Method for preparing electrode material using electroplating sludge-eggshell membrane

A technology for electroplating sludge and preparing electrodes, which is applied in chemical instruments and methods, cable/conductor manufacturing, circuits, etc., can solve the problem of high cost, and achieve the effects of improving conductivity, easy control of conditions, and simple operation.

Active Publication Date: 2016-08-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heavy metals need to be added during the electrode preparation process, and the cost is high

Method used

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  • Method for preparing electrode material using electroplating sludge-eggshell membrane
  • Method for preparing electrode material using electroplating sludge-eggshell membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Choose fresh eggshells, soak the eggshells in 1mol / L hydrochloric acid solution for 0.5h, peel off the inner membrane and wash with water, and then blow dry at room temperature.

[0048] (2) Crush the electroplating sludge into small particles with a particle size of 15mm or less. According to the volume ratio of electroplating sludge to water is 1:2, add water to the electroplating sludge and stir to form electroplating sludge fluid.

[0049] (3) Sodium hydroxide solution is used for leaching treatment, and the electroplating sludge fluid is injected into the reactor. The reaction temperature is 30°C, the pressure is 1MPa, the volume ratio of electroplating sludge fluid to alkali is 1:2, and alkali is added for 5 times .

[0050] (4) Soak the eggshell membrane in multiple alkaline washing mixtures for 3 hours, and put it in an oven at room temperature to raise the temperature from room temperature to 5°C every 5 minutes to 80°C and dry for 4 hours.

[0051] (5) Pu...

Embodiment 2

[0055] (1) Choose fresh duck eggshells, soak the eggshells in 1.5mol / L hydrochloric acid solution for 0.5h, peel off the inner membrane and wash with clean water, and then blow dry at room temperature.

[0056] (2) Crush the electroplating sludge into small particles with a particle size of 15mm or less. According to the volume ratio of electroplating sludge to water is 1:2.5, add water to the electroplating sludge and stir to form electroplating sludge fluid.

[0057] (3) Hydrochloric acid solution was used for leaching treatment, and the electroplating sludge fluid was injected into the reactor. The reaction temperature was 40°C, the pressure was 1.5MPa, the volume ratio of electroplating sludge fluid to acid was 1:2, and acid was added for 5 times of leaching.

[0058] (4) Soak the eggshell membrane in multiple pickling mixtures for 5 hours, and put it in an oven at room temperature to raise the temperature from room temperature to 5°C every 5 minutes to 80°C and dry for 4 h...

Embodiment 3

[0062] (1) Choose fresh goose eggshells, soak the eggshells in 2mol / L hydrochloric acid solution for 1 hour, peel off the inner membrane and wash with clean water, and then blow dry at room temperature.

[0063] (2) Crush the electroplating sludge into small particles with a particle size of 15mm or less. According to the volume ratio of electroplating sludge to water is 1:2.5, add water to the electroplating sludge and stir to form electroplating sludge fluid.

[0064] (3) Hydrochloric acid solution was used for leaching treatment, and the electroplating sludge fluid was injected into the reactor. The reaction temperature was 35°C, the pressure was 2MPa, the volume ratio of electroplating sludge fluid to acid was 1:2.5, and acid was added for 5 times of leaching.

[0065] (4) Soak the eggshell membrane in multiple pickling mixtures for 4 hours, and put it in an oven at room temperature to raise the temperature from room temperature to 5°C every 3 minutes to 80°C and dry for 4 ...

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Abstract

A method for preparing electrode materials from electroplating sludge-eggshell membranes. The method adopts acid-base treatment to leach heavy metal ions in the electroplating sludge, and carbonizes the eggshell membrane after absorbing the metal ions to form a carbonized eggshell membrane-nano particle composite material, which is applied in the field of electrochemistry. The poultry egg film material used in the preparation method of the present invention can be reused as daily waste, and through the recycling treatment of industrial waste electroplating sludge, not only the environmental pollution can be alleviated, but also the waste can be fully utilized to achieve the purpose of resource recycling, and The preparation method is simple and the cost is low. The carbonization of the eggshell membrane forms a three-dimensional porous cross-linked structure, and the microscale effect, electrical conductivity, and good biocompatibility of the nanoparticles jointly improve the electrical conductivity of the material and increase the specific surface area of ​​the material. This material can be widely used as electrode material for energy storage devices, adsorption material, biosensor and electrode material for electroadsorption desalination, etc.

Description

technical field [0001] The invention relates to a method for preparing an electrode material, in particular to a method for preparing an electrode material by using electroplating sludge-eggshell membrane. Background technique [0002] Electroplating sludge is the "final state" of wastewater treatment in the electroplating industry. The chemical composition is quite complex, mainly containing heavy metal compounds such as chromium, iron, nickel, copper, zinc, and soluble salts. The discharge of electroplating sludge accounts for more than 5% of the total annual solid waste discharge in my country, and is included in the seventeenth category of hazardous waste in the national hazardous waste list. At present, harmless landfill is the main treatment method for electroplating sludge at home and abroad. So far, there is no comprehensive utilization method that takes into account both environmental and economic benefits. [0003] Due to the complex composition of heavy metals in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00B01J20/20C01B31/02
Inventor 赵赫曹宏斌李玉平刘晨明林晓
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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