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A preparation method of nano-carbon fiber-metal composite for removing medium and low concentration volatile organic compounds

A technology of volatile organic compounds and metal complexes, applied in alkali metal compounds, alkali metal oxides/hydroxides, fiber treatment, etc., can solve the problems of low adsorption efficiency and small pore volume of activated carbon fibers, and achieve good catalysis Activity, high specific surface area, good continuity

Active Publication Date: 2016-11-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of low VOCs adsorption efficiency of existing activated carbon fibers and the clogging of pores impregnated with metal ions, resulting in smaller specific surface area and pore volume of carbon fiber composites, and to provide a carbon nanofiber that can be used for medium and low concentration VOCs treatment. - The preparation method of the metal composite uses lignin raw material and adopts electrospinning in-situ synthesis technology to uniformly disperse the metal elements on the surface of the carbon fiber carrier, maintaining the advantages of the developed pore structure and high specific surface area of ​​the carbon fiber composite surface, and Highlighting good catalytic activity, the prepared nanofibers are ordered, uniform in diameter, and inexpensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First accurately weigh 10g of polyvinyl alcohol particles and 10mL of 5% ZnCl by mass 2 Put it into a 200mL beaker, add 90mL of deionized water, place the mixture on a constant temperature magnetic stirrer and heat it to 90°C, and keep stirring the solution until the solution becomes a transparent colloidal liquid. 2 mixture;

[0022] Weigh 5.0 g of lignin powder into a 50 mL beaker, add 15.0 mL of acetic acid to the beaker with a pipette, heat the above mixture and keep stirring, set the end temperature to 70 °C, and take the above 5 when the temperature rises to 50 °C. % polyvinyl alcohol-ZnCl 2 5mL of the mixed solution was continuously heated and stirred in the above mixed solution. When the temperature rose to 70°C, the constant temperature was continuously stirred for 30 minutes, and then the heating device was turned off. Under stirring conditions, the solution was completely lowered to room temperature and then transferred to a 30mL syringe;

[0023] ...

Embodiment 2

[0027] First accurately weigh 10g of polyvinyl alcohol particles and 6mL of Fe with a mass percentage of 8% 3 O 4 Put it into a 200mL beaker, add 90mL of deionized water, place the mixture on a constant temperature magnetic stirrer and heat it to 90°C, and keep stirring the solution until the solution becomes a transparent colloidal liquid. 2 mixture;

[0028] Weigh 5.0 g of lignin powder into a 50 mL beaker, add 10 mL of acetic acid to the beaker with a pipette, heat the above mixture and keep stirring, set the end point temperature to 70 °C, and take the above 8% when the temperature rises to 50 °C. PVA-ZnCl 2 5mL of the mixed solution was continuously heated and stirred in the above mixed solution. When the temperature rose to 70°C, the constant temperature was continuously stirred for 30 minutes, and then the heating device was turned off. After the solution was completely lowered to room temperature under stirring conditions, it was transferred to a 30mL syringe w...

Embodiment 3

[0033] First accurately weigh 10g of polyvinyl alcohol particles and 5mL of 8% PdCl by mass 2 Put it into a 200mL beaker, add 90mL of deionized water, put the mixture on a constant temperature magnetic stirrer and heat it to 90°C, and keep stirring the solution until the solution becomes a transparent jelly-like liquid. 2 mixture;

[0034] Weigh 5.0 g of lignin powder into a 50 mL beaker, add 15.0 mL of acetic acid to the beaker with a pipette, heat the above mixture with constant stirring, set the end point temperature to 70°C, and take the above 10°C when the temperature rises to 50°C. % polyvinyl alcohol-ZnCl 2 5mL of the mixed solution was continuously heated and stirred in the above mixed solution. When the temperature rose to 70°C, the constant temperature was continuously stirred for 30 minutes, and then the heating device was turned off. Under stirring conditions, the solution was completely lowered to room temperature and then transferred to a 30mL syringe;

...

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Abstract

The invention discloses a preparation method of a nano carbon fiber-metal composite capable of removing medium / low-concentration volatile organic compounds, which comprises the following steps: carrying out in-situ synthesis on a transition metal and lignin-based nano fibers to form the composite, and carrying out preoxidation, carbonization and activation on the composite fibers to obtain the high-specific-area high-catalytic-property nano carbon fiber material. The metal element is uniformly dispersed on the surface of the carbon fiber carrier by the electrostatic spinning in-situ synthesis technique, and thus, the composite maintains the advantages of developed surface pore structure and high specific area of the carbon fiber composite and also has favorable catalytic activity. The prepared nano fibers are an ordered uniform-diameter cheap material.

Description

technical field [0001] The invention relates to the field of preparation methods of novel dual-function adsorption catalytic materials, in particular to a preparation method of nano carbon fiber-metal composites for removing medium and low concentration volatile organic compounds. Background technique [0002] Volatile organic compounds (VOCs), as one of the most important pollutants in the air, have great harm to human health, especially the human respiratory system and kidneys. There will also be secondary pollution problems such as photochemical smog. Therefore, the treatment of VOCs in exhaust gas has been the focus of environmental pollution control for a long time. However, due to the small molecule and low concentration of VOCs, it is difficult to find an effective removal method. The adsorption method to remove VOCs has the characteristics of simple operation, low investment and high adsorption efficiency. is widely used. [0003] So far, the reported adsorbents ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/17D01F1/10D01F11/10D01D5/00D01D1/02B01J20/20B01J20/30B01J20/28
Inventor 宋敏唐心红金保昇仲兆平
Owner SOUTHEAST UNIV
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