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Method for preparing carbon nanofiber membrane

A carbon nanofiber and tellurium nanotechnology applied in the field of nanomaterials to achieve good flexibility, uniform diameter, and controllable pore size

Inactive Publication Date: 2011-09-14
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the assembly of carbon nanofibers into carbon nanofiber membranes, nor the use of carbon nanofiber membranes in membrane separation technology.

Method used

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  • Method for preparing carbon nanofiber membrane
  • Method for preparing carbon nanofiber membrane
  • Method for preparing carbon nanofiber membrane

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[0031] The invention provides a kind of preparation method of carbon nanofiber membrane, comprises the following steps:

[0032] a) mixing tellurium nanowires and glucose in an aqueous solution, and performing a carbonization reaction to obtain carbon-coated tellurium nanocables;

[0033] b) adding hydrochloric acid and hydrogen peroxide to the carbon-coated tellurium nano-cable, and performing an oxidation reaction to obtain carbon nanofibers;

[0034] c) dispersing the carbon nanofibers in a solvent to obtain a slurry, applying the slurry on a support material, and drying to obtain a carbon nanofiber film.

[0035] The present invention uses tellurium nanowires as a template and glucose as a raw material to obtain carbon-coated tellurium nano-cables; then hydrogen peroxide is used as an oxidant to remove the tellurium core in carbon-coated tellurium nano-cables in the presence of hydrochloric acid to obtain carbon nano-cables. fibers; and then carbon nanofibers are formed i...

Embodiment 1

[0051] 1g polyvinylpyrrolidone and 92mg Na 2 TeO 3 Add it into 32mL of water, stir evenly, then add 1.67mL of hydrazine hydrate and 3.33mL of ammonia water, stir until the phases are evenly separated, then place in a sealed container, raise the temperature to 180°C and react for 3 hours to obtain Te nanowires, adjust the concentration of Te nanowires , to obtain 0.18g / L Te nanowire aqueous solution;

[0052] Mix 100mL of the Te nanowire aqueous solution with 100mL of 67g / L glucose aqueous solution, stir evenly, place in an airtight container, and carry out hydrothermal carbonization reaction at 160°C. After reacting for 18h, cool to room temperature to obtain C-coated Te nanowires. Cable, adjust the concentration of the Te nano-cable covered by the C, obtain the Te nano-cable aqueous solution of 5g / L;

[0053] Add 100 mL of 0.5 mol / L hydrochloric acid and 100 mL of 0.5 mol / L hydrogen peroxide to 100 mL of Te nanocable aqueous solution, stir and react, centrifuge, wash and dr...

Embodiment 2

[0063] 1g polyvinylpyrrolidone and 92mg Na 2 TeO 3 Add it into 32mL of water, stir evenly, then add 1.67mL of hydrazine hydrate and 3.33mL of ammonia water, stir until the phases are evenly separated, then place in a sealed container, raise the temperature to 180°C and react for 3 hours to obtain Te nanowires, adjust the concentration of Te nanowires , to obtain 0.18g / L Te nanowire aqueous solution;

[0064] Mix 100mL of the Te nanowire aqueous solution with 100mL of 67g / L glucose aqueous solution, stir evenly, place in a closed container, and carry out hydrothermal carbonization reaction at 160°C. After reacting for 24h, cool to room temperature to obtain C-coated Te nanowires. Cable, adjust the Te nano-cable of described C coating, obtain the Te nano-cable aqueous solution of 5g / L;

[0065] Add 100 mL of 0.5 mol / L hydrochloric acid and 100 mL of 0.5 mol / L hydrogen peroxide to 100 mL of Te nanocable aqueous solution, stir and react, centrifuge, wash and dry the reaction mix...

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Abstract

The invention provides a method for preparing a carbon nanofiber membrane, which comprises the following steps of: a) mixing tellurium nanowires and glucose in aqueous solution, and performing carbonation reaction to obtain a carbon-coated tellurium nano cable; b) adding hydrochloric acid and hydrogen peroxide into the carbon-coated tellurium nano cable, and performing oxidation reaction to obtain carbon nanofibers; and c) dispersing the carbon nanofibers in a solvent o obtain slurry, coating the slurry on a support material, and drying to obtain the carbon nanofiber membrane. The prepared carbon nanofibers are uniform in diameter, so tht the obtained carbon nanofiber membrane has narrow pore diameter distribution; by controlling synthetic conditions of the nanofibers, carbon nanofibers with different diameters can be obtained, so that the pore diameter of the carbon nanofiber membrane is controllable, and the carbon nanofiber membrane is better applied to a membrane separation technology. In addition, the surface of the carbon nanofiber membrane is rich in hydrophilic groups, the water circulation quantity of the membrane is large, and the efficiency is high during membrane separation.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a carbon nanofiber film. Background technique [0002] Membrane separation technology is a technology that uses the selective separation of membranes to realize the separation, purification and concentration of different components of feed liquid. It has the advantages of high efficiency, energy saving, environmental protection, molecular level filtration, simple filtration process, and easy control. Widely used in food, medicine, biology, environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment, electronics, bionics and other fields. [0003] The efficiency of membrane separation depends on the properties of the membrane itself. Among them, films formed by one-dimensional nanomaterials, such as nanowires, nanotubes, nanofibers, etc., have better filtration and separation effects due to their large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D67/00D01F9/12C01B19/02B82Y40/00
Inventor 俞书宏梁海伟
Owner UNIV OF SCI & TECH OF CHINA
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