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Preparation method of polypyrrole modified activated carbon

A technology of activated carbon and polypyrrole, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of insufficient electrical conductivity, insufficient stability, poor connection ability of polypyrrole, etc., and achieve high degree of order, high crystallinity, The effect of good stability

Active Publication Date: 2020-06-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention solves the problem that the polypyrrole doped with inorganic anions is not stable enough, the polypyrrole doped with chloride ions has poor connection ability, is fragile and not stable enough, the surface charge distribution is not uniform enough, and the conductivity is not strong enough; at the same time, the polypyrrole doped with chlorine The ionic polypyrrole film is unstable in alkaline solution, and is easily attacked by hydroxyl groups with strong nucleophilic ability, deprotonated and dedoped, resulting in the technical problem that the conductivity of polypyrrole is reduced; a modified polypyrrole is provided Preparation method of activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Contrast dosage of activated carbon:

[0037] A preparation method of polypyrrole modified activated carbon, comprising the following steps:

[0038] (1) Pretreatment of activated carbon:

[0039] Select a certain amount of 10-20 mesh coconut shell / nut shell granular activated carbon, wash the granular activated carbon with ultrapure water several times, and dry it in a vacuum oven at 50°C-55°C to constant weight (dry for 24 h), then vacuum dry and store ,spare.

[0040] (2) Configuration of pyrrole solution:

[0041] Take pyrrole monomer in a beaker, add deionized water, and dissolve pyrrole in an ultrasonic water bath (sealed with plastic wrap), and configure 50ml, 1mol / L pyrrole solution.

[0042] (3) Activated carbon attached to pyrrole: (solid-to-liquid ratio 1g:20ml and 1g:20ml)

[0043] Put 2.5g, 10-20 mesh granular activated carbon and the pyrrole liquid in the step (2) into the sealed bottle, and fill it with nitrogen to seal. Shaker for 12 hours. When fi...

Embodiment 2

[0057] Dosage comparison of sodium benzenesulfonate:

[0058] (1) Pretreatment of activated carbon:

[0059] Select a certain amount of 10-20 mesh coconut shell / nut shell granular activated carbon, rinse the granular activated carbon with ultrapure water for several times, and dry it in a vacuum oven at 50°C-55°C to constant weight (dry for 24 h), then vacuum dry and store ,spare.

[0060] (2) Configuration of pyrrole solution:

[0061] Take pyrrole monomer in a beaker, add deionized water, and dissolve pyrrole in an ultrasonic water bath (sealed with plastic wrap), and configure 50ml, 1mol / L pyrrole solution.

[0062] (3) Activated carbon attached to pyrrole:

[0063] Put 2.5g, 10-20 mesh granular activated carbon and the pyrrole liquid in the step (2) into the sealed bottle, and fill it with nitrogen to seal. Shaker for 12 hours. When finished, pour out the liquid in the sealed bottle.

[0064] (4) Dosing of ferric chloride hexahydrate:

[0065] Weigh a certain amount...

Embodiment 3

[0077] Dosing time comparison of sodium benzenesulfonate:

[0078] (1) Pretreatment of activated carbon:

[0079] Select a certain amount of 10-20 mesh coconut shell / nut shell granular activated carbon, rinse the granular activated carbon with ultrapure water for several times, and dry it in a vacuum oven at 50°C-55°C to constant weight (dry for 24 h), then vacuum dry and store ,spare.

[0080] (2) Configuration of pyrrole solution:

[0081] Take pyrrole monomer in a beaker, add deionized water, and dissolve pyrrole in an ultrasonic water bath (sealed with plastic wrap), and configure 50ml, 1mol / L pyrrole solution.

[0082] (3) Activated carbon attached to pyrrole:

[0083] Put 2.5g, 10-20 mesh granular activated carbon and the pyrrole liquid in the step (2) into the sealed bottle, and fill it with nitrogen to seal. Shaker for 12 hours. When finished, pour out the liquid in the sealed bottle.

[0084] (4) Dosing of ferric chloride hexahydrate:

[0085] Weigh a certain a...

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Abstract

The invention relates to a preparation method of polypyrrole modified activated carbon. The method comprises the following steps: (1) selecting coconut shell / fruit shell granular activated carbon, washing and drying to constant weight, and carrying out vacuum drying and storage for later use; (2) preparing a pyrrole solution; (3) attaching pyrrole to the activated carbon; (4) adding ferric trichloride hexahydrate; (5) adding benzene sulfonic acid sodium salt; (6) cleaning and drying an obtained modified activated carbon in vacuum; (7) sealing with nitrogen, drying and storing. According to thepreparation method, organic anions ( benzene sulfonic acid sodium salt (BSNa)) are doped, so that laminar growth has a compact and ordered surface form and is highly doped in polypyrrole; the PPy film doped with aromatic sulfonate anions (benzene sulfonic acid sodium salt) has higher degree of order, crystallinity and conductivity, so that the pyrrole film has better stability in an alkaline solution; the ferric trichloride hexahydrate doped polypyrrole modified activated carbon is doped with the surfactant (benzene sulfonic acid sodium salt) at the same time, so that the surface charge distribution is more uniform, and the conductivity is stronger.

Description

technical field [0001] The invention relates to the field of preparation of modified activated carbon, in particular to a preparation method of polypyrrole modified activated carbon. Background technique [0002] Polypyrrole modified activated carbon has the effect of selectively adsorbing sulfate in water. At this stage, the common preparation methods of polypyrrole modified activated carbon mainly include: [0003] (1) Chemical polymerization: dissolve pyrrole in deionized water, shake pyrrole and activated carbon together for a period of time, filter and add a certain amount of ferric chloride hexahydrate (FeCl 3 ·6H 2 O) Continue to oscillate for a while. When pyrrole is oxidized to polypyrrole by ferric chloride hexahydrate, the doping of polypyrrole by chloride ions is realized. Ferric chloride hexahydrate is used as an initiator to oxidize pyrrole to be polypyrrole attached to the surface of activated carbon, and chloride ions are doped anions as "compensating char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/20B01J20/262B01J20/22B01J20/223
Inventor 张峰解立国王东升崔建国李红艳
Owner TAIYUAN UNIV OF TECH
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