Method for preparing electrode materials by using electroplating sludge and eggshell membranes

A technology for electroplating sludge and preparing electrodes, 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, shortening process flow, and high power density

Active Publication Date: 2015-01-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 materials by using electroplating sludge and eggshell membranes
  • Method for preparing electrode materials by using electroplating sludge and eggshell membranes

Examples

Experimental program
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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

The invention relates to a method for preparing electrode materials by using electroplating sludge and eggshell membranes. The method comprises the steps that heave metal ions in the electroplating sludge are leached through acid and alkali treatment, the eggshell membranes adsorb the metal ions and then are carbonized, and carbonized eggshell membrane and nano particle composite materials are formed and applied to the field of electrochemistry. According to the method preparing the electrode materials by using the electroplating sludge and the eggshell membranes, the used eggshell membranes are daily waste and are recycled, resourceful treatment is conducted on the industrial waste of electroplating sludge, environment pollution is relieved, the waste is fully utilized, and the purpose of resourceful recycling is achieved. Furthermore, the preparing method is simple and low in cost. A three-dimensional porous cross-linked structure, the microscale effect of nano particles, electric conductivity and good biocompatibility are formed after the eggshell membranes are carbonized, the electric conductivity of the materials is improved, and the specific surface area of the materials is enlarged. The materials can be widely used as electrode materials of energy storage equipment, adsorption materials, biosensors, electric adsorption desalting electrode materials and the like.

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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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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