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Preparation method of nano carbon fiber-metal composite capable of removing medium/low-concentration volatile organic compounds

A technology of volatile organic compounds and nano-carbon fibers, which is applied in the fields of 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 simple preparation methods Easy to operate, high specific surface area, good continuity

Active Publication Date: 2015-04-08
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 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 is a transparent colloidal liquid. Stop heating and stirring, and configure polyvinyl alcohol-ZnCl 2 mixture;

[0022] Weigh 5.0g of lignin powder into a 50mL beaker, add 15.0mL of acetic acid into the beaker with a pipette, heat the above mixed solution and keep stirring, set the end point temperature to 70°C, and take the above 50°C when the temperature rises to 50°C % Polyvinyl Alcohol - ZnCl 2 Continue to heat and stir 5mL of the mixed solution in the above mixed solution. When the temperature rises to 70°C, continue to stir at a constant temperature for 30 minutes, then turn off the heating device, and continue to transfer the solution to a 30mL syringe after the solution has completely cooled ...

Embodiment 2

[0027] Accurately weigh 10g of polyvinyl alcohol particles and 6mL of 8% Fe 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 is a transparent colloidal liquid. Stop heating and stirring, and configure polyvinyl alcohol-ZnCl 2 mixture;

[0028] Weigh 5.0g of lignin powder into a 50mL beaker, add 10mL of acetic acid into 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 Polyvinyl Alcohol - ZnCl 2 Continue to heat and stir 5mL of the mixed solution in the above mixed solution. When the temperature rises to 70°C, continue to stir at a constant temperature for 30 minutes, then turn off the heating device, and continue to transfer the solution to a 30mL syringe after the solution has completely cooled to room temperatu...

Embodiment 3

[0033] Accurately weigh 10 g of polyvinyl alcohol particles and 5 mL of 8% PdCl 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 is a transparent colloidal liquid. Stop heating and stirring, and configure polyvinyl alcohol-PdCl 2 mixture;

[0034] Weigh 5.0g of lignin powder into a 50mL beaker, add 15.0mL of acetic acid into the beaker with a pipette, heat the above mixed solution and keep stirring, set the end point temperature to 70°C, and take the above 10mL when the temperature rises to 50°C % Polyvinyl Alcohol - ZnCl 2 Continue to heat and stir 5mL of the mixed solution in the above mixed solution. When the temperature rises to 70°C, continue to stir at a constant temperature for 30 minutes, then turn off the heating device, and continue to transfer the solution to a 30mL syringe after the solution has completely cooled to ro...

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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] As one of the most important pollutants in the air, volatile organic compounds (VOCs) have a great ability to damage human health, especially the human respiratory system and kidneys, and the VOCs components emitted into the atmosphere are under light conditions. It will also produce 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 size and low concentration of VOCs, it is difficult to find an effective removal method. The adsorption method is used to remove VOCs due to its simple operation, low investment, and high ad...

Claims

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Application Information

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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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