active sites on the surface of carbon cloth electrodes, destroying electrode conductivity, etc. The effect of strong controllability of activity and oxidation degree

Active Publication Date: 2020-06-23
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problem that the active sites on the surface of the existing carbon cloth electrode are limited, and increasing the active site will destroy the conductivity of the electrode, and provides a method for electrochemical oxidation of the surface of the carbon cloth electrode and the ability to adsorb heavy metals method

Method used

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  • Carbon cloth electrode surface electrochemical oxidation method and heavy metal adsorption method
  • Carbon cloth electrode surface electrochemical oxidation method and heavy metal adsorption method
  • Carbon cloth electrode surface electrochemical oxidation method and heavy metal adsorption method

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specific Embodiment approach 1

[0017] Embodiment 1: This embodiment is a method for electrochemical oxidation of the surface of a carbon cloth electrode, which is specifically carried out according to the following steps:

[0018] 1. Pretreatment of carbon cloth: Put the carbon cloth into acetone and ultrasonically soak for 24h~25h to remove the organic matter on the surface of the carbon cloth, then put it into absolute ethanol and ultrasonically soak for 24h~25h to remove the residual acetone on the carbon cloth. Then soak in deionized water for 24h to 25h to remove the absolute ethanol on the surface of the carbon cloth, and finally dry at 70°C to 75°C to obtain a pretreated carbon cloth;

[0019] 2. Electrochemical oxidation: a three-electrode system is used, the electrolyte solution is sulfuric acid aqueous solution, the carbon cloth pretreated in step 1 is used as the working electrode, the platinum mesh is used as the counter electrode, and the saturated Ag / AgCl is used as the reference electrode, and...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, dry at 70° C. to obtain pretreated carbon cloth. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the scan rate in step 2 is 20 mV / s. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a carbon cloth electrode surface electrochemical oxidation method and a heavy metal adsorption method, which relates to a carbon cloth electrode surface chemical oxidation method and a heavy metal adsorption method. The invention aims to solve the technical problems that active sites on the surface of the existing carbon cloth electrode are limited, and the conductivity ofthe electrode is damaged by increasing the active sites. An electrochemical oxidation method is adopted; an electrolyte solution is a sulfuric acid solution, carbon cloth is used as a working electrode to oxidize the carbon cloth; the oxidation degree controllability is high, the conductive structure of the carbon cloth can be kept, the surface of the oxidized carbon cloth contains a large numberof oxygen-containing functional groups such as hydroxyl and carboxyl, the surface activity of the carbon cloth is improved, a large number of active sites are increased, the hydrophilicity of the oxidation-state carbon cloth electrode is improved, and then the adsorption and electrochemical treatment capacity of the carbon cloth electrode on heavy metal is improved. The carbon cloth electrode withthe electrochemically oxidized surface can be used as a working electrode to adsorb heavy metals by adopting an electrochemical method. The method is applied to heavy metal adsorption.

Description

technical field [0001] The invention relates to a method for chemically oxidizing the surface of a carbon cloth electrode and a method for adsorbing heavy metals. Background technique [0002] Carbon cloth Carbon Cloth, the abbreviation of carbon fiber cloth. It is made of pre-oxidized polyacrylonitrile fiber fabric by carbonization or carbon fiber by weaving. Due to the smooth surface of carbon cloth, small specific surface area, and chemical inertness, it is not efficient to directly treat heavy metal ions in water as an electrode. It is necessary to pretreat carbon cloth in a suitable way to increase the specific surface area of ​​carbon cloth and increase its surface. The type and number of functional groups. Currently commonly used methods include chemical oxidation, liquid phase oxidation, gas phase oxidation and so on. [0003] Heavy metal pollution refers to the phenomenon of environmental pollution caused by heavy metals or their compounds due to the discharge of...

Claims

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Application Information

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IPC IPC(8): C02F1/461G01N21/31C02F101/20
CPCC02F1/4672G01N21/3103C02F1/46109C02F2101/20
Inventor 杨利明胡文斌罗旭彪邵鹏辉石慧畅子雯
Owner NANCHANG HANGKONG UNIVERSITY