Method for preparing titanium dioxide/active carbon electrode material from waste cotton textiles

A technology for preparing activated carbon and electrode materials, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex processing and brittle carbon fiber clusters, and achieve simple operation, low corrosiveness and low cost. Effect

Inactive Publication Date: 2017-04-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is more complicated to deal with, and the carbon fiber clusters are brittle and easy to break after high temperature treatment.

Method used

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  • Method for preparing titanium dioxide/active carbon electrode material from waste cotton textiles
  • Method for preparing titanium dioxide/active carbon electrode material from waste cotton textiles
  • Method for preparing titanium dioxide/active carbon electrode material from waste cotton textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Raw material pretreatment: the waste cotton textiles were washed, dried in a constant temperature drying oven at 70°C for 24 hours, cut to 2cm×1.5cm, and sealed for future use.

[0054] (2) Preparation of carbonized material: Weigh 10g of rags and place them in a tubular resistance furnace. Under a nitrogen atmosphere, the temperature is programmed at a rate of 3°C / min, raised to 450°C, kept for 40min, carbonized, and ground after cooling into powder to obtain carbonized material.

[0055] (3) Preparation of activated carbon: carbonized material and KOH were impregnated at room temperature for 8 hours at a mass ratio of 1:2, dried and placed in a tubular resistance furnace. Keep it at 800°C for 70 minutes, then take it out after cooling down. In order to remove the residual activator, grind it and wash it with 0.1mol / L hydrochloric acid, boil it with ultrapure water until the conductivity is less than 10μS / cm, and dry it to constant weight. It is cotton textile act...

Embodiment 2

[0058] (1) Raw material pretreatment: the waste cotton textiles were washed, dried in a 90°C constant temperature drying oven for 22 hours, cut to 2cm×1.5cm, and sealed for future use.

[0059] (2) Preparation of carbonized material: Weigh rags and place them in a tubular resistance furnace. Under a nitrogen atmosphere, the temperature is programmed at a rate of 4°C / min, raised to 400°C, and kept for 60 minutes for carbonization treatment. After cooling down, grind into Powder, in carbonized material.

[0060] (3) Preparation of activated carbon: carbonized material and KOH were impregnated at room temperature for 24 hours at a mass ratio of 1:0.5, dried and placed in a tubular resistance furnace. Keep it at 900°C for 40 minutes, then take it out after cooling down. In order to remove the residual activator, grind it and wash it with 0.15mol / L hydrochloric acid, boil it with ultrapure water until the conductivity is less than 10μS / cm, and dry it to constant weight. It is cott...

Embodiment 3

[0063] (1) Raw material pretreatment: the waste cotton textiles were washed, dried in a constant temperature drying oven at 80°C for 20 hours, cut to 2cm×1.5cm, and sealed for future use.

[0064] (2) Preparation of carbonized material: Weigh the raw material and place it in a tubular resistance furnace. Under a nitrogen atmosphere, the temperature is programmed at a rate of 5°C / min, raised to 350°C, kept for 50min, carbonized, and ground into powder after cooling down. Get carbonized material.

[0065] (3) Preparation of activated carbon: carbonized material and KOH were impregnated at room temperature for 16 hours at a mass ratio of 1:1, dried and then placed in a tubular resistance furnace. Keep it at 700°C for 50 minutes, then take it out after cooling down. In order to remove the residual activator, grind it and wash it with 0.12mol / L hydrochloric acid, boil it with ultrapure water until the conductivity is less than 10μS / cm, and dry it to constant weight. It is cotton t...

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Abstract

The invention discloses a method for preparing a titanium dioxide/active carbon electrode material from waste cotton textiles. A KOH chemical activation method is adopted, active carbon is prepared through a tube type resistance furnace at the nitrogen atmosphere in a high-temperature carbonization and activation manner, and a titanium dioxide loaded active carbon electrode material is prepared through a sol-gel method and a calcination method. The method is implemented specially according to the following steps that firstly, raw materials are pretreated; secondly, carbonization materials are prepared; thirdly, the active carbon is prepared; and fourthly, the TiO2/active carbon electrode material is prepared. By means of the method, the high-performance active carbon with high specific area is obtained, the electrode material prepared from the active carbon loaded with titanium dioxide has excellent electrochemical performance, and efficient recycling of the waste cotton textiles is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and relates to resource utilization of waste cotton textiles, in particular to a method for preparing titanium dioxide / activated carbon electrode materials from waste cotton textiles. Background technique [0002] In recent years, with the increasing population of our country, the pursuit of quality of life and the rapid development of the textile industry, the continuous increase in the output of textiles, the rapid increase in consumption and the shortening of the use cycle have led to the generation of a large number of waste textiles. my country's annual output of waste textiles exceeds 2.6×107t, and it continues to grow; by the end of the "Twelfth Five-Year Plan", the cumulative amount will exceed 1×109t, including 7×107t for chemical fibers and 3×107t for natural fibers, including Pure cotton or cotton-containing textiles with a high proportion. At present, only a sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/372C01B32/348C01B32/324
CPCC01P2006/40C01P2006/12C01P2004/03C01P2002/80C01P2002/72
Inventor 李海红薛慧李红艳常华
Owner XI'AN POLYTECHNIC UNIVERSITY
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